/* ==========================================================================
   SORAS ACADEMY — DESIGN SYSTEM
   Designed & Built by Dheeraj
   Full Multi-Page Architecture, Mobile-First, SorasAI, Admin, Print/PDF & Payments
   ========================================================================== */

:root {
  /* Brand & Accent */
  --color-primary: #0066cc;
  --color-primary-focus: #0071e3;
  --color-primary-on-dark: #2997ff;
  --color-primary-rgb: 0, 102, 204;

  /* SorasAI Glow Gradients */
  --ai-glow-gradient: linear-gradient(135deg, #0071e3, #9b51e0, #ff2d55, #ff9500);
  --ai-pill-bg: rgba(0, 113, 227, 0.08);

  /* Light Canvas & Surfaces */
  --color-canvas: #ffffff;
  --color-canvas-parchment: #f5f5f7;
  --color-surface-pearl: #fafafc;
  --color-surface-card: #ffffff;
  --color-chip-translucent: rgba(210, 210, 215, 0.64);
  
  /* Text & Ink (Light Mode) */
  --color-ink: #1d1d1f;
  --color-body: #1d1d1f;
  --color-ink-muted-80: #333333;
  --color-ink-muted-48: #7a7a7a;
  --color-ink-muted-24: #a1a1a6;
  
  /* Borders & Dividers */
  --color-divider-soft: #f0f0f0;
  --color-hairline: #e0e0e0;
  --color-border-translucent: rgba(0, 0, 0, 0.08);

  /* Dark Canvas & Tiles */
  --color-surface-tile-1: #272729;
  --color-surface-tile-2: #2a2a2c;
  --color-surface-tile-3: #252527;
  --color-surface-black: #000000;
  --color-body-on-dark: #ffffff;
  --color-body-muted: #cccccc;

  /* Code Block Tokens */
  --code-bg: #1e1e24;
  --code-header-bg: #18181d;
  --code-text: #f0f0f5;
  --code-border: #33333a;
  --code-comment: #828a9b;
  --code-keyword: #ff7ab2;
  --code-string: #ff8170;
  --code-number: #daba61;
  --code-type: #6bdfff;
  --code-fn: #78c2b4;

  /* Typography */
  --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Inter", "Segoe UI", Roboto, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Inter", "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Monaco, "Cascadia Code", "Courier New", monospace;

  /* Radii Scale */
  --radius-xs: 5px;
  --radius-sm: 8px;
  --radius-md: 11px;
  --radius-lg: 18px;
  --radius-pill: 9999px;
  --radius-full: 9999px;

  /* Spacing Scale */
  --space-xxs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 17px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;
  --space-section: 80px;

  /* Shadows */
  --shadow-product: rgba(0, 0, 0, 0.22) 3px 5px 30px 0;
  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.06);
  --shadow-nav: 0 1px 0 rgba(0, 0, 0, 0.08);

  /* Navigation Heights */
  --global-nav-height: 44px;
  --sub-nav-height: 52px;
}

/* Dark Mode */
[data-theme="dark"] {
  --color-canvas: #000000;
  --color-canvas-parchment: #121214;
  --color-surface-pearl: #1c1c1e;
  --color-surface-card: #1c1c1e;
  --color-chip-translucent: rgba(60, 60, 65, 0.64);

  --color-ink: #f5f5f7;
  --color-body: #f5f5f7;
  --color-ink-muted-80: #e5e5ea;
  --color-ink-muted-48: #98989d;
  --color-ink-muted-24: #636366;

  --color-divider-soft: #2c2c2e;
  --color-hairline: #38383a;
  --color-border-translucent: rgba(255, 255, 255, 0.12);

  --color-surface-tile-1: #161618;
  --color-surface-tile-2: #1c1c1e;
  --color-surface-tile-3: #121214;
  --color-primary: #2997ff;
  --color-primary-focus: #0071e3;
  --color-primary-rgb: 41, 151, 255;
  --ai-pill-bg: rgba(41, 151, 255, 0.15);

  --code-bg: #0d0d11;
  --code-header-bg: #08080a;
  --code-border: #222228;
  --shadow-product: rgba(0, 0, 0, 0.6) 3px 5px 40px 0;
  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-nav: 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
  background-color: var(--color-canvas);
  color: var(--color-body);
}

body {
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.47;
  letter-spacing: -0.374px;
  background-color: var(--color-canvas);
  color: var(--color-body);
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

a:hover { text-decoration: underline; }

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

/* Navigation */
.global-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--global-nav-height);
  background-color: var(--color-surface-black);
  color: var(--color-body-on-dark);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.global-nav-inner {
  width: 100%;
  max-width: 1200px;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.2px;
  color: #ffffff;
}

