/* ==========================================================================
   Z-Life AI: Google for Startups Presentation & Simulator
   Design System: Google Theme (Clean, Simple, Elegant, Light-First)
   Following Google Design Language (Material 3 / Google Workspace / Google AI)
   ========================================================================== */

:root {
  /* Google Brand Color Palette */
  --google-blue: #1a73e8;
  --google-blue-hover: #174ea6;
  --google-blue-surface: #e8f0fe;
  --google-blue-border: #aecbfa;

  --google-red: #ea4335;
  --google-red-hover: #d93025;
  --google-red-surface: #fce8e6;
  --google-red-border: #f28b82;

  --google-yellow: #f9ab00;
  --google-yellow-surface: #fef7e0;
  --google-yellow-border: #fdd663;

  --google-green: #34a853;
  --google-green-hover: #1e8e3e;
  --google-green-surface: #e6f4ea;
  --google-green-border: #81c995;

  /* Google Neutrals */
  --google-grey-900: #202124; /* Primary High-Contrast Text */
  --google-grey-800: #3c4043; /* Secondary Text / Headings */
  --google-grey-700: #5f6368; /* Body & Subtitle Text */
  --google-grey-500: #80868b; /* Captions / Icons */
  --google-grey-300: #dadce0; /* Hairline Borders */
  --google-grey-200: #e8eaed; /* Dividers */
  --google-grey-100: #f1f3f4; /* Subtle Surface Background */
  --google-grey-50:  #f8f9fa; /* Section Background */
  --google-white:    #ffffff; /* Main Canvas */

  /* Semantic Theme Mappings (Light-First Google Style) */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-card: #ffffff;
  --bg-surface: #f1f3f4;
  --border-subtle: #dadce0;
  --border-light: #e8eaed;

  --text-main: #202124;
  --text-muted: #5f6368;
  --text-dim: #80868b;

  --teal-primary: #1a73e8; /* Mapping old teal tokens to Google Blue for consistency */
  --coral-accent: #ea4335; /* Google Red */
  --amber-warmth: #f9ab00; /* Google Yellow */
  --indigo-ai: #1a73e8;    /* Google Blue */

  /* Elevation Shadows (Google Material Standards) */
  --shadow-xs: 0 1px 2px 0 rgba(60, 64, 67, 0.08);
  --shadow-sm: 0 1px 3px 0 rgba(60, 64, 67, 0.12), 0 1px 2px 0 rgba(60, 64, 67, 0.06);
  --shadow-md: 0 2px 6px 0 rgba(60, 64, 67, 0.15), 0 1px 2px 0 rgba(60, 64, 67, 0.1);
  --shadow-card: 0 1px 3px 0 rgba(60, 64, 67, 0.15), 0 2px 8px 1px rgba(60, 64, 67, 0.06);
  --shadow-hover: 0 4px 14px 0 rgba(60, 64, 67, 0.15), 0 1px 4px 0 rgba(60, 64, 67, 0.1);
  --shadow-modal: 0 8px 28px 0 rgba(60, 64, 67, 0.28);

  /* Radius (Google Rounded Geometric Standards) */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 9999px;

  /* Typography */
  --font-heading: 'Google Sans', 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* Optional Dark Mode (Crisp Google Dark Style) */
[data-theme="dark"] {
  --bg-primary: #1f1f1f;
  --bg-secondary: #282a2d;
  --bg-card: #2d2f31;
  --bg-surface: #35373b;
  --border-subtle: #444746;
  --border-light: #3c4043;

  --text-main: #e3e3e3;
  --text-muted: #c4c7c5;
  --text-dim: #8e918f;

  --google-blue-surface: rgba(138, 180, 248, 0.15);
  --google-red-surface: rgba(242, 139, 130, 0.15);
  --google-yellow-surface: rgba(253, 214, 99, 0.15);
  --google-green-surface: rgba(129, 201, 149, 0.15);

  --google-blue: #8ab4f8;
  --google-red: #f28b82;
  --google-yellow: #fdd663;
  --google-green: #81c995;

  --teal-primary: #8ab4f8;
  --coral-accent: #f28b82;
  --amber-warmth: #fdd663;
  --indigo-ai: #8ab4f8;

  --shadow-card: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 4px 14px 0 rgba(0, 0, 0, 0.5);
  --shadow-modal: 0 8px 32px 0 rgba(0, 0, 0, 0.6);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.25s ease, color 0.25s ease;
}

