/* ============================================================
   猫岛雨香 - Cat Island Coastal Theme
   Cat Island Petrichor / Nekojima Ame Kaori
   Palette: feline-paw pinks + ocean-island blues on light coastal bg
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;600;700&family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

/* ========== CSS VARIABLES ========== */
:root {
  /* Coastal neutrals */
  --bg:            #faf6f0;
  --bg-warm:       #fdf9f5;
  --bg-card:       #ffffff;
  --bg-alt:        #f5f0e9;

  /* Ocean blues */
  --ocean-light:   #c5dde8;
  --ocean:         #7eb8c9;
  --ocean-mid:     #5a9bb5;
  --ocean-deep:    #3d7a94;
  --ocean-dark:    #2a5468;

  /* Feline paw pinks */
  --pink-pale:     #f5dce3;
  --pink-soft:     #e8a0b4;
  --pink-mid:      #d4788f;
  --pink-fierce:   #c2596f;
  --pink-dark:     #a03d52;

  /* Accent */
  --accent:        var(--pink-mid);
  --accent-hover:  var(--pink-fierce);
  --gold:          #c9a96e;
  --gold-light:    #e8d5a3;

  /* Text */
  --text:          #2d2a26;
  --text-soft:     #5c5750;
  --text-muted:    #8a837a;
  --text-light:    #b5aea5;

  /* Functional */
  --border:        #e0d8cf;
  --shadow:        0 2px 12px rgba(0,0,0,0.06);
  --shadow-lg:     0 4px 24px rgba(0,0,0,0.08);
  --radius:        12px;
  --radius-sm:     8px;
  --radius-lg:     16px;
  --header-h:      64px;

  /* Fonts */
  --font-serif:    'Noto Serif SC', 'SimSun', 'STSong', serif;
  --font-sans:     'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

/* ========== RESET ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
  min-height: 100vh;
}

/* Decorative cat-paw body background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  opacity: 0.03;
  background-image:
    radial-gradient(circle at 15% 25%, var(--pink-soft) 0px, transparent 2px),
    radial-gradient(circle at 85% 35%, var(--ocean) 0px, transparent 2px),
    radial-gradient(circle at 30% 70%, var(--pink-soft) 0px, transparent 1.5px),
    radial-gradient(circle at 70% 75%, var(--ocean) 0px, transparent 2px),
    radial-gradient(circle at 50% 50%, var(--gold-light) 0px, transparent 1px);
  background-size: 200px 200px, 180px 180px, 220px 220px, 190px 190px, 250px 250px;
}

/* ========== HEADER ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: linear-gradient(135deg, var(--ocean-dark), var(--ocean-deep));
  border-bottom: 3px solid var(--pink-soft);
  display: flex;
  align-items: center;
  box-shadow: 0 2px 16px rgba(42, 84, 104, 0.25);
}
.header-inner {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #fff;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

/* Cat ear silhouettes on logo */
.site-logo::before {
  content: '';
  display: inline-block;
  width: 32px;
  height: 32px;
  background: url('../img/favicon.png') center/contain no-repeat;
  border-radius: 4px;
}

/* Header Nav */
.header-nav { display: flex; align-items: center; gap: 28px; list-style: none; }
.header-nav a {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
  position: relative;
}
.header-nav a:hover, .header-nav a.active { color: var(--pink-soft); }
.header-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--pink-soft);
  transition: width 0.25s;
}
.header-nav a:hover::after, .header-nav a.active::after { width: 100%; }

/* Header CTA Button */
.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 22px;
  background: linear-gradient(135deg, var(--pink-mid), var(--pink-fierce));
  color: #fff;
  border-radius: 24px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 2px 10px rgba(194, 89, 111, 0.35);
}
.header-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(194, 89, 111, 0.5);
}

/* Mobile hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none; border: none;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