.nav-logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: linear-gradient(135deg, #0066cc, #2997ff);
  color: #fff;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

.nav-link-item {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: -0.12px;
  color: #cccccc;
  transition: color 0.15s ease;
  cursor: pointer;
}

.nav-link-item:hover, .nav-link-item.active {
  color: #ffffff;
  text-decoration: none;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.sub-nav-frosted {
  position: fixed;
  top: var(--global-nav-height);
  left: 0; right: 0;
  height: var(--sub-nav-height);
  background-color: rgba(245, 245, 247, 0.82);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  z-index: 990;
  border-bottom: 1px solid var(--color-hairline);
  display: flex;
  align-items: center;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

[data-theme="dark"] .sub-nav-frosted {
  background-color: rgba(18, 18, 20, 0.82);
  border-bottom-color: var(--color-divider-soft);
}

.sub-nav-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sub-nav-title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.15px;
  color: var(--color-ink);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sub-nav-title a { color: var(--color-ink); }

.sub-nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background-color: var(--color-primary);
  color: #ffffff !important;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: -0.224px;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  transition: transform 0.12s ease, opacity 0.15s ease;
  white-space: nowrap;
  user-select: none;
}

.btn-primary:hover { opacity: 0.92; text-decoration: none; }
.btn-primary:active { transform: scale(0.95); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background-color: transparent;
  color: var(--color-primary) !important;
  border: 1px solid var(--color-primary);
  font-size: 14px;
  font-weight: 400;
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  transition: transform 0.12s ease, background-color 0.15s ease;
  white-space: nowrap;
  user-select: none;
}

.btn-secondary:hover { background-color: rgba(var(--color-primary-rgb), 0.08); text-decoration: none; }
.btn-secondary:active { transform: scale(0.95); }

.btn-utility {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background-color: var(--color-surface-pearl);
  color: var(--color-ink);
  border: 1px solid var(--color-hairline);
  font-size: 13px;
  font-weight: 400;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: transform 0.12s ease, background-color 0.15s ease;
  user-select: none;
}

.btn-utility:hover { background-color: var(--color-divider-soft); }
.btn-utility:active { transform: scale(0.95); }

.btn-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-chip-translucent);
  color: var(--color-ink);
  transition: transform 0.12s ease, background-color 0.15s ease;
  font-size: 16px;
}

.btn-icon:hover { background-color: var(--color-divider-soft); }
.btn-icon:active { transform: scale(0.92); }

.view-mode-toggle {
  display: inline-flex;
  background-color: rgba(0, 0, 0, 0.06);
  padding: 3px;
  border-radius: var(--radius-pill);
  gap: 2px;
}

[data-theme="dark"] .view-mode-toggle { background-color: rgba(255, 255, 255, 0.12); }

.toggle-option {
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 500;
  border-radius: var(--radius-pill);
  color: var(--color-ink-muted-80);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.toggle-option.active {
  background-color: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

/* SorasAI Floating Button & Drawer */
.ai-floating-trigger {
  position: fixed;
  bottom: 24px; right: 24px;
  z-index: 1500;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--radius-pill);
  background: var(--ai-glow-gradient);
  background-size: 200% 200%;
  animation: aiGradientShift 4s ease infinite;
  color: #ffffff !important;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.2px;
  box-shadow: 0 6px 24px rgba(0, 113, 227, 0.35);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease;
  user-select: none;
  cursor: pointer;
}

.ai-floating-trigger:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 30px rgba(155, 81, 224, 0.45);
  text-decoration: none;
}

.ai-floating-trigger:active { transform: scale(0.95); }

@keyframes aiGradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.ai-drawer-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  justify-content: flex-end;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.ai-drawer-overlay.open { opacity: 1; pointer-events: auto; }

.ai-drawer {
  width: 100%;
  max-width: 480px;
  height: 100%;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(25px);
  -webkit-backdrop-filter: saturate(180%) blur(25px);
  border-left: 1px solid var(--color-hairline);
  box-shadow: -8px 0 40px rgba(0, 0, 0, 0.15);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] .ai-drawer {
  background: rgba(24, 24, 28, 0.92);
  border-left-color: var(--color-divider-soft);
  box-shadow: -8px 0 40px rgba(0, 0, 0, 0.5);
}

