/* ============================================
   FlashSlides - AI Presentation Generator
   Main Stylesheet
   ============================================ */

/* CSS Variables */
:root {
  --color-primary: #6366f1;
  --color-primary-dark: #4f46e5;
  --color-primary-light: #818cf8;
  --color-secondary: #f97316;
  --color-background: #0f0f1a;
  --color-surface: #1a1a2e;
  --color-surface-elevated: #252540;
  --color-text: #f8fafc;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --color-border: #334155;
  --color-success: #22c55e;
  --color-error: #ef4444;
  --color-warning: #f59e0b;

  --font-primary: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);

  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
}

/* Reset */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  background: var(--color-background);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

main {
  flex: 1;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ============================================
   Header
   ============================================ */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 15, 26, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

.header-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
}

.logo-icon {
  font-size: 1.75rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
  background: var(--color-surface);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* User Menu */
.user-menu {
  position: relative;
}

.user-button {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 6px 6px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  transition: var(--transition-fast);
}

.user-button:hover {
  background: var(--color-surface-elevated);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
}

.user-avatar-placeholder {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.875rem;
}

.user-name {
  font-weight: 500;
  font-size: 0.875rem;
}

.dropdown-arrow {
  transition: transform var(--transition-fast);
}

.user-menu:hover .dropdown-arrow {
  transform: rotate(180deg);
}

.user-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 240px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: var(--transition-fast);
}

.user-menu:hover .user-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.user-dropdown-header {
  padding: 16px;
  border-bottom: 1px solid var(--color-border);
}

.user-email {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text);
  margin-bottom: 4px;
}

.user-credits {
  font-size: 0.75rem;
  color: var(--color-primary-light);
  font-weight: 600;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: var(--transition-fast);
}

.dropdown-item:hover {
  background: var(--color-surface-elevated);
  color: var(--color-text);
}

.dropdown-item.logout {
  color: var(--color-error);
}

.dropdown-divider {
  border: none;
  height: 1px;
  background: var(--color-border);
  margin: 4px 0;
}

/* Hamburger Menu Button */
.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  cursor: pointer;
  padding: 10px;
  margin-left: 0.5rem;
  transition: var(--transition-fast);
}

.hamburger-btn:hover {
  background: var(--color-surface-elevated);
  border-color: var(--color-primary);
}

.hamburger-line {
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger-btn.open .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger-btn.open .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger-btn.open .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Navigation - Full Screen */
.mobile-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  background: #0f0f1a;
  z-index: 99999;
  display: none;
  flex-direction: column;
  padding: 1.25rem;
  overflow-y: auto;
  isolation: isolate;
  transform: translateZ(0);
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 1.5rem;
  flex-shrink: 0;
  position: relative;
}

.mobile-nav-close {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  cursor: pointer;
  color: #f8fafc;
  transition: var(--transition-fast);
  z-index: 2;
}

.mobile-nav-close svg {
  width: 24px;
  height: 24px;
}

.mobile-nav-close:hover {
  background: var(--color-surface-elevated);
  color: var(--color-text);
  border-color: var(--color-primary);
}

/* Mobile User Info */
.mobile-user-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  margin-bottom: 1.5rem;
  flex-shrink: 0;
}

.mobile-user-avatar {
  width: 52px;
  height: 52px;
  min-width: 52px;
  border-radius: 50%;
  object-fit: cover;
}

.mobile-user-avatar-placeholder {
  width: 52px;
  height: 52px;
  min-width: 52px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 1.25rem;
}

.mobile-user-details {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  overflow: hidden;
  flex: 1;
}

.mobile-user-name {
  font-weight: 600;
  color: var(--color-text);
  font-size: 1rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mobile-user-email {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
  margin-bottom: 1.5rem;
}

.mobile-nav-link {
  display: block;
  padding: 1rem 1.25rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 500;
  border-radius: 12px;
  transition: var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  background: var(--color-surface);
  color: var(--color-text);
}

.mobile-nav-link.active {
  color: var(--color-primary);
  background: rgba(99, 102, 241, 0.15);
}

.mobile-nav-footer {
  padding: 1.5rem 0;
  border-top: 1px solid var(--color-border);
  margin-top: auto;
  flex-shrink: 0;
  position: sticky;
  bottom: 0;
  background: #0f0f1a;
}

.mobile-auth-btn {
  width: 100%;
  padding: 1rem;
  font-size: 1rem;
}

.mobile-logout-btn {
  width: 100%;
  padding: 1rem;
  font-size: 1rem;
  display: block;
  text-align: center;
  color: #f8fafc !important;
  text-decoration: none;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

/* User Credits Badge in Header */
.user-credits {
  display: flex;
  align-items: center;
  padding: 0.4rem 0.75rem;
  background: rgba(99, 102, 241, 0.15);
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 20px;
  transition: var(--transition-fast);
}

.user-credits:hover {
  background: var(--color-primary);
  color: white;
}

.user-credits-dropdown {
  color: var(--color-primary);
  font-weight: 600;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
  box-shadow: var(--shadow-sm), 0 0 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md), 0 0 30px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-surface-elevated);
  border-color: var(--color-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border: none;
}

.btn-ghost:hover {
  color: var(--color-primary-light);
  background: rgba(99, 102, 241, 0.1);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary-light);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: white;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1.125rem;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.875rem;
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  padding: 80px 24px 120px;
  text-align: center;
  background: radial-gradient(ellipse at top, rgba(99, 102, 241, 0.15) 0%, transparent 60%);
}

.hero--page {
  padding: 60px 24px 80px;
}

/* Hero Color Variants for SEO Pages */
.hero--orange {
  background: radial-gradient(ellipse at top, rgba(249, 115, 22, 0.15) 0%, transparent 60%);
}

.hero--orange .highlight,
.hero--orange .hero-badge {
  color: #f97316;
}

.hero--orange .generate-btn {
  background: linear-gradient(135deg, #f97316, #ea580c);
}

.hero--green {
  background: radial-gradient(ellipse at top, rgba(34, 197, 94, 0.15) 0%, transparent 60%);
}