/* ========== HERO (page-specific backgrounds via classes) ========== */
.hero {
  position: relative;
  overflow: hidden;
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 0;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(42, 84, 104, 0.6) 0%,
    rgba(42, 84, 104, 0.45) 40%,
    rgba(42, 84, 104, 0.7) 100%
  );
}

/* Cat ear silhouette decorations in hero */
.hero::before {
  content: '';
  position: absolute;
  top: -30px;
  left: 10%;
  width: 60px;
  height: 60px;
  background: radial-gradient(ellipse at 50% 100%, var(--pink-pale) 0%, transparent 70%);
  border-radius: 50% 50% 0 0;
  opacity: 0.15;
  z-index: 1;
}
.hero::after {
  content: '';
  position: absolute;
  top: -20px;
  right: 15%;
  width: 50px;
  height: 50px;
  background: radial-gradient(ellipse at 50% 100%, var(--ocean-light) 0%, transparent 70%);
  border-radius: 50% 50% 0 0;
  opacity: 0.12;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
  padding: 60px 24px;
  max-width: 800px;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: 0.06em;
  text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.hero-subtitle {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}
.hero-tagline {
  font-size: 0.95rem;
  color: var(--pink-pale);
  opacity: 0.85;
  font-style: italic;
}

/* Per-page hero backgrounds */
.hero-home .hero-bg { background-image: url('../img/header.webp'); }
.hero-guide .hero-bg { background-image: url('../img/screenshot-02.webp'); }
.hero-story .hero-bg { background-image: url('../img/screenshot-01.webp'); }
.hero-characters .hero-bg { background-image: url('../img/screenshot-01.webp'); }
.hero-faq .hero-bg { background-image: url('../img/header.webp'); }

/* ========== MAIN LAYOUT ========== */
main { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ========== CONTENT SECTION ========== */
.content-section {
  padding: 60px 0;
  max-width: 900px;
  margin: 0 auto;
}
.content-section h2 {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}
.section-intro {
  font-size: 1.05rem;
  color: var(--text-soft);
  margin-bottom: 40px;
  max-width: 700px;
}

/* ========== CARDS ========== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin: 40px 0;
}
.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  border-left: 4px solid var(--pink-soft);
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.card-icon {
  font-size: 2rem;
  margin-bottom: 12px;
  display: block;
}
.card h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ocean-deep);
  margin-bottom: 8px;
}
.card p {
  font-size: 0.95rem;
  color: var(--text-soft);
  line-height: 1.7;
}

/* Game info cards */
.info-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin: 40px 0;
}
.info-card {
  background: var(--bg-warm);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  text-align: center;
  border: 1px solid var(--border);
}
.info-card .info-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}
.info-card .info-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ocean-deep);
}

/* ========== SCREENSHOT GALLERY ========== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
  margin: 40px 0;
}
.gallery-grid img {
  width: 100%;
  border-radius: var(--radius);
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.25s, box-shadow 0.25s;
}
.gallery-grid img:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-lg);
}

/* ========== CTA BANNER (index only) ========== */
.cta-banner {
  background: linear-gradient(135deg, var(--ocean-deep), var(--ocean-mid));
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  text-align: center;
  margin: 60px auto;
  max-width: 800px;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, var(--pink-soft) 0%, transparent 30%),
    radial-gradient(circle at 80% 20%, var(--gold-light) 0%, transparent 25%);
  opacity: 0.15;
}
.cta-banner h2 {
  color: #fff;
  font-family: var(--font-serif);
  font-size: 2rem;
  position: relative;
  z-index: 1;
}
.cta-banner p {
  color: rgba(255,255,255,0.8);
  font-size: 1.05rem;
  margin: 12px 0 28px;
  position: relative;
  z-index: 1;
}
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 40px;
  background: linear-gradient(135deg, var(--pink-mid), var(--pink-fierce));
  color: #fff;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.05em;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 16px rgba(194, 89, 111, 0.4);
  position: relative;
  z-index: 1;
}
.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(194, 89, 111, 0.55);
}