/* Google 4-Color Accent Strip at Very Top */
.google-stripe {
  height: 4px;
  width: 100%;
  display: flex;
  position: sticky;
  top: 0;
  z-index: 1001;
}

.google-stripe span:nth-child(1) { background-color: #1a73e8; flex: 1; }
.google-stripe span:nth-child(2) { background-color: #ea4335; flex: 1; }
.google-stripe span:nth-child(3) { background-color: #fbbc04; flex: 1; }
.google-stripe span:nth-child(4) { background-color: #34a853; flex: 1; }

/* Subtle Ambient Gradient (No heavy glowing blobs) */
.ambient-bg {
  display: none; /* Removed heavy dark glowing blobs for Google simplicity */
}

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography Standards */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-main);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.015em;
}

p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.65;
}

a {
  color: var(--google-blue);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  text-decoration: underline;
}

/* Google-Style Subtle Highlight Badges */
.badge-blue {
  background-color: var(--google-blue-surface);
  color: var(--google-blue);
}
.badge-red {
  background-color: var(--google-red-surface);
  color: var(--google-red);
}
.badge-yellow {
  background-color: var(--google-yellow-surface);
  color: var(--google-yellow);
}
.badge-green {
  background-color: var(--google-green-surface);
  color: var(--google-green);
}

/* ==========================================================================
   Navigation Bar (Google Style: Clean, White, Hairline Border)
   ========================================================================== */
.navbar {
  position: sticky;
  top: 4px;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

[data-theme="dark"] .navbar {
  background-color: rgba(31, 31, 31, 0.95);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none !important;
  flex-shrink: 0;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background-color: var(--google-blue-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  word-break: keep-all;
}

.brand-ai-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background-color: var(--google-blue-surface);
  color: var(--google-blue);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand-tagline {
  display: block;
  font-size: 0.75rem;
  color: var(--text-dim);
  font-weight: 500;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  list-style: none;
}

.nav-links li a {
  color: var(--text-muted);
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  padding: 6px 4px;
  position: relative;
  white-space: nowrap;
  transition: color 0.15s ease;
}

.nav-links li a:hover {
  color: var(--google-blue);
  text-decoration: none;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.btn-theme-toggle {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 16px;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.btn-theme-toggle:hover {
  background-color: var(--bg-surface);
}

/* ==========================================================================
   Google-Style Buttons
   ========================================================================== */
.btn-primary, .btn-google {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--google-blue);
  color: #ffffff !important;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none !important;
  box-shadow: var(--shadow-xs);
  transition: background-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.btn-primary:hover, .btn-google:hover {
  background-color: var(--google-blue-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.pitch-text-mobile {
  display: none !important;
}

.pitch-text-full {
  display: inline !important;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--bg-primary);
  color: var(--google-blue) !important;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  text-decoration: none !important;
  box-shadow: var(--shadow-xs);
  transition: background-color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

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

/* ==========================================================================
   Hero Section (Google Clean Presentation)
   ========================================================================== */
.hero-section {
  padding: 64px 0 54px;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-light);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--google-blue-surface);
  color: var(--google-blue);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 20px;
  border: 1px solid var(--google-blue-border);
}

.google-dots {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.g-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}
.g-dot.blue   { background-color: #1a73e8; }
.g-dot.red    { background-color: #ea4335; }
.g-dot.yellow { background-color: #fbbc04; }
.g-dot.green  { background-color: #34a853; }

.hero-content h1 {
  font-size: 2.85rem;
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 18px;
  color: var(--text-main);
}

.hero-content h1 .text-google-blue {
  color: var(--google-blue);
}

.hero-description {
  font-size: 1.12rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin-bottom: 28px;
  max-width: 580px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

/* Hero Metrics Strip (Clean Google 4-Box Layout) */
.hero-metrics-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
}

.metric-item {
  display: flex;
  flex-direction: column;
  padding: 12px 14px;
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.metric-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.metric-val {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 4px;
  color: var(--google-blue);
}

.metric-val.coral  { color: var(--google-red); }
.metric-val.amber  { color: var(--google-yellow); }
.metric-val.indigo { color: var(--google-green); }

.metric-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
  line-height: 1.3;
}