.hero--green .highlight,
.hero--green .hero-badge {
  color: #22c55e;
}

.hero--green .generate-btn {
  background: linear-gradient(135deg, #22c55e, #16a34a);
}

.hero--blue {
  background: radial-gradient(ellipse at top, rgba(59, 130, 246, 0.15) 0%, transparent 60%);
}

.hero--blue .highlight,
.hero--blue .hero-badge {
  color: #3b82f6;
}

.hero--blue .generate-btn {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.hero-container {
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.hero-badge span {
  color: var(--color-primary-light);
  font-weight: 600;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto 48px;
}

/* Generator Form */
.generator-form {
  max-width: 600px;
  margin: 0 auto;
}

.generator-input-wrapper {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.generator-input {
  flex: 1;
  padding: 16px 20px;
  font-size: 1rem;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text);
  transition: var(--transition-fast);
}

.generator-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
}

.generator-input::placeholder {
  color: var(--color-text-muted);
}

.slides-select {
  min-width: 160px;
  padding: 16px 44px 16px 20px;
  font-size: 0.9375rem;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text);
  transition: var(--transition-fast);
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 16px;
}

.slides-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
}

.slides-select:hover {
  border-color: var(--color-primary);
}

.generate-btn {
  padding: 16px 32px;
  font-size: 1rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  border-radius: var(--radius-lg);
  transition: var(--transition-fast);
}

.generate-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.generate-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.generator-hint {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.generator-hint .credits-info {
  color: var(--color-primary-light);
}

.generator-hint .free-info {
  color: var(--color-success);
}

.generator-hint .used-info {
  color: var(--color-text-muted);
}

/* ============================================
   Simple Hero (SlidesGPT-style)
   ============================================ */

.hero-simple {
  padding: 100px 24px 100px;
  text-align: center;
  background: radial-gradient(ellipse at top, rgba(99, 102, 241, 0.08) 0%, transparent 60%);
}

.hero-simple-container {
  max-width: 860px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-primary-light);
  margin-bottom: 24px;
}

.hero-simple-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 6vw, 4.25rem);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 40px;
  letter-spacing: -0.02em;
  line-height: 1.1;
  white-space: nowrap;
}

.hero-simple-title .title-ai {
  background: linear-gradient(135deg, var(--color-primary) 0%, #a78bfa 50%, #f472b6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.generator-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 28px;
  max-width: 100%;
  margin: 0 auto;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
}

.generator-textarea {
  width: 100%;
  min-height: 160px;
  padding: 20px;
  font-family: var(--font-primary);
  font-size: 1.0625rem;
  line-height: 1.6;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text);
  resize: none;
  transition: var(--transition-fast);
}

.generator-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.generator-textarea::placeholder {
  color: var(--color-text-muted);
}

.generator-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 16px;
}

.slides-selector {
  display: flex;
  align-items: center;
  gap: 12px;
}

.slides-selector label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.slides-dropdown {
  padding: 10px 16px;
  font-size: 0.9375rem;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  cursor: pointer;
  transition: var(--transition-fast);
}

.slides-dropdown:focus {
  outline: none;
  border-color: var(--color-primary);
}

.create-btn {
  padding: 16px 40px;
  font-size: 1.0625rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--color-primary) 0%, #4f46e5 100%);
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: 160px;
}

.create-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.45);
}

.create-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.create-btn .btn-text,
.create-btn .btn-loading {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.create-btn .btn-text[hidden],
.create-btn .btn-loading[hidden] {
  display: none !important;
}

.create-btn svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.create-btn .loading-spinner {
  width: 20px;
  height: 20px;
  border-width: 2px;
}

/* Hero Features */
.hero-features {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 32px;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.hero-features span {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-features svg {
  color: var(--color-success);
  flex-shrink: 0;
}

/* Color variants for SEO pages */
.hero-simple.hero--orange .create-btn {
  background: #f97316;
}

.hero-simple.hero--orange .create-btn:hover:not(:disabled) {
  background: #ea580c;
}

.hero-simple.hero--green .create-btn {
  background: #22c55e;
}

.hero-simple.hero--green .create-btn:hover:not(:disabled) {
  background: #16a34a;
}

.hero-simple.hero--blue .create-btn {
  background: #3b82f6;
}

.hero-simple.hero--blue .create-btn:hover:not(:disabled) {
  background: #2563eb;
}

@media (max-width: 768px) {
  .hero-simple-title {
    white-space: normal;
    font-size: clamp(2.25rem, 8vw, 3rem);
  }
}

@media (max-width: 600px) {
  .hero-simple {
    padding: 60px 16px 60px;
  }

  .generator-card {
    padding: 20px;
  }

  .generator-textarea {
    min-height: 120px;
  }

  .generator-controls {
    flex-direction: column;
    gap: 12px;
  }

  .slides-selector {
    width: 100%;
    justify-content: space-between;
  }

  .create-btn {
    width: 100%;
    justify-content: center;
  }

  .hero-features {
    flex-direction: column;
    gap: 12px;
    align-items: center;
  }
}

/* Hero Stats */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 48px;
}

.hero-stat {
  text-align: center;
}

.hero-stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

.hero-stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Hero Form */
.hero-form {
  max-width: 600px;
  margin: 0 auto;
}

.highlight {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 24px;
}

/* ============================================
   Presentation Cards
   ============================================ */

.presentations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.presentation-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-fast);
}

.presentation-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.presentation-thumbnail {
  aspect-ratio: 16/9;
  background: var(--color-surface-elevated);
  overflow: hidden;
}

.presentation-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.presentation-thumbnail-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--color-text-muted);
}

.presentation-content {
  padding: 20px;
}

.presentation-category {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(99, 102, 241, 0.15);
  color: var(--color-primary-light);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

.presentation-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.presentation-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.presentation-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ============================================
   Sections
   ============================================ */

/* ============================================
   Page Headers
   ============================================ */

.page-header {
  padding: 40px 24px 24px;
  text-align: center;
  background: var(--color-background);
}

.page-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.page-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

/* ============================================
   Sections
   ============================================ */

.section {
  padding: 40px 24px 60px;
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 32px;
}

.section-title {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   Features
   ============================================ */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  padding: 32px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: var(--transition-fast);
}