.ai-drawer-overlay.open .ai-drawer { transform: translateX(0); }

.ai-drawer-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-hairline);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(245, 245, 247, 0.6);
}

[data-theme="dark"] .ai-drawer-header {
  background: rgba(18, 18, 20, 0.6);
  border-bottom-color: var(--color-divider-soft);
}

.ai-header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.ai-glow-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--ai-glow-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 14px;
}

.ai-header-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
}

.ai-drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.ai-welcome-box {
  background: var(--ai-pill-bg);
  border: 1px solid rgba(var(--color-primary-rgb), 0.15);
  border-radius: var(--radius-md);
  padding: 14px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-body);
}

.ai-suggested-prompts {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.ai-prompt-chip {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: var(--color-surface-pearl);
  border: 1px solid var(--color-hairline);
  font-size: 13px;
  color: var(--color-ink);
  text-align: left;
  transition: background-color 0.15s ease, transform 0.12s ease;
  cursor: pointer;
}

.ai-prompt-chip:hover { background: var(--color-divider-soft); transform: translateX(3px); }

.ai-message {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-width: 90%;
  animation: fadeIn 0.25s ease;
}

.ai-message.user { align-self: flex-end; }
.ai-message.assistant { align-self: flex-start; }

.ai-msg-bubble {
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 14.5px;
  line-height: 1.5;
}

.ai-message.user .ai-msg-bubble {
  background: var(--color-primary);
  color: #ffffff;
  border-bottom-right-radius: 2px;
}

.ai-message.assistant .ai-msg-bubble {
  background: var(--color-surface-pearl);
  border: 1px solid var(--color-hairline);
  color: var(--color-ink);
  border-bottom-left-radius: 2px;
}

.ai-drawer-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--color-hairline);
  background: rgba(245, 245, 247, 0.6);
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

[data-theme="dark"] .ai-drawer-footer {
  background: rgba(18, 18, 20, 0.6);
  border-top-color: var(--color-divider-soft);
}

.ai-input {
  flex: 1;
  min-height: 42px;
  max-height: 120px;
  padding: 10px 14px;
  background: var(--color-canvas);
  border: 1px solid var(--color-border-translucent);
  border-radius: var(--radius-lg);
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--color-ink);
  outline: none;
  resize: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.ai-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.15);
}

.ai-typing {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  background: var(--color-surface-pearl);
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-hairline);
  font-size: 12px;
  color: var(--color-ink-muted-48);
}

.typing-dot {
  width: 6px; height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
  animation: pulseDot 1.2s infinite ease-in-out;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes pulseDot {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

/* Payment & Checkout Modal */
.checkout-modal {
  width: 100%;
  max-width: 440px;
  margin: auto;
  background: var(--color-canvas);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-hairline);
  box-shadow: var(--shadow-product);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.checkout-modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-divider-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.checkout-modal-body {
  padding: 20px;
}

.checkout-summary-box {
  background: var(--color-surface-pearl);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  padding: 16px;
}

.payment-method-selector {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pay-method-pill {
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-hairline);
  background: var(--color-canvas);
  font-size: 13px;
  color: var(--color-ink);
  cursor: pointer;
  transition: all 0.15s ease;
}

.pay-method-pill.active {
  border-color: var(--color-primary);
  background: rgba(var(--color-primary-rgb), 0.06);
  font-weight: 600;
}

.checkout-modal-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--color-divider-soft);
  background: var(--color-canvas-parchment);
}

/* Main Shell & Resume Banner */
main {
  margin-top: calc(var(--global-nav-height) + var(--sub-nav-height));
  flex: 1;
  display: flex;
  flex-direction: column;
}

.resume-banner {
  background: var(--color-canvas-parchment);
  border-bottom: 1px solid var(--color-hairline);
  padding: var(--space-xs) var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--color-ink);
  animation: slideDown 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.resume-banner.hidden { display: none !important; }

.resume-banner-text {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.resume-tag {
  background: var(--color-primary);
  color: #fff;
  font-size: 10px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  text-transform: uppercase;
}