/* Hero Visual Card (Clean Google Product Frame) */
.hero-visual-card {
  position: relative;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.hero-image-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-bottom: 1px solid var(--border-light);
}

.hero-floating-card {
  padding: 16px 20px;
  background-color: var(--bg-card);
}

.hfc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.hfc-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--google-blue);
  display: flex;
  align-items: center;
  gap: 6px;
}

.hfc-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background-color: var(--google-green-surface);
  color: var(--google-green);
}

.hfc-body {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   Section Headers (Google Simplicity & Spacing)
   ========================================================================== */
section {
  padding: 72px 0;
  border-bottom: 1px solid var(--border-light);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background-color: var(--google-blue-surface);
  color: var(--google-blue);
  margin-bottom: 12px;
}

.section-tag.coral {
  background-color: var(--google-red-surface);
  color: var(--google-red);
}

.section-tag.amber {
  background-color: var(--google-yellow-surface);
  color: var(--google-yellow);
}

.section-tag.green {
  background-color: var(--google-green-surface);
  color: var(--google-green);
}

.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.25;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   Problem & Solution Cards (Google Comparison Cards)
   ========================================================================== */
.problem-solution-section {
  background-color: var(--bg-secondary);
}

.comparison-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.compare-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.compare-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.card-badge-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
}

.problem-card .card-badge-top {
  background-color: var(--google-red-surface);
  color: var(--google-red);
}

.solution-card .card-badge-top {
  background-color: var(--google-green-surface);
  color: var(--google-green);
}

.compare-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.compare-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.compare-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.compare-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.compare-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  flex-shrink: 0;
  background-color: var(--bg-surface);
}

.problem-card .compare-icon {
  background-color: var(--google-red-surface);
}

.solution-card .compare-icon {
  background-color: var(--google-green-surface);
}

.compare-text h4 {
  font-size: 0.98rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-main);
}

.compare-text p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   Dual-Role System (Parent & Teacher Google Cards)
   ========================================================================== */
.dual-role-section {
  background-color: var(--bg-primary);
}

.role-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.role-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.role-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.role-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.role-avatar-wrapper {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--google-blue-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.teacher-role .role-avatar-wrapper {
  background-color: var(--google-yellow-surface);
}

.pin-chip {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background-color: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
}

.role-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.role-subtitle {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.role-feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 24px;
}

.r-tag {
  font-size: 0.78rem;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background-color: var(--bg-surface);
  color: var(--text-muted);
  border: 1px solid var(--border-light);
}

.role-bullet-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: auto;
}

.role-bullet-list li {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.bullet-icon {
  color: var(--google-green);
  font-weight: 700;
  flex-shrink: 0;
}

/* ==========================================================================
   AI Spotlight Section (Google Clean 3-Pillar Grid)
   ========================================================================== */
.ai-spotlight-section {
  background-color: var(--bg-secondary);
}

.ai-spotlight-banner {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-card);
  margin-bottom: 36px;
  box-shadow: var(--shadow-sm);
}

.ai-spotlight-img {
  width: 100%;
  max-height: 380px;
  object-fit: cover;
  display: block;
}

.ai-pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.ai-pillar-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.ai-pillar-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.pillar-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--google-blue-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 18px;
}

.ai-pillar-card:nth-child(2) .pillar-icon-box {
  background-color: var(--google-green-surface);
}

.ai-pillar-card:nth-child(3) .pillar-icon-box {
  background-color: var(--google-yellow-surface);
}

.pillar-title {
  font-size: 1.12rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}

.pillar-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ==========================================================================
   Live Gemini Simulator (Google AI Studio Inspired)
   ========================================================================== */
.simulator-section {
  background-color: var(--bg-primary);
}

.sim-container {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.sim-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
  gap: 16px;
}

.sim-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sim-status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--google-green);
  box-shadow: 0 0 0 3px var(--google-green-surface);
}

.sim-model-tag {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--google-blue);
  background-color: var(--google-blue-surface);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}

.scenario-chips-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.sc-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

.sc-chip {
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
}

.sc-chip:hover {
  border-color: var(--google-blue);
  color: var(--google-blue);
}

.sc-chip.active {
  background-color: var(--google-blue);
  color: #ffffff;
  border-color: var(--google-blue);
  font-weight: 600;
  box-shadow: var(--shadow-xs);
}

.sim-workspace {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  min-height: 540px;
}