.feature-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
}

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-radius: var(--radius-md);
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.feature-description {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

/* ============================================
   CTA Section
   ============================================ */

.cta-section {
  padding: 100px 24px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  text-align: center;
}

.cta-content {
  max-width: 700px;
  margin: 0 auto;
}

.cta-title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: white;
  margin-bottom: 16px;
}

.cta-subtitle {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 32px;
}

.cta-buttons .btn-primary {
  background: white;
  color: var(--color-primary-dark);
}

.cta-buttons .btn-primary:hover {
  background: rgba(255, 255, 255, 0.9);
}

.cta-buttons .btn-outline {
  border-color: white;
  color: white;
}

.cta-buttons .btn-outline:hover {
  background: white;
  color: var(--color-primary-dark);
}

.cta-features {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.9375rem;
}

.cta-features span {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ============================================
   Recent Presentations Section
   ============================================ */

.recent-presentations {
  padding: 80px 24px;
}

.section-footer {
  text-align: center;
  margin-top: 40px;
}

.empty-state {
  text-align: center;
  padding: 60px 24px;
  color: var(--color-text-muted);
}

/* ============================================
   How It Works
   ============================================ */

.how-it-works {
  padding: 80px 24px;
  background: var(--color-surface);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.step-card {
  text-align: center;
  position: relative;
  padding: 32px;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.step-number {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-light);
  margin: 0 auto 16px;
}

.step-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.step-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
}

/* ============================================
   Perfect For Section
   ============================================ */

.perfect-for {
  padding: 80px 0;
}

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.use-case-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition-fast);
}

.use-case-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
}

.use-case-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.use-case-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--color-text);
}

.use-case-card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ============================================
   Testimonials Section
   ============================================ */

.testimonials {
  padding: 80px 24px;
  background: var(--color-surface);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.testimonial-stars {
  color: #fbbf24;
  font-size: 1.125rem;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.testimonial-text {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, #4f46e5 100%);
  color: white;
  font-weight: 600;
  font-size: 1rem;
  border-radius: 50%;
}

.author-info {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-weight: 600;
  color: var(--color-text);
  font-size: 0.9375rem;
}

.author-role {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

@media (max-width: 1024px) {
  .use-cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  .use-cases-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Contact Page
   ============================================ */

.contact-section {
  padding: 20px 24px 40px;
}

.contact-compact {
  max-width: 600px;
  margin: 0 auto;
}

.contact-main {
  display: flex;
  align-items: center;
  gap: 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
}

.contact-icon-large {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, #4f46e5 100%);
  border-radius: var(--radius-lg);
  flex-shrink: 0;
  color: white;
}

.contact-details {
  flex: 1;
}

.contact-details h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.contact-details p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.contact-email-link {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-primary);
  text-decoration: none;
}

.contact-email-link:hover {
  text-decoration: underline;
}

.contact-response {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.contact-response svg {
  color: var(--color-primary);
}

@media (max-width: 600px) {
  .contact-main {
    flex-direction: column;
    text-align: center;
  }

  .contact-main .btn {
    width: 100%;
  }
}

/* Legacy contact styles (unused but kept for reference) */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}

.contact-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  transition: var(--transition-fast);
}

.contact-card:hover {
  border-color: var(--color-primary);
}

.contact-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, #4f46e5 100%);
  border-radius: var(--radius-lg);
  margin: 0 auto 20px;
  color: white;
}

.contact-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.contact-card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.contact-email {
  display: block;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary-light);
  margin-bottom: 20px;
}

.contact-email:hover {
  text-decoration: underline;
}

.response-badge {
  display: inline-block;
  padding: 8px 16px;
  background: rgba(34, 197, 94, 0.15);
  color: var(--color-success);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-full);
}

.contact-info {
  max-width: 800px;
  margin: 0 auto;
}

.contact-info h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 32px;
  color: var(--color-text);
}

.help-topics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.help-topic {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.topic-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.help-topic h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.help-topic p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

@media (max-width: 900px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .help-topics {
    grid-template-columns: 1fr;
  }
}

.step-description {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

/* ============================================
   Use Cases
   ============================================ */

.use-cases {
  padding: 80px 24px;
}

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.use-case-card {
  text-align: center;
  padding: 32px 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: var(--transition-fast);
}

.use-case-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
}

.use-case-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.use-case-card h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.use-case-card p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* ============================================
   FAQ
   ============================================ */

.faq-section {
  padding: 40px 24px 60px;
}

.faq-section .section-header {
  margin-bottom: 32px;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: var(--transition-fast);
}

.faq-question:hover {
  background: var(--color-surface-elevated);
}

.faq-icon {
  font-size: 1.25rem;
  color: var(--color-primary-light);
  transition: transform var(--transition-fast);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.faq-item.open .faq-answer {
  max-height: 500px;
}

.faq-answer p,
.faq-answer-content {
  padding: 0 24px 20px;
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ============================================
   Footer
   ============================================ */

.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 48px 24px 32px;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-main {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  margin-bottom: 48px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-tagline {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  max-width: 280px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-column h4 {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text);
  margin-bottom: 16px;
}

.footer-column a {
  display: block;
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 12px;
  transition: var(--transition-fast);
}

.footer-column a:hover {
  color: var(--color-primary-light);
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* ============================================
   Presentation Viewer
   ============================================ */

.presentation-page {
  background: var(--color-background);
  overflow-x: hidden;
  width: 100%;
}

.presentation-header {
  padding: 32px 24px;
  border-bottom: 1px solid var(--color-border);
}

.presentation-header .container {
  max-width: 1200px;
  margin: 0 auto;
}

.header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.header-left {
  flex: 1;
  min-width: 0;
}

.presentation-page .presentation-title {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
  line-height: 1.3;
}

.presentation-page .presentation-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.header-actions .download-btn {
  padding: 10px 16px;
  font-size: 0.875rem;
}

.header-actions .action-btn {
  padding: 10px;
}

.header-actions .action-btn span {
  display: none;
}

.private-badge {
  color: #f97316;
}

/* Presentation Toolbar */
.presentation-toolbar {
  padding: 16px 24px;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.presentation-toolbar .container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.toolbar-downloads {
  display: flex;
  gap: 12px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  transition: var(--transition-fast);
}