/* Hero Section */
.hero-section {
  padding: var(--space-section) var(--space-md) var(--space-xl);
  background: var(--color-canvas);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.hero-tag {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--color-primary);
}

.hero-headline {
  font-family: var(--font-display);
  font-size: 52px;
  font-weight: 600;
  line-height: 1.06;
  letter-spacing: -0.374px;
  color: var(--color-ink);
  max-width: 900px;
}

.hero-subhead {
  font-size: 21px;
  font-weight: 400;
  line-height: 1.4;
  color: var(--color-ink-muted-48);
  max-width: 720px;
}

.hero-actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-xs);
  flex-wrap: wrap;
  justify-content: center;
}

.metrics-bar {
  display: flex;
  gap: var(--space-xl);
  margin-top: var(--space-lg);
  padding: var(--space-md) var(--space-xl);
  background: var(--color-surface-pearl);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-pill);
}

.metric-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.metric-val {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-ink);
}

.metric-label {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--color-ink-muted-48);
  letter-spacing: 0.5px;
}

/* Master Course Showcase Card */
.course-featured-banner {
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-product);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-xl);
  align-items: center;
  margin-bottom: var(--space-xl);
}

@media (max-width: 840px) {
  .course-featured-banner { grid-template-columns: 1fr; }
}

.curriculum-section {
  padding: var(--space-xl) var(--space-md) var(--space-section);
  background: var(--color-canvas-parchment);
  flex: 1;
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.section-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-lg);
}

.module-nav-card {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-md);
  box-shadow: var(--shadow-subtle);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease;
  text-decoration: none;
  color: var(--color-body);
}

.module-nav-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.09);
  text-decoration: none;
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--color-primary);
  background: rgba(var(--color-primary-rgb), 0.1);
  padding: 3px 8px;
  border-radius: var(--radius-xs);
}

.card-time {
  font-size: 12px;
  color: var(--color-ink-muted-48);
}

.card-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-ink);
}

.card-desc {
  font-size: 14px;
  color: var(--color-ink-muted-48);
  line-height: 1.45;
}

.card-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--color-divider-soft);
  padding-top: var(--space-sm);
  font-size: 13px;
  color: var(--color-primary);
  font-weight: 500;
}

.search-input {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-hairline);
  background: var(--color-canvas);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 14px;
  outline: none;
}

.search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.15);
}

/* Module Deck Stage */
.module-page-container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md) var(--space-section);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 13px;
  color: var(--color-ink-muted-48);
}

.breadcrumbs a { color: var(--color-ink-muted-80); }

#deck-view-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.slide-item {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-product);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 580px;
}

.slide-header {
  padding: var(--space-md) var(--space-xl);
  background: var(--color-surface-pearl);
  border-bottom: 1px solid var(--color-divider-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.slide-body {
  padding: var(--space-xl);
  flex: 1;
  overflow-y: auto;
  max-height: 68vh;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.slide-title {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 600;
  line-height: 1.15;
  color: var(--color-ink);
}

.slide-subtitle {
  font-size: 18px;
  color: var(--color-ink-muted-48);
  margin-top: -6px;
}

.slide-content {
  font-size: 16.5px;
  line-height: 1.6;
  color: var(--color-body);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.module-deck-bar {
  background: rgba(245, 245, 247, 0.88);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-pill);
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-xs);
}

[data-theme="dark"] .module-deck-bar {
  background: rgba(18, 18, 20, 0.88);
  border-color: var(--color-divider-soft);
}

#docs-view-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.doc-section-card {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.doc-section-title {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  color: var(--color-ink);
}

.module-bottom-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-divider-soft);
  flex-wrap: wrap;
  gap: var(--space-md);
}

/* Code Blocks */
.code-window {
  background-color: var(--code-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--code-border);
  overflow: hidden;
  margin: var(--space-sm) 0;
  font-family: var(--font-mono);
}

.code-header {
  background-color: var(--code-header-bg);
  padding: 8px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--code-border);
}

.window-dots {
  display: flex;
  align-items: center;
  gap: 6px;
}

.window-dot { width: 11px; height: 11px; border-radius: 50%; }
.dot-red { background-color: #ff5f56; }
.dot-yellow { background-color: #ffbd2e; }
.dot-green { background-color: #27c93f; }

.code-filename { font-size: 12px; color: #9da5b4; }

.copy-btn {
  background-color: rgba(255, 255, 255, 0.08);
  color: #d1d5db;
  font-size: 11px;
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.copy-btn:hover {
  background-color: rgba(255, 255, 255, 0.16);
  color: #ffffff;
}