/* ========== REVIEW SECTION ========== */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
  margin: 40px 0;
}
.review-card {
  background: var(--bg-warm);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border);
  position: relative;
}
.review-card::before {
  content: '"';
  position: absolute;
  top: 8px;
  left: 16px;
  font-size: 4rem;
  font-family: var(--font-serif);
  color: var(--pink-pale);
  line-height: 1;
  opacity: 0.5;
}
.review-card p {
  font-style: italic;
  color: var(--text-soft);
  font-size: 0.95rem;
  margin-bottom: 12px;
  padding-top: 16px;
}
.review-author {
  font-weight: 600;
  color: var(--ocean-deep);
  font-size: 0.9rem;
}

/* ========== STEPS / GUIDE ========== */
.steps-list {
  list-style: none;
  counter-reset: step;
  margin: 40px 0;
}
.steps-list li {
  counter-increment: step;
  position: relative;
  padding: 20px 20px 20px 64px;
  margin-bottom: 24px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border-left: 4px solid var(--ocean);
  box-shadow: var(--shadow);
}
.steps-list li::before {
  content: counter(step);
  position: absolute;
  left: 16px;
  top: 20px;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--ocean-mid), var(--ocean-deep));
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
}
.steps-list li h3 {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--ocean-deep);
  margin-bottom: 6px;
  font-size: 1.15rem;
}
.steps-list li p {
  color: var(--text-soft);
  font-size: 0.95rem;
}

/* Tip box */
.tip-box {
  background: linear-gradient(135deg, var(--pink-pale), var(--bg-warm));
  border-left: 4px solid var(--pink-mid);
  border-radius: var(--radius-sm);
  padding: 18px 24px;
  margin: 24px 0;
}
.tip-box strong {
  color: var(--pink-fierce);
}
.tip-box p {
  color: var(--text-soft);
  font-size: 0.95rem;
  margin: 0;
}

/* ========== STORY PAGE ========== */
.chapter-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  border-left: 4px solid var(--pink-soft);
  box-shadow: var(--shadow);
}
.chapter-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--pink-dark);
  margin-bottom: 8px;
}
.chapter-card p {
  color: var(--text-soft);
  font-size: 0.95rem;
  line-height: 1.7;
}

.theme-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  margin: 40px 0;
}
.theme-item {
  background: var(--bg-warm);
  border-radius: var(--radius-sm);
  padding: 18px;
  text-align: center;
  border: 1px solid var(--border);
}
.theme-item .theme-icon {
  font-size: 1.8rem;
  display: block;
  margin-bottom: 8px;
}
.theme-item h4 {
  font-family: var(--font-serif);
  color: var(--ocean-deep);
  font-size: 1.05rem;
  margin-bottom: 4px;
}
.theme-item p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ========== CHARACTERS ========== */
.char-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
  margin: 40px 0;
}
.char-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform 0.25s;
}
.char-card:hover { transform: translateY(-3px); }
.char-header {
  padding: 24px 24px 12px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.char-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--pink-pale), var(--ocean-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  flex-shrink: 0;
}
.char-header h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ocean-deep);
}
.char-role {
  font-size: 0.85rem;
  color: var(--pink-mid);
  font-weight: 500;
}
.char-body { padding: 0 24px 24px; }
.char-body p { color: var(--text-soft); font-size: 0.95rem; margin-bottom: 12px; }
.char-traits {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}
.char-tag {
  background: var(--pink-pale);
  color: var(--pink-dark);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* ========== FAQ ACCORDION ========== */
.faq-list { margin: 40px 0; }
.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.faq-question {
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-weight: 600;
  color: var(--ocean-deep);
  font-size: 1.02rem;
  transition: background 0.2s;
  user-select: none;
}
.faq-question:hover { background: var(--bg-warm); }
.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--pink-soft);
  transition: transform 0.3s;
}
.faq-item.open .faq-question::after {
  content: '−';
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}
.faq-item.open .faq-answer {
  max-height: 600px;
  padding: 0 24px 18px;
}
.faq-answer p {
  color: var(--text-soft);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ========== SYSTEM REQUIREMENTS TABLE ========== */
.sys-reqs-table {
  width: 100%;
  border-collapse: collapse;
  margin: 40px 0;
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.sys-reqs-table th {
  background: linear-gradient(135deg, var(--ocean-deep), var(--ocean-mid));
  color: #fff;
  padding: 14px 20px;
  font-weight: 600;
  font-size: 0.95rem;
  text-align: left;
}
.sys-reqs-table td {
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  color: var(--text-soft);
  font-size: 0.9rem;
}
.sys-reqs-table tr:last-child td { border-bottom: none; }
.sys-reqs-table tr:nth-child(even) td { background: var(--bg-warm); }
.sys-reqs-table td:first-child {
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}
.sys-reqs-h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--ocean-deep);
  margin-top: 32px;
  margin-bottom: 12px;
}
.sys-reqs-h3:first-of-type { margin-top: 0; }

