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

:root {
  --bg: #fafaf8;
  --text: #1a1a1a;
  --muted: #888;
  --border: #b4b4ae;
  --accent: #c8a882;
}

body {
  font-family: "Noto Sans TC", "PingFang TC", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background: linear-gradient(rgba(0,0,0,0.3), rgba(0,0,0,0.3)), url('images/網頁背景圖片.png') center center / cover no-repeat;
  will-change: transform;
}

/* ── Nav ── */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 3rem;
  border-bottom: 1px solid var(--border);
}

.logo {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-decoration: none;
  color: var(--text);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.9rem;
  transition: color 0.2s;
}

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

/* ── Hero ── */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 6rem 2rem;
  text-align: center;
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
  color: #fff;
}

.hero p {
  color: #fff;
  font-size: 1rem;
  line-height: 1.8;
  max-width: 400px;
  margin-bottom: 2.5rem;
}

.social-links {
  display: flex;
  gap: 1.5rem;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: var(--text);
  background: #fff;
  border: 1px solid #fff;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  transition: all 0.2s;
}

.social-links a:hover {
  background: var(--text);
  color: #fff;
  border-color: var(--text);
}

.hero-divider {
  width: 100%;
  max-width: 320px;
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.5rem 0;
}

/* ── Page nav (homepage) ── */
.page-nav {
  display: flex;
  gap: 1rem;
  margin-bottom: 0;
}

.page-nav-btn {
  text-decoration: none;
  background: #fff;
  cursor: pointer;
  font-family: inherit;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  padding: 0.7rem 2rem;
  border: 1px solid #fff;
  border-radius: 2rem;
  transition: all 0.2s;
}

.page-nav-btn:hover,
.page-nav-btn.active {
  background: var(--text);
  color: #fff;
  border-color: var(--text);
}

/* ── Works ── */
.page-header {
  padding: 3rem 3rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 0.05em;
}

/* 年份區塊 */
.year-section {
  padding: 2.5rem 3rem;
  border-bottom: 1px solid var(--border);
}

.year-label {
  font-size: 1.4rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: #fff;
  margin-bottom: 1.5rem;
  text-align: center;
}

/* ── Lightbox ── */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.lightbox.active {
  display: flex;
}

.lb-img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 2px;
}

.lb-close {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity 0.2s;
  line-height: 1;
  padding: 0.5rem;
}

.lb-close:hover {
  opacity: 1;
}

.lb-arrow {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  opacity: 0.6;
  transition: opacity 0.2s;
  padding: 1rem;
  line-height: 1;
}

.lb-arrow:hover {
  opacity: 1;
}

.lb-prev { left: 1rem; }
.lb-next { right: 1rem; }

/* ── Gallery Grid ── */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.gallery-item {
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: 4px;
  background: var(--border);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
  display: block;
}

.gallery-item:hover img {
  transform: scale(1.04);
}

.empty-state {
  color: var(--muted);
  font-size: 0.9rem;
  padding: 2rem 0;
}

/* ── Merchandise ── */
.merch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  padding: 2.5rem 3rem;
}

.merch-item {
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  background: #fff;
}

.merch-item img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
}

.merch-info {
  padding: 1rem;
}

.merch-info h3 {
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 0.3rem;
}

.merch-info p {
  font-size: 0.82rem;
  color: var(--muted);
}

/* ── Hover 浮出預覽 ── */
.img-preview-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  pointer-events: none;
  z-index: 499;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.img-preview-overlay.active {
  opacity: 1;
}

.img-preview {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 500;
  opacity: 0;
  transition: opacity 0.15s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}

.img-preview.active {
  opacity: 1;
}

.img-preview img {
  display: block;
  max-height: 90vh;
  max-width: 90vw;
  width: auto;
  height: auto;
  border-radius: 4px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

.img-preview-name {
  color: #fff;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-shadow: 0 1px 4px rgba(0,0,0,0.6);
}

/* ── Sub Nav (RD / RDOC / OTHER) ── */
.sub-nav {
  display: none;
  gap: 0.6rem;
  margin-top: 0.8rem;
}

.sub-nav.active {
  display: flex;
}

.sub-nav-btn {
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  padding: 0.35rem 1.1rem;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 2rem;
  color: rgba(255, 255, 255, 0.55);
  cursor: pointer;
  transition: all 0.2s;
}

.sub-nav-btn:hover,
.sub-nav-btn.active {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.75);
  color: #fff;
}

/* ── Short Comics ── */
.comics-section {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.year-section > .comics-section:first-child {
  border-top: none;
  margin-top: 0;
  padding-top: 0;
}

.year-section:last-child {
  border-bottom: none;
}

.comics-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.comic-card {
  width: 160px;
  cursor: pointer;
}

.comic-thumb {
  position: relative;
  aspect-ratio: 3/4;
  overflow: hidden;
  border-radius: 4px;
  background: var(--border);
}

.comic-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
  display: block;
}

.comic-card:hover .comic-thumb img {
  transform: scale(1.04);
}

.comic-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.45);
  color: #fff;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  opacity: 0;
  transition: opacity 0.2s;
}

.comic-card:hover .comic-play {
  opacity: 1;
}

.comic-title {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: #fff;
  text-align: center;
  letter-spacing: 0.05em;
}

.lb-page-num {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  pointer-events: none;
}

/* ── Footer ── */
footer {
  text-align: center;
  padding: 2rem;
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: 4rem;
}

/* ── RWD ── */
@media (max-width: 640px) {
  nav {
    padding: 1.2rem 1.5rem;
  }

  .nav-links {
    gap: 1.2rem;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .social-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .page-header,
  .year-section,
  .merch-grid {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}