.sim-input-col {
  padding: 28px;
  border-right: 1px solid var(--border-subtle);
  background-color: var(--bg-primary);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sim-col-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}

.sim-form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sim-field-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
}

.sim-range-val {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--google-blue);
  font-weight: 600;
}

.sim-slider {
  width: 100%;
  accent-color: var(--google-blue);
  cursor: pointer;
  height: 6px;
  background-color: var(--bg-surface);
  border-radius: var(--radius-pill);
}

.sim-toggle-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.sim-tag-toggle {
  font-size: 0.8rem;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
  transition: all 0.15s ease;
}

.sim-tag-toggle:hover {
  background-color: var(--bg-surface);
  color: var(--text-main);
}

.sim-tag-toggle.selected {
  background-color: var(--google-blue-surface);
  border-color: var(--google-blue-border);
  color: var(--google-blue);
  font-weight: 600;
}

.sim-tag-toggle.selected.coral {
  background-color: var(--google-red-surface);
  border-color: var(--google-red-border);
  color: var(--google-red);
}

.sim-tag-toggle.selected.amber {
  background-color: var(--google-yellow-surface);
  border-color: var(--google-yellow-border);
  color: var(--google-yellow);
}

.sim-notes-input {
  width: 100%;
  height: 72px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-secondary);
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 0.85rem;
  line-height: 1.4;
  resize: vertical;
  transition: border-color 0.15s ease;
}

.sim-notes-input:focus {
  outline: none;
  border-color: var(--google-blue);
  background-color: var(--bg-card);
}

.sim-run-btn-wrapper {
  margin-top: auto;
  padding-top: 12px;
}

.btn-run-ai {
  width: 100%;
  padding: 12px;
  background-color: var(--google-blue);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: background-color 0.15s ease, box-shadow 0.15s ease;
}

.btn-run-ai:hover:not(:disabled) {
  background-color: var(--google-blue-hover);
  box-shadow: var(--shadow-md);
}

.btn-run-ai:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* Right Column: AI Output */
.sim-output-col {
  padding: 28px;
  background-color: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
}

.ai-loading-state {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 14px;
  text-align: center;
}

.ai-loading-state.active {
  display: flex;
}

.spinner-orb {
  width: 40px;
  height: 40px;
  border: 3px solid var(--google-blue-surface);
  border-top-color: var(--google-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.ai-output-box {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.ai-card-result {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  box-shadow: var(--shadow-xs);
}

.ai-card-result.urgent {
  border-left: 4px solid var(--google-red);
}

.ai-card-result.plan {
  border-left: 4px solid var(--google-green);
}

.ai-card-result.teacher {
  border-left: 4px solid var(--google-yellow);
}

.ai-card-result.correlation {
  border-left: 4px solid var(--google-blue);
}

.aic-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
  flex-wrap: wrap;
  gap: 8px;
}

.aic-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

.badge-risk-high {
  background-color: var(--google-red-surface);
  color: var(--google-red);
}

.badge-risk-med {
  background-color: var(--google-yellow-surface);
  color: var(--google-yellow);
}

.badge-risk-low {
  background-color: var(--google-green-surface);
  color: var(--google-green);
}

.aic-content {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.aic-bullet-list {
  padding-left: 18px;
  margin-top: 6px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.aic-bullet-list li {
  color: var(--text-muted);
}

/* ==========================================================================
   Interactive Diagrams & Tabs (Google Material Tabs)
   ========================================================================== */
.workflow-section {
  background-color: var(--bg-secondary);
}

.diag-tabs-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 2px;
  flex-wrap: wrap;
}

.diag-tab-btn {
  background: transparent;
  border: none;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 12px 20px;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}

.diag-tab-btn:hover {
  color: var(--google-blue);
}

.diag-tab-btn.active {
  color: var(--google-blue);
  border-bottom-color: var(--google-blue);
}

.diag-panel {
  display: none;
}

.diag-panel.active {
  display: block;
}

/* 24-Hour Loop Cards */
.loop-steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.loop-step-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  position: relative;
}

.step-num-badge {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--google-blue);
  margin-bottom: 12px;
}

.step-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}

.step-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Tech Spec Grid */
.tech-spec-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.tech-spec-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.tech-spec-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.tech-icon {
  font-size: 24px;
}

.tech-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
}

.tech-spec-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* SOS Ladder Grid */
.sos-ladder-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}

