/* ==========================================================================
   Black Myth: Wukong Guide - Global Stylesheet
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Reset & Base
   -------------------------------------------------------------------------- */
:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #1a1a1a;
  --accent-gold: #c9a84c;
  --accent-red: #8b2500;
  --text-primary: #e8e0d0;
  --text-secondary: #9a9080;
  --border-color: #2a2520;
  --gold-glow: 0 0 20px rgba(201, 168, 76, 0.15);
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', Helvetica, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--accent-gold);
  color: var(--bg-primary);
  padding: 0.5rem 1rem;
  border-radius: 0 0 4px 4px;
  font-weight: 600;
  z-index: 200;
  text-decoration: none;
}

.skip-link:focus {
  top: 0;
}

/* --------------------------------------------------------------------------
   2. Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: 'Cinzel', 'Noto Serif SC', Georgia, 'SimSun', 'Times New Roman', 'STSong', serif;
  color: var(--text-primary);
  line-height: 1.3;
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 1.8rem;
}

h3 {
  font-size: 1.3rem;
}

h4 {
  font-size: 1.1rem;
}

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

a:hover {
  color: #e0c06a;
}

ul, ol {
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.4rem;
}

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

/* --------------------------------------------------------------------------
   3. Navigation Bar (.navbar)
   -------------------------------------------------------------------------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  transition: box-shadow var(--transition-fast);
}

.navbar__logo {
  font-family: 'Cinzel', 'Noto Serif SC', Georgia, 'SimSun', 'Times New Roman', 'STSong', serif;
  color: var(--accent-gold);
  font-size: 1.3rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  padding-left: 0;
}

.navbar__links li {
  margin-bottom: 0;
}

.navbar__links a {
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

.navbar__links a:hover {
  color: var(--accent-gold);
}

.lang-toggle {
  display: flex;
  background-color: var(--bg-secondary);
  border-radius: 6px;
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.lang-toggle__btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 0.8rem;
  padding: 0.3rem 0.6rem;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  font-family: inherit;
}

.lang-toggle__btn:hover {
  background-color: rgba(201, 168, 76, 0.1);
  color: var(--accent-gold);
}

.lang-toggle__btn--active {
  background-color: var(--accent-gold);
  color: var(--bg-primary);
  font-weight: 600;
}

.lang-toggle__btn--active:hover {
  background-color: var(--accent-gold);
  color: var(--bg-primary);
}

.navbar__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  width: 32px;
  height: 32px;
}

.navbar__hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.navbar__hamburger--open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.navbar__hamburger--open span:nth-child(2) {
  opacity: 0;
}

.navbar__hamburger--open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 768px) {
  .navbar__hamburger {
    display: flex;
  }

  .navbar__links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: rgba(10, 10, 10, 0.98);
    padding: 1rem 2rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border-color);
  }

  .navbar__links.open {
    display: flex;
  }

  .navbar {
    padding: 0 1rem;
  }
}

/* --------------------------------------------------------------------------
   4. Footer (.footer)
   -------------------------------------------------------------------------- */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 2rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-top: 4rem;
}

.footer__disclaimer {
  font-size: 0.75rem;
  opacity: 0.7;
  margin-top: 0.5rem;
}

/* --------------------------------------------------------------------------
   5. Shared Components
   -------------------------------------------------------------------------- */
.divider {
  border: none;
  height: 1px;
  background: linear-gradient(
    to right,
    transparent,
    var(--accent-gold),
    transparent
  );
  margin: 2rem 0;
}

.card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--gold-glow);
}

.card__title {
  color: var(--accent-gold);
  font-size: 1.2rem;
  font-family: 'Cinzel', 'Noto Serif SC', Georgia, 'SimSun', 'Times New Roman', 'STSong', serif;
  margin-bottom: 0.5rem;
}

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

.stars {
  color: var(--accent-gold);
  letter-spacing: 2px;
}

.stars .empty {
  opacity: 0.3;
}

.tip-box {
  background-color: rgba(201, 168, 76, 0.08);
  border-left: 3px solid var(--accent-gold);
  padding: 1rem 1.25rem;
  border-radius: 0 6px 6px 0;
  margin: 1rem 0;
}

.section {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 2rem;
}

.section__title {
  text-align: center;
  position: relative;
  padding-bottom: 0.75rem;
  margin-bottom: 2rem;
}

.section__title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 2px;
  background: linear-gradient(to right, transparent, var(--accent-gold), transparent);
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

