/* ===== VARIABLES ===== */
:root {
  --bg: #0b0b0c;
  --bg-rgb: 11, 11, 12;
  --surface: #151516;
  --surface-hover: #1f1f20;
  --primary: #4ade80;
  --primary-hover: #22c55e;
  --primary-rgb: 74, 222, 128;
  --text: #f3f4f6;
  --text-secondary: #9ca3af;
  --border: #27272a;
  --shadow: rgba(0,0,0,0.6);
  --radius: 12px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1200px;
}

[data-theme="light"] {
  --bg: #f8f9fa;
  --bg-rgb: 248, 249, 250;
  --surface: #ffffff;
  --surface-hover: #f3f4f6;
  --primary: #16a34a;
  --primary-hover: #15803d;
  --primary-rgb: 22, 163, 74;
  --text: #111827;
  --text-secondary: #6b7280;
  --border: #e5e7eb;
  --shadow: rgba(0,0,0,0.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background-color var(--transition), color var(--transition);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

/* ===== NAVBAR ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(var(--bg-rgb), 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand a {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), #a7f3d0);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.nav-links a {
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

.icon-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.icon-btn:hover {
  background: var(--surface-hover);
  transform: scale(1.05);
}

/* ===== CONTAINER & GRID ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5rem;
}

.section-header {
  margin-bottom: 1.5rem;
}

.section-header h2 {
  font-size: 1.75rem;
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
}

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, rgba(var(--primary-rgb),0.1), transparent);
  padding: 5rem 2rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  margin: 0 auto;
}

.hero-label {
  display: inline-block;
  background: var(--primary);
  color: #000;
  padding: 0.3rem 0.9rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-content h1 {
  font-size: 3rem;
  margin-bottom: 0.75rem;
  background: linear-gradient(to right, var(--text), var(--primary));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-content p {
  color: var(--text-secondary);
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
}

.btn-primary {
  background: var(--primary);
  color: #000;
  border: 1px solid var(--primary);
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 700;
  display: inline-block;
  transition: all var(--transition);
}

.btn-primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  transform: translateY(-2px);
}

/* ===== CARDS ===== */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
  position: relative;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 35px var(--shadow);
}

.card-image {
  aspect-ratio: 3/4;
  overflow: hidden;
  position: relative;
  background: var(--surface-hover);
}

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

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

.card-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--primary);
  color: #000;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
}

.card-content { padding: 1rem; }

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

/* ===== DETAIL PAGE ===== */
.detail-hero { position: relative; margin-bottom: 2rem; }

.detail-banner {
  height: 320px;
  background-size: cover;
  background-position: center;
  position: relative;
}

.detail-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 0%, var(--bg) 100%);
}

.detail-header {
  display: flex;
  gap: 2.5rem;
  margin-top: -120px;
  position: relative;
  z-index: 2;
  align-items: flex-end;
}

#detail-cover {
  width: 220px;
  border-radius: var(--radius);
  box-shadow: 0 15px 50px var(--shadow);
  border: 4px solid var(--surface);
  flex-shrink: 0;
  background: var(--surface-hover);
}

.detail-info { flex: 1; padding-bottom: 1rem; }

.detail-info h1 {
  font-size: 2.75rem;
  margin-bottom: 0.5rem;
  line-height: 1.2;
}

.detail-meta {
  display: flex;
  gap: 1.25rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.detail-genres {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.genre-tag {
  background: rgba(var(--primary-rgb), 0.15);
  color: var(--primary);
  padding: 0.3rem 0.85rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.detail-info p {
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 700px;
  font-size: 1.05rem;
}

/* ===== CHAPTERS LIST ===== */
.chapters-section { margin-top: 2rem; }
.chapters-section h2 { margin-bottom: 1.25rem; font-size: 1.5rem; }

.chapters-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.chapter-item {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1.1rem 1.5rem;
  border-radius: var(--radius);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition);
  cursor: pointer;
}

.chapter-item:hover {
  background: var(--surface-hover);
  border-color: var(--primary);
  transform: translateX(6px);
}

.chapter-info h3 {
  font-size: 1.05rem;
  margin-bottom: 0.2rem;
}

.chapter-info span {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.chapter-read-btn {
  background: var(--primary);
  color: #000;
  padding: 0.5rem 1.25rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.875rem;
  transition: background var(--transition);
}

.chapter-item:hover .chapter-read-btn { background: var(--primary-hover); }

/* ===== READER ===== */
.reader-page { background: var(--bg); }

.reader-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--surface);
  z-index: 200;
}

#progress-bar {
  height: 100%;
  background: var(--primary);
  width: 0%;
  transition: width 0.1s linear;
}

.reader-header {
  position: fixed;
  top: 3px;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(var(--bg-rgb), 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  padding: 0.9rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: transform var(--transition);
}

.reader-header.hidden { transform: translateY(-110%); }

.reader-title {
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.95rem;
}

.separator { color: var(--text-secondary); }

.reader-container {
  max-width: 950px;
  margin: 0 auto;
  padding: 70px 0 100px;
  min-height: 100vh;
}

.reader-container img {
  width: 100%;
  height: auto;
  display: block;
  background: var(--surface);
}

.reader-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(var(--bg-rgb), 0.95);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--border);
  padding: 1rem;
  display: flex;
  justify-content: center;
  gap: 1rem;
  transition: transform var(--transition);
  z-index: 100;
}

.reader-footer.hidden { transform: translateY(110%); }

.btn {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  font-family: inherit;
  transition: all var(--transition);
}

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

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* ===== FOOTER ===== */
.footer {
  text-align: center;
  padding: 3rem 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero-content h1 { font-size: 2rem; }
  .detail-header {
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-top: -60px;
  }
  #detail-cover { width: 160px; margin-top: -40px; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 1rem; }
  .reader-title { font-size: 0.8rem; max-width: 50%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .navbar { padding: 1rem; }
}