.sos-ladder-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
  box-shadow: var(--shadow-xs);
  transition: transform 0.15s ease;
}

.sos-ladder-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.sos-step-num {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--google-blue);
  margin-bottom: 8px;
}

.sos-icon {
  font-size: 28px;
  margin-bottom: 8px;
}

.sos-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}

.sos-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ==========================================================================
   Google Synergy Section (Why Google for Startups)
   ========================================================================== */
.google-synergy-section {
  background-color: var(--bg-primary);
}

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

.synergy-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  border-top: 4px solid var(--google-blue);
}

.synergy-card.green {
  border-top-color: var(--google-green);
}

.synergy-card.yellow {
  border-top-color: var(--google-yellow);
}

.synergy-icon {
  font-size: 28px;
  margin-bottom: 16px;
}

.synergy-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-main);
}

.synergy-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   Non-Profit Mission & Founder Profile (Google.org Spirit)
   ========================================================================== */
.non-profit-section {
  background-color: var(--bg-secondary);
}

.np-pledge-banner {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 36px;
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--google-red);
}

.np-pledge-icon {
  font-size: 36px;
  flex-shrink: 0;
}

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

.np-pledge-text p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.np-pillars-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

.np-pillar-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  box-shadow: var(--shadow-xs);
}

.npp-icon {
  font-size: 26px;
  margin-bottom: 12px;
}

.npp-title {
  font-size: 1.02rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}

.npp-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Founder Profile Card (Authentic & Clean) */
.founder-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 36px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 36px;
  align-items: center;
  box-shadow: var(--shadow-card);
}

.founder-media {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.founder-photo-wrapper {
  position: relative;
  width: 140px;
  height: 140px;
  margin-bottom: 16px;
}

.founder-photo-img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--google-blue-surface);
}

.founder-photo-badge {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--google-blue);
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
}

.founder-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.founder-role-title {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.founder-contact-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
}

.btn-linkedin, .btn-email, .btn-github {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  text-decoration: none !important;
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  background-color: var(--bg-surface);
  transition: all 0.15s ease;
}

.btn-linkedin:hover {
  background-color: #0077b5;
  color: #ffffff;
  border-color: #0077b5;
}

.btn-email:hover {
  background-color: var(--google-blue);
  color: #ffffff;
  border-color: var(--google-blue);
}

.btn-github:hover {
  background-color: #24292e;
  color: #ffffff;
  border-color: #24292e;
}

[data-theme="dark"] .btn-github:hover {
  background-color: #f0f6fc;
  color: #1f2328;
  border-color: #f0f6fc;
}

.founder-quote-box {
  margin-bottom: 20px;
}

.founder-quote {
  font-size: 1.08rem;
  font-style: italic;
  color: var(--text-main);
  line-height: 1.7;
  position: relative;
  border-left: 3px solid var(--google-blue);
  padding-left: 20px;
}

/* ==========================================================================
   Call To Action Banner
   ========================================================================== */
.cta-banner-section {
  background-color: var(--bg-primary);
  text-align: center;
  padding: 80px 0;
}

.pitch-banner-card {
  max-width: 800px;
  margin: 0 auto;
}

.pitch-banner-title {
  font-size: 2.3rem;
  font-weight: 700;
  margin: 12px 0 16px;
}

.pitch-banner-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 28px;
  line-height: 1.6;
}

.pitch-banner-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* ==========================================================================
   Modal Dialog (Google Docs / Material Dialog Style)
   ========================================================================== */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(32, 33, 36, 0.6);
  backdrop-filter: blur(4px);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background-color: var(--bg-card);
  border-radius: var(--radius-xl);
  max-width: 760px;
  width: 100%;
  max-height: 88vh;
  overflow-y: auto;
  position: relative;
  box-shadow: var(--shadow-modal);
  border: 1px solid var(--border-subtle);
  padding: 40px;
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.modal-close-btn:hover {
  background-color: var(--google-red-surface);
  color: var(--google-red);
}

.modal-pitch-body h2 {
  font-size: 1.85rem;
  margin-bottom: 8px;
}

.modal-pitch-body h3 {
  font-size: 1.2rem;
  margin: 24px 0 8px;
  color: var(--google-blue);
}

.modal-pitch-body p {
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 12px;
}