.download-pptx {
  background: linear-gradient(135deg, #ea580c 0%, #c2410c 100%);
  color: white;
}

.download-pptx:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(234, 88, 12, 0.3);
}

.download-pdf {
  background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
  color: white;
}

.download-pdf:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(220, 38, 38, 0.3);
}

.toolbar-actions {
  display: flex;
  gap: 8px;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: var(--transition-fast);
}

.action-btn:hover {
  border-color: var(--color-primary);
  background: var(--color-background);
}

.action-btn.action-danger {
  color: var(--color-error);
}

.action-btn.action-danger:hover {
  border-color: var(--color-error);
  background: rgba(239, 68, 68, 0.1);
}

.presentation-viewer {
  padding: 32px 24px 60px;
}

.presentation-viewer .container {
  max-width: 1200px;
  margin: 0 auto;
}

.viewer-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  align-items: start;
}

/* Slides Sidebar */
.slides-sidebar {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  position: sticky;
  top: 100px;
}

.sidebar-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.slides-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: calc(100vh - 220px);
  overflow-y: auto;
}

.slide-thumb {
  padding: 14px 16px;
  background: var(--color-surface-elevated);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-fast);
}

.slide-thumb:hover {
  border-color: var(--color-border);
  background: var(--color-background);
}

.slide-thumb.active {
  border-color: var(--color-primary);
  background: rgba(99, 102, 241, 0.1);
}

.slide-num {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}

.slide-name {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text);
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Main Slide Viewer */
.slide-viewer {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.slide-container {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 16px;
}

.slide {
  display: none;
}

.slide.active {
  display: block;
}

.slide-content {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
}

.slide-content.title-slide {
  grid-template-columns: 1fr 1fr;
  background: linear-gradient(135deg, var(--color-primary) 0%, #4f46e5 100%);
}

.slide-content.title-slide .title-left {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 40px;
}

.slide-content.title-slide .slide-heading {
  color: white;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  margin-bottom: 16px;
}

.slide-content.title-slide .slide-subheading {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1rem;
  line-height: 1.6;
}

.slide-content.title-slide .title-right {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(255, 255, 255, 0.1);
}

.slide-content.title-slide .title-right img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.slide-content.title-slide .slide-placeholder {
  font-size: 4rem;
  opacity: 0.5;
}

.slide-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px;
  text-align: center;
}

.slide-center .slide-heading {
  color: white;
  font-size: clamp(1.5rem, 3vw, 2.5rem);
}

.slide-center .slide-subheading {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.125rem;
  margin-top: 16px;
}

.slide-left {
  padding: 28px 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}

.slide-number {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: white;
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: 16px;
}

.slide-heading {
  font-family: var(--font-display);
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 16px;
  line-height: 1.2;
  flex-shrink: 0;
}

.slide-bullets {
  list-style: none;
  padding: 0;
  margin: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 12px;
  overflow: hidden;
}

.slide-bullets li {
  position: relative;
  padding-left: 24px;
  font-size: 0.9375rem;
  color: #475569;
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.slide-bullets li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 10px;
  height: 10px;
  background: var(--color-primary);
  border-radius: 50%;
}

.slide-right {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 100%);
}

.slide-right img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* Fullscreen Presentation Mode */
.slide-container:fullscreen,
.slide-container:-webkit-full-screen {
  background: #0f172a;
  padding: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.slide-container:fullscreen .slide,
.slide-container:-webkit-full-screen .slide {
  width: 100%;
  max-width: 1600px;
  height: auto;
}

.slide-container:fullscreen .slide-content,
.slide-container:-webkit-full-screen .slide-content {
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-xl);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
}

.slide-container:fullscreen .slide-left,
.slide-container:-webkit-full-screen .slide-left {
  padding: 60px;
}

.slide-container:fullscreen .slide-number,
.slide-container:-webkit-full-screen .slide-number {
  width: 56px;
  height: 56px;
  font-size: 1.25rem;
  margin-bottom: 24px;
}

.slide-container:fullscreen .slide-heading,
.slide-container:-webkit-full-screen .slide-heading {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 32px;
}

.slide-container:fullscreen .slide-bullets li,
.slide-container:-webkit-full-screen .slide-bullets li {
  font-size: 1.5rem;
  margin-bottom: 24px;
  padding-left: 36px;
  line-height: 1.5;
}

.slide-container:fullscreen .slide-bullets li::before,
.slide-container:-webkit-full-screen .slide-bullets li::before {
  width: 14px;
  height: 14px;
  top: 12px;
}

.slide-container:fullscreen .slide-center .slide-heading,
.slide-container:-webkit-full-screen .slide-center .slide-heading {
  font-size: clamp(2.5rem, 5vw, 4rem);
}

.slide-container:fullscreen .slide-center .slide-subheading,
.slide-container:-webkit-full-screen .slide-center .slide-subheading {
  font-size: 1.5rem;
  margin-top: 24px;
}

.slide-container:fullscreen .slide-right,
.slide-container:-webkit-full-screen .slide-right {
  padding: 40px;
}

.slide-container:fullscreen .slide-right img,
.slide-container:-webkit-full-screen .slide-right img {
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.slide-placeholder {
  font-size: 4rem;
  color: #94a3b8;
}

/* Navigation */
.slide-navigation {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.nav-btn {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-text);
  transition: var(--transition-fast);
}

.nav-btn:hover:not(:disabled) {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

.nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.slide-counter {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  min-width: 80px;
  text-align: center;
}

/* Responsive */
@media (max-width: 900px) {
  .viewer-layout {
    display: flex;
    flex-direction: column;
  }

  .slide-viewer {
    order: 1;
  }

  .slides-sidebar {
    position: static;
    order: 2;
    padding: 16px;
  }

  .slides-list {
    flex-direction: row;
    overflow-x: auto;
    max-height: none;
    padding-bottom: 8px;
    gap: 12px;
    -webkit-overflow-scrolling: touch;
  }

