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

/* ══════════════════════════════════════════
   DESIGN TOKENS
══════════════════════════════════════════ */
:root {
  --bg:        #fafaf8;
  --bg2:       #ffffff;
  --surface:   #f4f1ec;
  --text:      #1a1a1a;
  --text2:     #4a4a4a;
  --muted:     #888888;
  --accent:    #c0392b;
  --accent2:   #e74c3c;
  --gold:      #d4a843;
  --border:    #e8e4df;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.13);
  --radius:    12px;
  --radius-sm: 6px;
  --sans: 'Noto Sans TC', 'PingFang TC', 'Microsoft JhengHei', sans-serif;
  --serif: 'Noto Serif TC', 'PingFang TC', serif;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

/* ══════════════════════════════════════════
   STICKY HEADER
══════════════════════════════════════════ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5em;
  height: 56px;
  display: flex;
  align-items: center;
  gap: 1em;
  box-shadow: var(--shadow-sm);
}
.site-header a.home {
  font-family: var(--serif);
  font-size: 1.05em;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.03em;
  white-space: nowrap;
  transition: opacity var(--transition);
}
.site-header a.home:hover { opacity: 0.75; }
.site-header .breadcrumb {
  color: var(--muted);
  font-size: 0.82em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ══════════════════════════════════════════
   HERO SECTION
══════════════════════════════════════════ */
.index-hero {
  position: relative;
  background: linear-gradient(135deg, #1a1a2e 0%, #c0392b 50%, #e67e22 100%);
  color: #fff;
  padding: 5em 1.5em 4em;
  text-align: center;
  overflow: hidden;
}
.index-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(255,255,255,0.06) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(255,200,100,0.12) 0%, transparent 50%);
  pointer-events: none;
}
.index-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 60px;
  background: linear-gradient(to bottom, transparent, var(--bg));
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-block;
  font-size: 0.75em;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 20px;
  padding: 0.3em 1em;
  margin-bottom: 1em;
}
.index-hero h1 {
  font-family: var(--serif);
  font-size: 2.2em;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.5em;
  text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.hero-emoji { font-size: 1.1em; }
.index-hero p {
  font-size: 1em;
  opacity: 0.82;
  margin-bottom: 0.3em;
  letter-spacing: 0.05em;
}
.hero-divider {
  width: 40px;
  height: 2px;
  background: rgba(255,255,255,0.4);
  margin: 1em auto 0;
  border-radius: 2px;
}

/* ══════════════════════════════════════════
   YEAR FILTER BAR
══════════════════════════════════════════ */
.filter-bar {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 0.75em 1.5em;
  position: sticky;
  top: 56px;
  z-index: 90;
  overflow-x: auto;
  scrollbar-width: none;
}
.filter-bar::-webkit-scrollbar { display: none; }
.filter-inner {
  display: flex;
  align-items: center;
  gap: 0.5em;
  max-width: 960px;
  margin: 0 auto;
  white-space: nowrap;
}
.filter-label {
  font-size: 0.78em;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.08em;
  margin-right: 0.25em;
  text-transform: uppercase;
}
.filter-btn {
  font-family: var(--sans);
  font-size: 0.8em;
  font-weight: 500;
  padding: 0.35em 0.9em;
  border-radius: 20px;
  border: 1.5px solid var(--border);
  background: transparent;
  color: var(--text2);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.filter-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(192,57,43,0.3);
}

/* ══════════════════════════════════════════
   MAIN GRID
══════════════════════════════════════════ */
.index-main {
  max-width: 980px;
  margin: 0 auto;
  padding: 2em 1.25em 4em;
}

.section-title {
  font-family: var(--serif);
  font-size: 1.05em;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1.25em;
  padding-bottom: 0.5em;
  border-bottom: 1px solid var(--border);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1.5em;
}

/* ══════════════════════════════════════════
   CARD — MAGAZINE STYLE
══════════════════════════════════════════ */
.card {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg2);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  /* entrance animation */
  opacity: 0;
  transform: translateY(16px);
  animation: cardIn 0.45s var(--transition) forwards;
}
.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.card.hidden { display: none; }

/* stagger via nth-child */
.card:nth-child(1)  { animation-delay: 0.03s; }
.card:nth-child(2)  { animation-delay: 0.06s; }
.card:nth-child(3)  { animation-delay: 0.09s; }
.card:nth-child(4)  { animation-delay: 0.12s; }
.card:nth-child(5)  { animation-delay: 0.15s; }
.card:nth-child(6)  { animation-delay: 0.18s; }
.card:nth-child(7)  { animation-delay: 0.21s; }
.card:nth-child(8)  { animation-delay: 0.24s; }
.card:nth-child(9)  { animation-delay: 0.27s; }
.card:nth-child(10) { animation-delay: 0.30s; }
.card:nth-child(11) { animation-delay: 0.33s; }
.card:nth-child(12) { animation-delay: 0.36s; }