.modal-pitch-body ul {
  padding-left: 20px;
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.modal-pitch-body li {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Toast Notification */
.copy-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--google-grey-900);
  color: #ffffff;
  padding: 12px 20px;
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: all 0.25s ease;
  z-index: 3000;
}

.copy-toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Footer (Google Clean Minimalist Standard)
   ========================================================================== */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 44px 0 36px;
  text-align: center;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--text-dim);
  max-width: 680px;
  line-height: 1.5;
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .hero-content h1 {
    font-size: 2.3rem;
  }
  .sim-workspace {
    grid-template-columns: 1fr;
  }
  .sim-input-col {
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
  }
  .loop-steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .sos-ladder-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .ai-pillars-grid, .synergy-grid, .tech-spec-grid {
    grid-template-columns: 1fr;
  }
  .founder-card {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .founder-quote {
    border-left: none;
    border-top: 2px solid var(--google-blue);
    padding-left: 0;
    padding-top: 14px;
  }
}

/* ==========================================================================
   Mobile-Only Visibility Utility Classes
   ========================================================================== */
.show-on-mobile-only {
  display: none !important;
}

@media (max-width: 768px) {
  .hide-on-mobile {
    display: none !important;
  }
  .show-on-mobile-only {
    display: block !important;
  }

  /* Tighter, modern compact mobile padding */
  .hero-section {
    padding: 28px 0 20px;
  }
  .problem-solution-section,
  .dual-role-section,
  .ai-spotlight-section,
  .simulator-section,
  .workflow-section,
  .google-synergy-section,
  .non-profit-section,
  .open-source-section,
  .cta-banner-section {
    padding: 36px 0;
  }

  /* ==========================================================================
     Top Header & Navigation (Ultra-Clean, Perfectly Aligned on Mobile)
     ========================================================================== */
  .navbar {
    height: 56px;
    padding: 0;
  }

  .nav-inner {
    height: 56px;
    padding: 0 12px;
    gap: 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: nowrap;
    width: 100%;
  }

  .nav-links {
    display: none;
  }

  /* Left: Brand / Logo */
  .brand-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
  }

  .brand-icon {
    width: 32px;
    height: 32px;
    font-size: 18px;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
  }

  .brand-text {
    display: flex;
    align-items: center;
  }

  .brand-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-main);
    display: inline-flex;
    align-items: center;
    gap: 0;
    white-space: nowrap;
  }

  /* Hide subtitle and extra badges on mobile to keep navbar ultra-clean */
  .brand-ai-badge {
    display: none !important;
  }

  .brand-tagline {
    display: none !important;
  }

  /* Right: Actions Toolbar */
  .nav-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
    margin-left: auto;
  }

  /* 1. GitHub Button: Circular Icon Button */
  .btn-nav-github {
    width: 34px !important;
    height: 34px !important;
    min-width: 34px !important;
    padding: 0 !important;
    border-radius: 50% !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    flex-shrink: 0 !important;
    box-sizing: border-box;
  }

  .btn-nav-github svg {
    width: 17px !important;
    height: 17px !important;
  }

  .nav-github-text {
    display: none !important;
  }

  /* 2. Theme Toggle Switch: Circular Icon Button */
  .btn-theme-toggle {
    width: 34px !important;
    height: 34px !important;
    min-width: 34px !important;
    font-size: 14px !important;
    padding: 0 !important;
    border-radius: 50% !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    flex-shrink: 0 !important;
    box-sizing: border-box;
  }

  /* 3. Blue Button: Sleek Pill Button */
  .btn-primary#openPitchModalBtn {
    height: 34px !important;
    padding: 0 12px !important;
    font-size: 0.8rem !important;
    font-weight: 700 !important;
    border-radius: var(--radius-pill) !important;
    white-space: nowrap !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    flex-shrink: 0 !important;
    box-shadow: none !important;
    letter-spacing: 0.2px;
  }

  .pitch-text-full {
    display: none !important;
  }

  .pitch-text-mobile {
    display: inline !important;
  }

  .section-header {
    margin-bottom: 20px;
  }
  .section-tag {
    font-size: 0.72rem;
    padding: 3px 10px;
    margin-bottom: 8px;
  }
  .section-title {
    font-size: 1.55rem;
    line-height: 1.25;
    margin-bottom: 8px;
  }
  .section-subtitle {
    font-size: 0.88rem;
    line-height: 1.5;
  }