  .slide-thumb {
    min-width: 160px;
    flex-shrink: 0;
  }

  .slide-container {
    padding: 12px;
  }

  .slide-navigation {
    margin-top: 16px;
  }

  .nav-btn {
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 768px) {
  .presentation-toolbar .container {
    flex-direction: column;
    align-items: stretch;
  }

  .toolbar-downloads {
    justify-content: center;
  }

  .toolbar-actions {
    justify-content: center;
  }

  .action-btn span {
    display: none;
  }
}

@media (max-width: 900px) {
  .header-row {
    flex-direction: column;
    gap: 16px;
  }

  .header-actions {
    flex-wrap: wrap;
    justify-content: flex-start;
  }
}

@media (max-width: 600px) {
  .presentation-header {
    padding: 16px;
  }

  .presentation-header .container {
    padding: 0;
  }

  .presentation-title {
    font-size: 1.25rem;
    word-wrap: break-word;
  }

  .presentation-meta {
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.8rem;
  }

  .header-actions .download-btn span {
    display: none;
  }

  .presentation-header {
    padding: 16px;
  }

  .presentation-header .container {
    padding: 0;
  }

  .presentation-viewer {
    padding: 8px;
  }

  .presentation-viewer .container {
    padding: 0;
    max-width: 100%;
    overflow: hidden;
  }

  .viewer-layout {
    display: block !important;
    width: 100%;
  }

  .slide-viewer {
    width: 100%;
  }

  .slide-container {
    padding: 8px;
    width: 100%;
    overflow: hidden;
  }

  .slide-content {
    display: block !important;
    aspect-ratio: auto !important;
    height: auto !important;
    width: 100% !important;
    grid-template-columns: 1fr !important;
  }

  .slide-content.title-slide {
    display: block !important;
    grid-template-columns: 1fr !important;
  }

  .slide-content.title-slide .title-right {
    display: block !important;
    width: 100% !important;
    padding: 20px;
    min-height: 150px;
    text-align: center;
  }

  .slide-content.title-slide .title-right img {
    max-width: 90%;
    max-height: 140px;
    height: auto;
    margin: 0 auto;
    display: block;
  }

  .slide-content.title-slide .title-left {
    display: block !important;
    width: 100% !important;
    padding: 20px;
  }

  .slide-content.title-slide .slide-heading {
    font-size: 1.1rem;
  }

  .slide-content.title-slide .slide-subheading {
    font-size: 0.85rem;
  }

  .slide-left {
    display: block !important;
    width: 100% !important;
    padding: 16px;
  }

  .slide-right {
    display: block !important;
    width: 100% !important;
    padding: 16px;
    min-height: 140px;
    text-align: center;
  }

  .slide-right img {
    max-width: 90%;
    max-height: 140px;
    height: auto;
    margin: 0 auto;
    display: block;
  }

  .slide-heading {
    font-size: 1rem;
    word-wrap: break-word;
    overflow-wrap: anywhere;
  }

  .slide-bullets {
    padding-left: 0;
    max-height: none;
    overflow: visible;
  }

  .slide-bullets li {
    font-size: 0.875rem;
    padding-left: 20px;
    margin-bottom: 10px;
    display: block;
    -webkit-line-clamp: unset;
    -webkit-box-orient: initial;
    overflow: visible;
    text-overflow: unset;
  }

  .slide-bullets li::before {
    width: 8px;
    height: 8px;
    top: 8px;
    left: 0;
  }

  .slide-navigation {
    margin-top: 12px;
    gap: 12px;
  }

  .nav-btn {
    width: 40px;
    height: 40px;
  }

  .slide-counter {
    font-size: 0.85rem;
    min-width: 60px;
  }

  .slides-sidebar {
    padding: 12px;
    margin-top: 12px;
  }

  .sidebar-title {
    font-size: 0.7rem;
  }

  .slide-thumb {
    min-width: 140px;
    padding: 10px;
  }

  .slide-num {
    font-size: 0.65rem;
  }

  .slide-name {
    font-size: 0.75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .slide-num {
    font-size: 0.65rem;
  }

  .slide-name {
    font-size: 0.8rem;
  }
}

/* ============================================
   Dashboard
   ============================================ */

.dashboard {
  max-width: 1280px;
  margin: 0 auto;
  padding: 40px 24px;
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
}

.dashboard-title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
}

/* ============================================
   Pricing
   ============================================ */

.pricing-section {
  padding: 40px 24px 80px;
}

/* Free Banner */
.free-banner {
  display: flex;
  align-items: center;
  gap: 20px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  margin-bottom: 48px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.free-banner-icon {
  font-size: 2.5rem;
  flex-shrink: 0;
}

.free-banner-content {
  flex: 1;
}

.free-banner-content h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.free-banner-content p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.free-banner-content strong {
  color: var(--color-primary-light);
}

/* Single Pricing Card Layout */
.pricing-single {
  max-width: 420px;
  margin: 0 auto 48px;
}

.pricing-single .pricing-card {
  transition: all 0.3s ease;
}

.pricing-single .pricing-card .pricing-price {
  transition: all 0.2s ease;
}

.pricing-single .pricing-card .pricing-name {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

@keyframes pricePulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.02); box-shadow: 0 0 30px rgba(99, 102, 241, 0.4); }
  100% { transform: scale(1); }
}

/* Mobile-first pricing adjustments */
@media (max-width: 768px) {
  .pricing-single {
    margin: 0 auto 32px;
  }

  .pricing-single .pricing-card {
    padding: 32px 24px;
  }

  .credit-packs-title {
    font-size: 1.25rem;
  }
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  max-width: 800px;
  margin: 0 auto 60px;
}

.pricing-card {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 40px;
  text-align: center;
  transition: var(--transition-fast);
}

.pricing-card.featured {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

.pricing-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--color-primary);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
}

.pricing-name {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.pricing-price {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.pricing-price span {
  font-size: 1rem;
  color: var(--color-text-muted);
  font-weight: 400;
}

.pricing-description {
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin-bottom: 32px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-features .check {
  color: var(--color-success);
}

.credit-packs {
  max-width: 900px;
  margin: 0 auto;
}

.credit-packs-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 8px;
}

.credit-packs-subtitle {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: 24px;
}