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

.breadcrumb a:hover {
  color: var(--accent-gold);
}

main {
  padding-top: 64px; /* offset for fixed navbar */
}

/* --------------------------------------------------------------------------
   6. Homepage
   -------------------------------------------------------------------------- */
.hero {
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(
    180deg,
    rgba(139, 37, 0, 0.25) 0%,
    var(--bg-primary) 100%
  );
  padding: 2rem;
}

.hero__title {
  font-size: 3.5rem;
  color: var(--accent-gold);
  margin-bottom: 1rem;
  font-family: 'Cinzel', 'Noto Serif SC', Georgia, 'SimSun', 'Times New Roman', 'STSong', serif;
}

.hero__subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 2rem;
}

.chapters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.bosses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.newbie-banner {
  background: linear-gradient(135deg, rgba(139, 37, 0, 0.15), rgba(201, 168, 76, 0.08));
  border: 1px solid var(--accent-gold);
  border-radius: 8px;
  padding: 2rem;
  text-align: center;
  margin: 2rem 0;
}

/* --------------------------------------------------------------------------
   7. Walkthrough Page
   -------------------------------------------------------------------------- */
.walkthrough-layout {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 2rem;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding: 2rem;
}

.toc-sidebar {
  position: sticky;
  top: 84px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
}

.toc-sidebar a {
  display: block;
  color: var(--text-secondary);
  padding: 0.3rem 0.6rem;
  font-size: 0.9rem;
  border-left: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.toc-sidebar a:hover,
.toc-sidebar a.active {
  color: var(--accent-gold);
  border-left-color: var(--accent-gold);
}

.toc-toggle {
  display: none;
}

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

  .toc-sidebar {
    display: none;
  }

  .toc-sidebar.open {
    display: block;
    position: static;
    margin-bottom: 1.5rem;
  }

  .toc-toggle {
    display: inline-block;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--accent-gold);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    margin-bottom: 1rem;
    font-family: inherit;
  }

  .toc-toggle:hover {
    background-color: rgba(201, 168, 76, 0.1);
  }
}

/* --------------------------------------------------------------------------
   8. Boss List Page
   -------------------------------------------------------------------------- */
.boss-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.boss-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  cursor: pointer;
}

.boss-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--gold-glow);
}

.boss-card__header {
  height: 160px;
  background: linear-gradient(135deg, rgba(139, 37, 0, 0.4), rgba(201, 168, 76, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
}

.boss-card__header span {
  font-size: 3rem;
  color: var(--accent-gold);
  font-family: 'Cinzel', 'Noto Serif SC', Georgia, 'SimSun', 'Times New Roman', 'STSong', serif;
}

.boss-card__body {
  padding: 1.2rem;
}

.boss-card__name {
  color: var(--accent-gold);
  font-size: 1.1rem;
  font-family: 'Cinzel', 'Noto Serif SC', Georgia, 'SimSun', 'Times New Roman', 'STSong', serif;
  margin-bottom: 0.3rem;
}

.boss-card__chapter {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

/* --------------------------------------------------------------------------
   9. Boss Detail Page
   -------------------------------------------------------------------------- */
.boss-detail {
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  padding: 2rem;
}

.boss-header {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 2rem;
}

.boss-header__portrait {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(139, 37, 0, 0.5), rgba(201, 168, 76, 0.15));
  border: 2px solid var(--accent-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.boss-header__portrait span {
  font-size: 3rem;
  color: var(--accent-gold);
  font-family: 'Cinzel', 'Noto Serif SC', Georgia, 'SimSun', 'Times New Roman', 'STSong', serif;
}

.boss-header__info {
  flex: 1;
  min-width: 200px;
}

.stats-card {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 2rem;
}

.stats-card__item {
  text-align: center;
}

.stats-card__label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.stats-card__value {
  font-size: 1.1rem;
  color: var(--accent-gold);
  font-weight: 600;
}

.stats-card__version {
  grid-column: 1 / -1;
  text-align: right;
  font-size: 0.75rem;
  color: var(--text-secondary);
  opacity: 0.6;
}

.phase-block {
  background-color: var(--bg-secondary);
  border-left: 3px solid var(--accent-gold);
  border-radius: 0 8px 8px 0;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.phase-block__title {
  color: var(--accent-gold);
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
  font-family: 'Cinzel', 'Noto Serif SC', Georgia, 'SimSun', 'Times New Roman', 'STSong', serif;
}

.quick-tips {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  margin: 1.5rem 0;
}

.quick-tips li {
  list-style: none;
  position: relative;
  padding-left: 1.25rem;
}

.quick-tips li::before {
  content: '\2726'; /* ✦ */
  position: absolute;
  left: 0;
  color: var(--accent-gold);
}