  /* Hero Section */
  .hero-content h1 {
    font-size: 1.95rem;
    line-height: 1.22;
    margin-bottom: 12px;
  }
  .hero-description {
    font-size: 0.92rem;
    line-height: 1.5;
    margin-bottom: 18px;
  }
  .hero-cta-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
  }
  .hero-cta-group a,
  .hero-cta-group button {
    width: 100%;
    justify-content: center;
    padding: 10px 16px;
    font-size: 0.88rem;
  }
  .hero-image-img {
    max-height: 220px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    width: 100%;
  }
  .hero-visual-card {
    margin-top: 8px;
  }
  .hero-metrics-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    padding: 10px 12px;
    margin-top: 18px;
  }
  .metric-item {
    padding: 4px;
  }
  .metric-item .metric-val {
    font-size: 1.25rem;
  }
  .metric-item .metric-label {
    font-size: 0.72rem;
  }

  /* Cards & Grids */
  .comparison-grid, .role-grid, .np-pillars-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .compare-card, .role-card {
    padding: 20px 16px;
    border-radius: var(--radius-lg);
  }
  .compare-title, .role-title {
    font-size: 1.2rem;
  }
  .compare-item {
    gap: 10px;
    margin-bottom: 12px;
  }
  .compare-text h4 {
    font-size: 0.9rem;
    margin-bottom: 2px;
  }
  .compare-text p {
    font-size: 0.82rem;
    line-height: 1.45;
  }
  .role-bullet-list {
    gap: 10px;
  }
  .role-bullet-list li {
    font-size: 0.82rem;
    line-height: 1.45;
  }

  /* Simulator Section */
  .sim-workspace {
    border-radius: var(--radius-lg);
  }
  .sim-input-col {
    padding: 18px 16px;
  }
  .sim-output-col {
    padding: 18px 16px;
  }
  .scenario-btn-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .scenario-btn {
    padding: 8px 12px;
  }

  /* AI Pillars */
  .ai-pillars-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .ai-pillar-card {
    padding: 18px 16px;
  }
  .sos-ladder-grid {
    grid-template-columns: 1fr;
  }

  /* Non-Profit & Founder */
  .np-pledge-banner {
    padding: 18px 16px;
    border-radius: var(--radius-lg);
    gap: 12px;
  }
  .np-pledge-text h3 {
    font-size: 1.15rem;
  }
  .np-pledge-text p {
    font-size: 0.84rem;
    line-height: 1.5;
  }
  .founder-card {
    padding: 22px 16px;
    gap: 18px;
    border-radius: var(--radius-lg);
  }
  .founder-quote {
    font-size: 0.92rem;
    line-height: 1.55;
  }
  .founder-contact-actions {
    flex-direction: column;
    gap: 8px;
    width: 100%;
  }
  .founder-contact-actions a {
    width: 100%;
  }

  /* Open Source */
  .repo-showcase-card {
    padding: 20px 16px;
    border-radius: var(--radius-lg);
    margin-top: 16px;
  }
  .repo-name {
    font-size: 1.25rem;
  }
  .repo-desc {
    font-size: 0.84rem;
    line-height: 1.45;
  }
  .repo-clone-box {
    padding: 12px 14px;
    margin: 16px 0 14px;
  }
  .clone-code {
    font-size: 0.82rem;
  }
  .btn-copy-clone {
    padding: 5px 10px;
    font-size: 0.78rem;
  }

  /* CTA Banner */
  .pitch-banner-card {
    padding: 0 10px;
  }
  .pitch-banner-title {
    font-size: 1.55rem;
    line-height: 1.25;
  }
  .pitch-banner-subtitle {
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 18px;
  }
  .pitch-banner-actions {
    flex-direction: column;
    gap: 8px;
    width: 100%;
  }
  .pitch-banner-actions a,
  .pitch-banner-actions button {
    width: 100%;
    justify-content: center;
  }
  .modal-content {
    padding: 20px 18px;
  }
}

/* ==========================================================================
   Open Source & GitHub Showcase Section
   ========================================================================== */
.open-source-section {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  padding: 80px 0;
}

.repo-showcase-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 36px;
  box-shadow: var(--shadow-card);
  margin-top: 28px;
}

.repo-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  flex-wrap: wrap;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}

.repo-title-block {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  max-width: 680px;
}