.credit-packs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.credit-packs-grid.credit-packs-3 {
  grid-template-columns: repeat(3, 1fr);
}

.credit-pack {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: all 0.2s ease;
  cursor: pointer;
  font-family: inherit;
  color: inherit;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.credit-pack:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.2);
}

.credit-pack:active {
  transform: translateY(-2px);
}

.credit-pack.popular {
  border-color: var(--color-primary);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.2);
}

.credit-pack.popular:hover {
  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.35);
}

.credit-pack.selected {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(99, 102, 241, 0.05) 100%);
  box-shadow: 0 0 0 2px var(--color-primary), 0 8px 24px rgba(99, 102, 241, 0.25);
  transform: translateY(-4px);
}

.credit-pack.selected::after {
  content: '✓';
  position: absolute;
  top: 12px;
  right: 12px;
  width: 24px;
  height: 24px;
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: white;
  font-weight: bold;
}

.credit-pack.selected .pack-price {
  color: var(--color-text);
}

.pack-badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 12px;
  white-space: nowrap;
}

.pack-badge.best {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.pack-credits {
  display: block;
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.pack-price {
  display: block;
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary-light);
  margin-bottom: 4px;
}

.pack-per {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* ============================================
   About
   ============================================ */

.about-content {
  padding: 80px 24px;
}

.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-text h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 32px;
  margin-bottom: 16px;
}

.about-text h2:first-child {
  margin-top: 0;
}

.about-text p {
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-stats {
  display: grid;
  gap: 20px;
}

.about-stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
}

.about-stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary-light);
  margin-bottom: 4px;
}

.about-stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ============================================
   Archive
   ============================================ */

.archive-controls {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 32px;
}

.archive-filters {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 10px 18px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-text);
}

.filter-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

.search-form {
  display: flex;
  gap: 12px;
}

.search-input {
  width: 250px;
  padding: 10px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 0.9375rem;
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.search-input::placeholder {
  color: var(--color-text-muted);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 80px 24px;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
}

.empty-icon {
  font-size: 4rem;
  margin-bottom: 24px;
}

.empty-state h3 {
  font-size: 1.5rem;
  margin-bottom: 12px;
  color: var(--color-text);
}

.empty-state p {
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

/* Load More */
.load-more {
  text-align: center;
  margin-top: 48px;
}

/* ============================================
   Loading States
   ============================================ */

.loading-spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Generating Overlay */
.generating-overlay,
.failed-overlay {
  min-height: calc(100vh - 80px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 80px 24px 60px;
  background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.05) 0%, transparent 70%);
}

.generating-content,
.failed-content {
  text-align: center;
  max-width: 500px;
  padding: 60px 48px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.3);
}

.generating-spinner {
  width: 80px;
  height: 80px;
  border: 5px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 40px;
}

.generating-title,
.failed-title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
}

.generating-subtitle,
.failed-message {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: 40px;
  line-height: 1.6;
}

.generating-progress {
  margin-top: 32px;
}

.progress-bar {
  width: 100%;
  height: 10px;
  background: var(--color-surface-elevated);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: 20px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), #a78bfa, #f472b6);
  background-size: 200% 100%;
  border-radius: var(--radius-full);
  width: 5%;
  transition: width 0.5s ease;
  animation: shimmer 2s linear infinite;
}

@keyframes shimmer {
  0% { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

.progress-text {
  font-size: 1rem;
  color: var(--color-text-muted);
}

.failed-icon {
  font-size: 5rem;
  margin-bottom: 32px;
}

@media (max-width: 600px) {
  .generating-content,
  .failed-content {
    padding: 40px 24px;
  }

  .generating-spinner {
    width: 60px;
    height: 60px;
  }

  .generating-title,
  .failed-title {
    font-size: 1.5rem;
  }
}

.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 15, 26, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.loading-content {
  text-align: center;
}

.loading-content .loading-spinner {
  width: 48px;
  height: 48px;
  border-width: 3px;
  margin-bottom: 24px;
}

.loading-text {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
}

/* ============================================
   Alerts
   ============================================ */

.alert {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.alert-success {
  background: rgba(34, 197, 94, 0.15);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: var(--color-success);
}

.alert-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: var(--color-error);
}

.alert-warning {
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: var(--color-warning);
}

/* ============================================
   Error Page
   ============================================ */

.error-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 24px;
}

.error-code {
  font-family: var(--font-display);
  font-size: 8rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.error-message {
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  max-width: 400px;
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 1024px) {
  .footer-main {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .presentation-shell {
    grid-template-columns: 140px 1fr;
  }

  .presentation-tools {
    display: none;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .use-cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-stats {
    gap: 32px;
  }
}

@media (max-width: 768px) {
  /* Header */
  .header-container {
    height: 64px;
    padding: 0 1rem;
  }

  .nav-menu {
    display: none;
  }

  .header-actions .btn-nav-login,
  .header-actions .btn-nav-signup,
  .header-actions .user-menu {
    display: none;
  }

  .hamburger-btn {
    display: flex;
  }

  .user-credits {
    padding: 0.35rem 0.6rem;
    font-size: 0.75rem;
  }

  /* Container */
  .container {
    padding: 0 16px;
  }

  /* Section Titles */
  .section-title {
    font-size: 1.75rem;
  }

  .section-subtitle {
    font-size: 1rem;
  }

  .section-header {
    margin-bottom: 24px;
  }

  /* Hero */
  .hero {
    padding: 48px 16px 64px;
  }

  .hero h1,
  .hero-title {
    font-size: 1.75rem;
    line-height: 1.2;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .generator-input-wrapper {
    flex-direction: column;
  }

  .hero-stats {
    flex-direction: row;
    gap: 24px;
    flex-wrap: wrap;
  }

  .hero-stat-number {
    font-size: 1.5rem;
  }

  /* Pricing */
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .free-banner {
    flex-direction: column;
    text-align: center;
    padding: 20px;
  }

  .free-banner .btn {
    width: 100%;
  }

  .credit-packs-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Perfect For / Use Cases */
  .perfect-for {
    padding: 48px 0;
  }

  .use-cases-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .use-case-card {
    padding: 20px 16px;
  }