.code-pre {
  padding: var(--space-md);
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--code-text);
  tab-size: 4;
}

.callout {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-primary);
  background-color: rgba(var(--color-primary-rgb), 0.06);
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  margin: var(--space-sm) 0;
}

.callout-icon { font-size: 20px; line-height: 1; }
.callout-body { flex: 1; font-size: 15px; line-height: 1.5; }
.callout-title { font-weight: 600; color: var(--color-ink); margin-bottom: 2px; }
.callout-warning { border-left-color: #ff9500; background-color: rgba(255, 149, 0, 0.08); }
.callout-danger { border-left-color: #ff3b30; background-color: rgba(255, 59, 48, 0.08); }
.callout-tip { border-left-color: #34c759; background-color: rgba(52, 199, 89, 0.08); }

.apple-table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-hairline);
  margin: var(--space-md) 0;
}

.apple-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.apple-table th {
  background-color: var(--color-canvas-parchment);
  padding: 12px 16px;
  font-weight: 600;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-hairline);
}

.apple-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-divider-soft);
  color: var(--color-body);
}

.apple-table tr:last-child td { border-bottom: none; }

/* Print / PDF Engine */
@media print {
  body { background: #ffffff !important; color: #000000 !important; font-size: 12pt; line-height: 1.5; }
  .global-nav, .sub-nav-frosted, .resume-banner, .module-deck-bar,
  .ai-floating-trigger, .ai-drawer-overlay, .footer-apple,
  .btn-primary, .btn-secondary, .btn-utility, .copy-btn,
  .view-mode-toggle, .theme-toggle-btn, .pdf-controls-bar, .checkout-modal {
    display: none !important;
  }
  main { margin-top: 0 !important; padding: 0 !important; }
  .module-page-container, .pdf-book-container { max-width: 100% !important; padding: 0 !important; }
  .pdf-book-cover { page-break-after: always; height: 100vh; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; }
  .doc-section-card, .pdf-module-block { box-shadow: none !important; border: 1px solid #ddd !important; page-break-inside: avoid; margin-bottom: 20pt; padding: 15pt !important; }
  .code-window { background: #f8f9fa !important; color: #111 !important; border: 1px solid #ccc !important; page-break-inside: avoid; }
  .code-pre { color: #111 !important; }
  .apple-table th { background: #f0f0f0 !important; color: #000 !important; }
  h1, h2, h3 { page-break-after: avoid; color: #0066cc !important; }
}

/* Footer & Toast */
.footer-apple {
  background-color: var(--color-canvas-parchment);
  border-top: 1px solid var(--color-hairline);
  padding: var(--space-xxl) var(--space-md) var(--space-xl);
  font-size: 12px;
  color: var(--color-ink-muted-80);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-xl);
}

.footer-col-title { font-size: 13px; font-weight: 600; color: var(--color-ink); margin-bottom: var(--space-xs); }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-links a { color: var(--color-ink-muted-80); font-size: 12px; }
.footer-links a:hover { color: var(--color-primary); }

.footer-bottom {
  border-top: 1px solid var(--color-hairline);
  padding-top: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
  color: var(--color-ink-muted-48);
}

.toast-container {
  position: fixed;
  bottom: 24px; right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background-color: rgba(29, 29, 31, 0.92);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  color: #ffffff;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  gap: 8px;
  animation: toastIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: auto;
}

[data-theme="dark"] .toast { background-color: rgba(245, 245, 247, 0.92); color: #1d1d1f; }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(12px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero-headline { font-size: 34px; }
  .hero-subhead { font-size: 17px; }
  .metrics-bar { flex-direction: column; gap: var(--space-sm); padding: var(--space-md); border-radius: var(--radius-lg); }
  .modules-grid { grid-template-columns: 1fr; }
  .slide-item { min-height: 480px; }
  .slide-header { padding: var(--space-md); }
  .slide-body { padding: var(--space-md); max-height: 60vh; }
  .slide-title { font-size: 24px; }
  .slide-subtitle { font-size: 15px; }
  .doc-section-card { padding: var(--space-md); }
  .ai-drawer { max-width: 100%; }
  .ai-floating-trigger { bottom: 16px; right: 16px; padding: 10px 16px; font-size: 13px; }
}