/* ========== UTILITY CLASSES ========== */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
.table-scroll { overflow-x: auto; }
.chapter-title { font-size: 1.25rem; }
.hero-tagline { font-style: italic; }

/* Content lists */
.content-list {
  list-style: disc;
  padding-left: 24px;
  margin: 16px 0;
}
.content-list-num {
  list-style: decimal;
  padding-left: 24px;
  margin: 16px 0;
}
.content-li { color: var(--text-soft); margin-bottom: 5px; font-size: 0.95rem; }
.content-li-sm { color: var(--text-soft); margin-bottom: 4px; font-size: 0.9rem; }
.content-li-md { color: var(--text-soft); margin-bottom: 8px; font-size: 0.95rem; }
.content-li-lg { color: var(--text-soft); margin-bottom: 10px; font-size: 1rem; }

/* Colored strong tags */
.strong-pink { color: var(--pink-fierce); }
.strong-red { color: #c0392b; }
.strong-gold { color: var(--gold); }
.strong-muted { color: var(--text-muted); }
.strong-navy { color: var(--ocean-deep); }

/* Table highlight */
.td-highlight { color: var(--pink-fierce); font-weight: 700; }

/* Guide intro / route */
.guide-intro { color: var(--text-soft); font-size: 1.02rem; margin-bottom: 20px; }
.route-desc { color: var(--text-soft); font-size: 0.95rem; margin-bottom: 16px; }
.route-heading {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--pink-dark);
  margin: 28px 0 12px;
}

/* Prose wrapper */
.prose { max-width: 800px; margin: 0 auto; }
.section-alt { background: var(--bg-alt); padding-top: 0; }

/* ========== LIGHTBOX ========== */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,0.85);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.lightbox.active { display: flex; }
.lightbox img {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: var(--radius);
  box-shadow: 0 4px 40px rgba(0,0,0,0.5);
}

/* ========== FOOTER ========== */
.site-footer {
  text-align: center;
  padding: 32px 24px;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  margin-top: 60px;
  background: var(--bg-warm);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  .header-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    background: var(--ocean-dark);
    padding: 16px 24px;
    gap: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  }
  .header-nav.open { display: flex; }
  .hamburger { display: flex; }
  .hero-title { font-size: 2rem; }
  .card-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .char-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .theme-grid { grid-template-columns: repeat(2, 1fr); }
  .info-card-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-banner { padding: 32px 20px; }
  .cta-banner h2 { font-size: 1.5rem; }
}
@media (max-width: 480px) {
  .hero-title { font-size: 1.6rem; }
  .hero-subtitle { font-size: 1rem; }
  .info-card-grid { grid-template-columns: 1fr; }
  .theme-grid { grid-template-columns: 1fr; }
  .content-section h2 { font-size: 1.6rem; }
}