  .use-case-icon {
    font-size: 2rem;
    margin-bottom: 12px;
  }

  .use-case-title {
    font-size: 1rem;
  }

  .use-case-desc {
    font-size: 0.85rem;
  }

  /* FAQ */
  .faq-section {
    padding: 32px 16px 48px;
  }

  .faq-question {
    padding: 16px;
    font-size: 0.9375rem;
  }

  .faq-answer p,
  .faq-answer-content {
    padding: 0 16px 16px;
    font-size: 0.875rem;
  }

  /* Presentations */
  .presentation-shell {
    grid-template-columns: 1fr;
  }

  .presentation-sidebar {
    position: static;
    order: 2;
  }

  .slides-thumbnails {
    flex-direction: row;
    overflow-x: auto;
  }

  .slide-thumb {
    min-width: 140px;
  }

  .presentation-topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .presentation-actions {
    width: 100%;
  }

  .presentation-actions .btn {
    flex: 1;
    justify-content: center;
  }

  .slide-inner {
    grid-template-columns: 1fr;
  }

  .slide-image-area {
    order: -1;
    height: 220px;
  }

  .presentations-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* About */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .slide {
    grid-template-columns: 1fr;
  }

  .slide-image {
    order: -1;
    height: 250px;
  }

  /* Footer */
  .site-footer {
    padding: 48px 16px 32px;
  }

  .footer-links {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .footer-link-group h4 {
    font-size: 0.875rem;
    margin-bottom: 12px;
  }

  .footer-link-group a {
    font-size: 0.85rem;
  }

  .footer-bottom {
    padding-top: 24px;
    font-size: 0.8rem;
  }

  /* Dashboard */
  .dashboard-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .stat-card {
    padding: 20px 16px;
  }

  .stat-value {
    font-size: 1.5rem;
  }

  /* CTA */
  .cta-section {
    padding: 48px 16px;
  }

  .cta-title {
    font-size: 1.5rem;
  }

  .cta-subtitle {
    font-size: 0.95rem;
  }

  .cta-buttons {
    flex-direction: column;
    gap: 12px;
  }

  .cta-features {
    flex-direction: column;
    gap: 12px;
  }

  /* Archive */
  .archive-section {
    padding: 32px 16px;
  }

  .archive-header h1 {
    font-size: 1.75rem;
  }

  /* Buttons */
  .btn {
    padding: 12px 20px;
    font-size: 0.875rem;
  }

  .btn-lg {
    padding: 14px 24px;
    font-size: 0.9375rem;
  }
}

@media (max-width: 480px) {
  /* Section Titles */
  .section-title {
    font-size: 1.5rem;
  }

  .section-subtitle {
    font-size: 0.9rem;
  }

  /* Hero */
  .hero {
    padding: 40px 16px 56px;
  }

  .hero h1,
  .hero-title {
    font-size: 1.5rem;
  }

  .hero-subtitle {
    font-size: 0.9rem;
  }

  /* Pricing */
  .pricing-section {
    padding: 24px 12px 32px;
  }

  .pricing-single .pricing-card {
    padding: 24px 20px;
  }

  .pricing-price {
    font-size: 2.5rem;
  }

  .pricing-per {
    font-size: 0.85rem;
  }

  .credit-packs-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }

  .credit-packs-grid.credit-packs-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .credit-pack {
    padding: 14px 6px;
  }

  .credit-pack.selected::after {
    width: 18px;
    height: 18px;
    font-size: 10px;
    top: 6px;
    right: 6px;
  }

  .pack-badge {
    font-size: 0.6rem;
    padding: 2px 5px;
    top: -7px;
  }

  .pack-credits {
    font-size: 0.85rem;
  }

  .pack-price {
    font-size: 1.1rem;
  }

  .pack-per {
    font-size: 0.6rem;
  }

  .credit-packs {
    margin-bottom: 24px;
  }

  .credit-packs-title {
    font-size: 1.125rem;
  }

  .credit-packs-subtitle {
    font-size: 0.8rem;
    margin-bottom: 16px;
  }

  /* Use Cases */
  .use-cases-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .use-case-card {
    padding: 16px 12px;
  }

  .use-case-icon {
    font-size: 1.75rem;
    margin-bottom: 10px;
  }

  .use-case-title {
    font-size: 0.9rem;
  }

  .use-case-desc {
    font-size: 0.8rem;
    display: none;
  }

  /* FAQ */
  .faq-section {
    padding: 24px 12px 32px;
  }

  .faq-question {
    padding: 14px 12px;
    font-size: 0.875rem;
  }

  .faq-answer p,
  .faq-answer-content {
    padding: 0 12px 14px;
    font-size: 0.8rem;
  }

  /* Footer */
  .site-footer {
    padding: 32px 12px 24px;
  }

  .footer-links {
    gap: 20px;
  }

  .footer-link-group h4 {
    font-size: 0.8rem;
  }

  .footer-link-group a {
    font-size: 0.8rem;
  }

  .footer-bottom {
    font-size: 0.75rem;
  }

  /* Presentations */
  .presentation-page {
    padding: 0;
  }

  .presentation-canvas {
    padding: 16px;
  }

  .slide-content-area {
    padding: 28px;
  }
  .footer-links {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .presentation-actions {
    flex-direction: column;
  }

  .presentation-actions .btn {
    width: 100%;
  }
}

/* ============================================
   Auth Modal
   ============================================ */

.auth-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.auth-modal[hidden] {
  display: none;
}

.auth-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
}

.auth-modal-container {
  position: relative;
  width: 100%;
  max-width: 900px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.auth-modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface-elevated);
  border-radius: 50%;
  color: var(--color-text-secondary);
  transition: var(--transition-fast);
  z-index: 10;
}

.auth-modal-close:hover {
  background: var(--color-border);
  color: var(--color-text);
}

.auth-modal-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.auth-form-side {
  padding: 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.auth-header {
  margin-bottom: 32px;
}

.auth-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 24px;
}

.auth-logo .logo-icon {
  font-size: 1.5rem;
}

.auth-header h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.auth-header p {
  color: var(--color-text-secondary);
}