@keyframes cardIn {
  to { opacity: 1; transform: translateY(0); }
}

/* thumbnail wrapper for zoom effect */
.card-thumb-wrap {
  overflow: hidden;
  flex-shrink: 0;
  position: relative;
  height: 190px;
  background: var(--surface);
}
.card-thumb {
  width: 100%;
  height: 190px;
  object-fit: cover;
  display: block;
  transition: transform 0.45s cubic-bezier(0.4,0,0.2,1);
}
.card:hover .card-thumb { transform: scale(1.06); }

.card-thumb-placeholder {
  width: 100%;
  height: 190px;
  background: linear-gradient(135deg, var(--surface) 0%, #e8ddd0 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5em;
}

.card-body {
  padding: 1em 1.1em 1.1em;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.4em;
}
.card-date {
  font-size: 0.72em;
  color: var(--muted);
  letter-spacing: 0.05em;
  font-weight: 500;
}
.card-title {
  font-size: 0.92em;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
  transition: color var(--transition);
}
.card:hover .card-title { color: var(--accent); }

/* accent bar at bottom of card on hover */
.card::after {
  content: '';
  display: block;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--gold));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.card:hover::after { transform: scaleX(1); }

/* ══════════════════════════════════════════
   FOOTER
══════════════════════════════════════════ */
.site-footer {
  background: #1a1a1a;
  color: rgba(255,255,255,0.5);
  text-align: center;
  padding: 2em 1.5em;
  font-size: 0.82em;
  line-height: 1.8;
}
.site-footer a {
  color: rgba(255,255,255,0.6);
  text-decoration: none;
}
.site-footer a:hover { color: var(--gold); }
.site-footer .footer-logo {
  font-family: var(--serif);
  font-size: 1.1em;
  color: rgba(255,255,255,0.8);
  margin-bottom: 0.3em;
}

/* ══════════════════════════════════════════
   POST PAGE
══════════════════════════════════════════ */
.post-main {
  max-width: 760px;
  margin: 0 auto;
  padding: 2.5em 1.5em 5em;
}
.post-main h1 {
  font-family: var(--serif);
  font-size: 1.6em;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0.6em;
  color: var(--text);
}
.post-main h1::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--gold));
  border-radius: 2px;
  margin-top: 0.5em;
}
.post-meta {
  font-size: 0.82em;
  color: var(--muted);
  margin-bottom: 2.5em;
  display: flex;
  gap: 1.2em;
  flex-wrap: wrap;
  align-items: center;
}
.post-meta a { color: var(--muted); text-decoration: none; }
.post-meta a:hover { color: var(--accent); }

/* content */
.post-content { line-height: 1.95; font-size: 16px; color: var(--text2); }
.post-content p { margin-bottom: 1.1em; }
.post-content br + br { display: none; }
.post-content img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1em auto;
  border-radius: var(--radius-sm);
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: box-shadow var(--transition);
}
.post-content img:hover {
  box-shadow: var(--shadow-lg);
}
.post-content a { color: var(--accent); }
.post-content a:has(img) { display: block; }

/* prev/next */
.post-nav {
  margin-top: 3.5em;
  padding-top: 1.5em;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 1em;
  font-size: 0.88em;
}
.post-nav a {
  color: var(--accent);
  text-decoration: none;
  max-width: 45%;
  line-height: 1.5;
  font-weight: 500;
  transition: opacity var(--transition);
}
.post-nav a:hover { opacity: 0.7; text-decoration: underline; }
.post-nav .prev::before { content: "← "; }
.post-nav .next::after  { content: " →"; }
.post-nav .next { text-align: right; margin-left: auto; }



/* ══════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════ */
@media (max-width: 640px) {
  .index-hero h1 { font-size: 1.5em; }
  .index-hero   { padding: 3.5em 1em 3em; }
  .card-grid    { grid-template-columns: 1fr 1fr; gap: 0.85em; }
  .card-thumb-wrap, .card-thumb, .card-thumb-placeholder { height: 140px; }
  .card-body    { padding: 0.65em 0.75em 0.75em; }
  .card-title   { font-size: 0.82em; }
  .filter-bar   { padding: 0.6em 1em; }
  .post-main    { padding: 1.8em 1em 3.5em; }
  .post-main h1 { font-size: 1.3em; }
}
@media (max-width: 400px) {
  .card-grid { grid-template-columns: 1fr; }
}