.repo-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  flex-shrink: 0;
}

.repo-badge-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.repo-status-pill {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background-color: var(--google-green-surface);
  color: var(--google-green);
  border: 1px solid var(--google-green-border);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

.repo-license-pill {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background-color: var(--google-blue-surface);
  color: var(--google-blue);
  border: 1px solid var(--google-blue-border);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

.repo-name {
  font-size: 1.45rem;
  font-weight: 800;
  margin: 0 0 6px 0;
}

.repo-name a {
  color: var(--text-main);
  text-decoration: none;
  transition: color 0.15s ease;
}

.repo-name a:hover {
  color: var(--google-blue);
  text-decoration: underline;
}

.repo-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin: 0;
}

.repo-action-buttons {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.btn-repo-star, .btn-repo-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none !important;
}

/* Terminal Clone Box */
.repo-clone-box {
  background-color: #1e1e1e;
  border-radius: var(--radius-md);
  padding: 14px 18px;
  margin: 24px 0 20px;
  border: 1px solid #333333;
}

.clone-box-label {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}
.terminal-dot.red { background-color: #ff5f56; }
.terminal-dot.yellow { background-color: #ffbd2e; }
.terminal-dot.green { background-color: #27c93f; }

.clone-box-title {
  font-size: 0.76rem;
  color: #888888;
  font-family: var(--font-mono);
  font-weight: 600;
  margin-left: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.clone-command-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.clone-code {
  color: #58a6ff;
  font-family: var(--font-mono);
  font-size: 0.96rem;
  font-weight: 500;
  word-break: break-all;
  user-select: all;
}

.btn-copy-clone {
  background-color: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.btn-copy-clone:hover {
  background-color: rgba(255, 255, 255, 0.22);
}

.btn-copy-clone.copied {
  background-color: #238636 !important;
  border-color: #2ea043 !important;
  color: #ffffff !important;
}

/* Feature Pills Grid */
.repo-highlights-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 24px;
}

.repo-feature-pill {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.rf-icon {
  font-size: 1.4rem;
  flex-shrink: 0;
}

.repo-feature-pill strong {
  display: block;
  font-size: 0.88rem;
  color: var(--text-main);
  margin-bottom: 2px;
}

.repo-feature-pill span {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Quickstart 3 steps */
.repo-quickstart {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
}

.quickstart-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 0 0 14px 0;
}

.quickstart-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.qs-step {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.qs-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--google-blue);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.qs-step strong {
  display: block;
  font-size: 0.84rem;
  color: var(--text-main);
  margin-bottom: 4px;
}

.qs-step span, .qs-step code {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.qs-step code {
  background-color: rgba(0, 0, 0, 0.05);
  padding: 1px 4px;
  border-radius: 4px;
  color: var(--text-main);
  font-family: var(--font-mono);
  display: inline-block;
  margin-top: 2px;
}

[data-theme="dark"] .qs-step code {
  background-color: rgba(255, 255, 255, 0.1);
}

/* Nav & Hero GitHub Buttons */
.btn-nav-github {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  font-size: 0.84rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  background-color: var(--bg-surface);
  text-decoration: none !important;
  transition: all 0.15s ease;
}

.btn-nav-github:hover {
  background-color: #24292e;
  color: #ffffff;
  border-color: #24292e;
}

[data-theme="dark"] .btn-nav-github:hover {
  background-color: #f0f6fc;
  color: #1f2328;
  border-color: #f0f6fc;
}

.btn-github-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 0.94rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  background-color: var(--bg-card);
  text-decoration: none !important;
  box-shadow: var(--shadow-sm);
  transition: all 0.15s ease;
}

.btn-github-pill:hover {
  background-color: #24292e;
  color: #ffffff;
  border-color: #24292e;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

[data-theme="dark"] .btn-github-pill:hover {
  background-color: #f0f6fc;
  color: #1f2328;
  border-color: #f0f6fc;
}

@media (max-width: 992px) {
  .repo-highlights-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .quickstart-steps {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .repo-highlights-grid {
    grid-template-columns: 1fr;
  }
  .repo-header-row {
    flex-direction: column;
  }
  .repo-action-buttons {
    width: 100%;
  }
  .btn-repo-star, .btn-repo-download {
    flex: 1;
    justify-content: center;
  }
  .nav-github-text {
    display: none;
  }
}