.google-signin-btn {
  width: 100%;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: white;
  border: 1px solid #e0e0e0;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 500;
  color: #1f1f1f;
  cursor: pointer;
  transition: var(--transition-fast);
}

.google-signin-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.google-signin-btn svg {
  flex-shrink: 0;
}

.auth-terms {
  margin-top: 24px;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  text-align: center;
}

.auth-terms a {
  color: var(--color-primary-light);
}

.auth-terms a:hover {
  text-decoration: underline;
}

.auth-benefits-side {
  position: relative;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding: 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.auth-benefits-bg {
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.auth-benefits-content {
  position: relative;
  z-index: 1;
}

.auth-benefits-content h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
  margin-bottom: 32px;
}

.auth-benefit-list {
  margin-bottom: 40px;
}

.auth-benefit {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.9375rem;
}

.benefit-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  flex-shrink: 0;
}

.benefit-icon svg {
  width: 14px;
  height: 14px;
  stroke: white;
}

.auth-stats {
  display: flex;
  gap: 24px;
}

.auth-stat {
  text-align: center;
}

.auth-stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: white;
  margin-bottom: 4px;
}

.auth-stat-label {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.7);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Credits Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(12px);
}

.modal-overlay.active {
  display: flex;
  animation: overlayFadeIn 0.3s ease;
}

@keyframes overlayFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.credits-modal {
  position: relative;
  width: 100%;
  max-width: 400px;
  background: linear-gradient(165deg, #1e1e32 0%, #151522 100%);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 24px;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.05),
    0 25px 50px -12px rgba(0, 0, 0, 0.5),
    0 0 100px rgba(99, 102, 241, 0.15);
  padding: 0;
  text-align: center;
  animation: modalSlideIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.credits-modal .modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  border: none;
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  z-index: 10;
}

.credits-modal .modal-close:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text);
  transform: rotate(90deg);
}

.credits-modal-header {
  position: relative;
  padding: 40px 32px 20px;
  background: linear-gradient(180deg, rgba(99, 102, 241, 0.08) 0%, transparent 100%);
}

.credits-modal-glow {
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.3) 0%, transparent 70%);
  pointer-events: none;
}

.credits-modal-icon {
  position: relative;
  margin-bottom: 20px;
  animation: iconFloat 3s ease-in-out infinite;
}

@keyframes iconFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.credits-modal-icon svg {
  filter: drop-shadow(0 8px 16px rgba(99, 102, 241, 0.4));
}

.credits-modal-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.credits-modal-message {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  max-width: 280px;
  margin: 0 auto;
}

.credits-modal-actions {
  padding: 0 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.btn-checkout {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 16px 24px;
  background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  border: none;
  border-radius: 14px;
  font-size: 1rem;
  font-weight: 600;
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
}

.btn-checkout:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.45);
}

.btn-checkout:active {
  transform: translateY(0);
}

.btn-checkout .btn-text {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-checkout .btn-loading {
  display: none;
  align-items: center;
  gap: 10px;
}

.btn-checkout.loading .btn-text {
  display: none;
}

.btn-checkout.loading .btn-loading {
  display: flex;
}

.btn-checkout .btn-loading .spinner {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.btn-dismiss {
  width: 100%;
  padding: 14px 24px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-dismiss:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.12);
  color: var(--color-text);
}

.credits-modal-packs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.credits-modal-packs.credits-modal-packs-3 {
  grid-template-columns: repeat(3, 1fr);
  padding: 0 24px;
  margin-bottom: 16px;
}

.modal-pack {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  padding: 16px 8px 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 2px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
  color: inherit;
}

.modal-pack:hover {
  border-color: rgba(99, 102, 241, 0.5);
  background: rgba(99, 102, 241, 0.1);
  transform: translateY(-2px);
}

.modal-pack.selected {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(99, 102, 241, 0.1) 100%);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
}

.modal-pack.popular {
  border-color: rgba(99, 102, 241, 0.4);
}

.modal-pack-badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  padding: 3px 8px;
  background: var(--color-primary);
  border-radius: 10px;
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: white;
  white-space: nowrap;
}

.modal-pack-badge.best {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.modal-pack-credits {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.1;
}

.modal-pack-label {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.modal-pack-price {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary-light);
}

.modal-pack.selected .modal-pack-credits {
  color: var(--color-text);
}

.modal-pack.selected .modal-pack-price {
  color: #a5b4fc;
}

.credits-modal-summary {
  padding: 0 24px;
  margin: 0 0 16px;
}

.summary-breakdown {
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.15);
  border-radius: 12px;
  overflow: hidden;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.summary-row:last-child {
  border-bottom: none;
}

.summary-label {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.summary-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
}

.summary-value.price {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
}


.credits-modal-perks {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  padding: 0 24px 20px;
}

.credits-modal-perks .perk-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.credits-modal-perks .perk-item svg {
  color: #22c55e;
  flex-shrink: 0;
}

.credits-modal-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 24px;
  background: rgba(0, 0, 0, 0.2);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.credits-modal-footer svg {
  color: var(--color-text-muted);
}

.credits-modal-footer span {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

@media (max-width: 420px) {
  .credits-modal-packs {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .modal-pack {
    padding: 14px 6px 10px;
  }

  .modal-pack-credits {
    font-size: 1.25rem;
  }
}

@media (max-width: 768px) {
  .auth-modal-content {
    grid-template-columns: 1fr;
  }

  .auth-benefits-side {
    display: none;
  }

  .auth-form-side {
    padding: 32px 24px;
  }

  .credits-modal {
    max-width: calc(100vw - 32px);
    margin: 16px;
  }

  .credits-modal-header {
    padding: 32px 24px 20px;
  }

  .credits-modal-card {
    margin: 0 16px 20px;
    padding: 20px;
  }

  .credits-card-offer {
    gap: 8px;
  }

  .price-value,
  .credits-amount {
    font-size: 2.5rem;
  }

  .price-currency {
    font-size: 1.25rem;
    margin-top: 4px;
  }

  .credits-modal-actions {
    padding: 0 16px 20px;
  }

  .credits-modal-footer {
    padding: 14px 16px;
  }
}