/* ========================================
   ARCHIMEDIA - Shared Styles
   Techno-Renaissance Digital Library
   ======================================== */

/* CSS Variables */
:root {
  /* Colors */
  --bg-primary: #0a0a0a;
  --bg-secondary: #111213;
  --bg-card: #151617;
  --bg-elevated: #1a1b1d;

  --text-primary: #f5f5f5;
  --text-secondary: #b5b5b5;
  --text-muted: #7a7a7a;

  --accent-primary: #10b981;      /* Emerald green */
  --accent-secondary: #3b82f6;    /* Blue */
  --accent-tertiary: #f59e0b;     /* Amber/gold */

  --border-subtle: #1f2937;
  --border-accent: rgba(16, 185, 129, 0.4);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(16, 185, 129, 0.3);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Display', system-ui, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-serif: 'Iowan Old Style', 'Bookerly', Georgia, 'Times New Roman', serif;
  --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Monaco, Consolas, monospace;

  /* Spacing */
  --nav-height: 64px;
  --container-max: 1200px;
  --container-narrow: 800px;

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

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }

p {
  color: var(--text-secondary);
  max-width: 65ch;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--text-primary);
}

/* ========================================
   Navigation
   ======================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1rem, 4vw, 2rem);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.nav-logo img {
  height: 32px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 3vw, 2rem);
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  transition: width var(--transition-normal);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-auth {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-user-email {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Mobile Nav Toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.5rem;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-subtle);
    padding: 1rem;
    gap: 0.5rem;
  }

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

  .nav-toggle {
    display: block;
  }
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--accent-primary);
  color: #000;
}

.btn-primary:hover {
  background: #0ea472;
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background: var(--bg-card);
  border-color: var(--accent-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

/* ========================================
   Cards
   ======================================== */
.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.03), transparent);
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 1.5rem;
  transition: all var(--transition-normal);
}

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

.card-clickable {
  cursor: pointer;
}

/* ========================================
   Book/Product Cards (Kindle-style)
   ======================================== */
.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1.5rem;
  padding: 1rem 0;
}

.book-card {
  position: relative;
  aspect-ratio: 2/3;
  border-radius: 4px 12px 12px 4px;
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow:
    -4px 0 8px rgba(0,0,0,0.3),
    0 8px 24px rgba(0,0,0,0.4);
}

.book-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 16px;
  background: linear-gradient(90deg,
    rgba(0,0,0,0.4) 0%,
    rgba(0,0,0,0.1) 50%,
    transparent 100%
  );
  z-index: 2;
}

.book-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.book-card:hover {
  transform: translateY(-8px) rotateY(-5deg);
  box-shadow:
    -8px 4px 16px rgba(0,0,0,0.4),
    0 16px 48px rgba(0,0,0,0.5);
}

.book-card-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1rem;
  background: linear-gradient(transparent, rgba(0,0,0,0.9));
}

.book-card-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.book-card-author {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ========================================
   Gallery Cards (Thinkers)
   ======================================== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: clamp(1rem, 2vw, 1.5rem);
}

.gallery-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.gallery-card:hover {
  transform: translateY(-4px) scale(1.02);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-lg);
}

.gallery-card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  filter: grayscale(20%);
  transition: filter var(--transition-normal);
}

.gallery-card:hover img {
  filter: grayscale(0%);
}

.gallery-card-info {
  padding: 1rem;
  text-align: center;
}

.gallery-card-name {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.gallery-card-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ========================================
   YouTube-style Cards (Modern Thinkers)
   ======================================== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.video-card {
  cursor: pointer;
  transition: all var(--transition-normal);
}

.video-card:hover {
  transform: translateY(-4px);
}

.video-thumbnail {
  position: relative;
  aspect-ratio: 16/9;
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-card);
}

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

.video-thumbnail::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.3);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.video-card:hover .video-thumbnail::after {
  opacity: 1;
}

.video-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  background: rgba(255,255,255,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all var(--transition-fast);
}

.video-play-btn::before {
  content: '';
  width: 0;
  height: 0;
  border-left: 20px solid #000;
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
  margin-left: 4px;
}

.video-card:hover .video-play-btn {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1.1);
}

.video-info {
  display: flex;
  gap: 0.75rem;
  padding: 0.75rem 0;
}

.video-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.video-details {
  flex: 1;
}

.video-title {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ========================================
   Scroll Reader (Essays/Scrolls)
   ======================================== */
.scroll-reader {
  min-height: 100vh;
  padding-top: var(--nav-height);
}

.scroll-panel {
  min-height: 60vh;
  display: grid;
  place-items: center;
  padding: 8vh 8vw;
  opacity: 0.1;
  transform: scale(0.98);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.scroll-panel.visible {
  opacity: 1;
  transform: scale(1);
}

.scroll-panel-inner {
  max-width: var(--container-narrow);
  text-align: center;
}

.scroll-title {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.scroll-byline {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  color: var(--text-secondary);
  line-height: 1.5;
}

.scroll-image {
  width: 100%;
  max-width: 1000px;
  height: auto;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
}

/* ========================================
   Shop Cards
   ======================================== */
.shop-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 2rem;
}

.shop-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  overflow: hidden;
  transition: all var(--transition-normal);
}

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

.shop-card-image {
  aspect-ratio: 1;
  overflow: hidden;
}

.shop-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.shop-card:hover .shop-card-image img {
  transform: scale(1.05);
}

.shop-card-info {
  padding: 1.25rem;
}

.shop-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.shop-card-price {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-primary);
}

/* ========================================
   Container & Layout
   ======================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2rem);
}

.container-narrow {
  max-width: var(--container-narrow);
}

.page {
  padding-top: calc(var(--nav-height) + 2rem);
  padding-bottom: 4rem;
}

.page-header {
  text-align: center;
  margin-bottom: 3rem;
}

.page-title {
  margin-bottom: 0.5rem;
}

.page-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
}

.section {
  margin-bottom: 4rem;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 2rem;
  padding-top: calc(var(--nav-height) + 4rem);
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 3rem 0;
  margin-top: auto;
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
}

.footer-section h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ========================================
   Utilities
   ======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent-primary); }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.hidden { display: none !important; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ========================================
   Scrollbar Styling
   ======================================== */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-elevated);
  border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-subtle);
}