/* ═══════════════════════════════════════════════
   AI News Digest — Style
   ═══════════════════════════════════════════════ */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Dark theme (default) */
  --bg: #0a0a0f;
  --bg-gradient: radial-gradient(ellipse at 20% 0%, rgba(124, 108, 240, 0.06) 0%, transparent 50%),
                 radial-gradient(ellipse at 80% 100%, rgba(0, 164, 239, 0.04) 0%, transparent 50%),
                 var(--bg);
  --bg-card: rgba(18, 18, 26, 0.8);
  --bg-card-hover: rgba(26, 26, 38, 0.9);
  --bg-filter: rgba(22, 22, 31, 0.9);
  --bg-filter-active: #1e1e2e;
  --border: rgba(30, 30, 46, 0.8);
  --border-hover: rgba(60, 60, 90, 0.6);
  --text: #e0e0e8;
  --text-muted: #8888a0;
  --text-dim: #555568;
  --accent: #7c6cf0;
  --accent-soft: #6a5ad4;
  --accent-glow: rgba(124, 108, 240, 0.15);
  --accent-glow-strong: rgba(124, 108, 240, 0.25);
  --microsoft: #00a4ef;
  --anthropic: #d4a574;
  --openai: #10a37f;
  --google: #ea4335;
  --microsoft-bg: rgba(0, 164, 239, 0.08);
  --anthropic-bg: rgba(212, 165, 116, 0.08);
  --openai-bg: rgba(16, 163, 127, 0.08);
  --google-bg: rgba(234, 67, 53, 0.08);
  --shadow: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-hover: 0 8px 32px rgba(0,0,0,0.45), 0 2px 8px rgba(0,0,0,0.3);
  --shadow-card: 0 1px 2px rgba(0,0,0,0.2), 0 0 0 1px rgba(255,255,255,0.02) inset;
  --header-bg: rgba(10, 10, 15, 0.75);
  --radius: 12px;
  --radius-sm: 8px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --bg: #f8f9fc;
  --bg-gradient: radial-gradient(ellipse at 30% 0%, rgba(108, 92, 231, 0.05) 0%, transparent 50%),
                 radial-gradient(ellipse at 80% 80%, rgba(0, 164, 239, 0.03) 0%, transparent 50%),
                 linear-gradient(180deg, #f0f1f8 0%, #f8f9fc 50%);
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  --bg-filter: rgba(240, 240, 248, 0.9);
  --bg-filter-active: #e4e4f0;
  --border: rgba(200, 200, 220, 0.5);
  --border-hover: rgba(160, 160, 190, 0.5);
  --text: #1a1a2e;
  --text-muted: #555570;
  --text-dim: #8888a0;
  --accent: #6c5ce7;
  --accent-soft: #7b6bf0;
  --accent-glow: rgba(108, 92, 231, 0.1);
  --accent-glow-strong: rgba(108, 92, 231, 0.18);
  --microsoft-bg: rgba(0, 164, 239, 0.07);
  --anthropic-bg: rgba(212, 165, 116, 0.07);
  --openai-bg: rgba(16, 163, 127, 0.07);
  --google-bg: rgba(234, 67, 53, 0.07);
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.1), 0 4px 12px rgba(0,0,0,0.06);
  --shadow-card: 0 1px 3px rgba(0,0,0,0.05), 0 1px 0 rgba(255,255,255,0.8) inset;
  --header-bg: rgba(248, 249, 252, 0.8);
}

html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg-gradient);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { text-decoration: underline; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.8rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}
.site-logo:hover { text-decoration: none; color: var(--accent); }

.logo-dots {
  display: flex;
  gap: 3px;
}
.logo-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.logo-dots span:nth-child(1) { background: var(--microsoft); }
.logo-dots span:nth-child(2) { background: var(--anthropic); }
.logo-dots span:nth-child(3) { background: var(--openai); }
.logo-dots span:nth-child(4) { background: var(--google); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.lang-switcher {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.lang-btn {
  background: none;
  border: none;
  border-right: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.4rem 0.55rem;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
  line-height: 1;
}
.lang-btn:last-child { border-right: none; }
.lang-btn:hover { color: var(--text); background: var(--bg-filter); }
.lang-btn.active {
  color: var(--accent);
  background: var(--accent-glow);
  font-weight: 600;
}

.theme-switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 26px;
  cursor: pointer;
  flex-shrink: 0;
}
.theme-switch input { opacity: 0; width: 0; height: 0; position: absolute; }
.theme-slider {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #90caf9, #b0bec5);
  border-radius: 26px;
  transition: background 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 1px 3px rgba(0,0,0,0.15) inset;
}
.theme-slider::before {
  content: '';
  position: absolute;
  left: 3px;
  top: 3px;
  width: 20px;
  height: 20px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), background 0.3s;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}
.theme-switch input:checked ~ .theme-slider {
  background: linear-gradient(135deg, #2d2b55, #3d3b65);
}
.theme-switch input:checked ~ .theme-slider::before {
  transform: translateX(22px);
  background: #fdd835;
  box-shadow: 0 0 8px rgba(253, 216, 53, 0.4), 0 1px 4px rgba(0,0,0,0.2);
}
[data-theme="light"] .lang-btn { color: #444460; }
[data-theme="light"] .lang-btn.active { color: #6c5ce7; }

/* ---------- Main Layout ---------- */
.main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

/* ---------- Hero ---------- */
.hero {
  text-align: center;
  padding: 2rem 0 2.5rem;
}

.hero h1 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto;
}

.hero-repo {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.75rem;
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-filter);
  transition: all var(--transition);
  text-decoration: none;
}
.hero-repo:hover {
  color: var(--text);
  border-color: var(--border-hover);
  text-decoration: none;
}

/* ---------- Stats Bar ---------- */
.stats-bar {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
  margin: 1.5rem 0 2rem;
  padding: 1rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.stat {
  text-align: center;
}

.stat-val {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent);
}

.stat-lbl {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ---------- Trend Chart ---------- */
.trend-section {
  margin-bottom: 2rem;
}

.trend-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--font-mono);
  margin-bottom: 0.75rem;
}

.trend-chart-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1rem 0.8rem;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  position: relative;
  height: 220px;
}

@media (max-width: 640px) {
  .trend-chart-wrap { height: 180px; padding: 0.8rem 0.5rem 0.6rem; }
}

/* ---------- Controls ---------- */
.controls {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.secondary-controls {
  display: flex;
  gap: 0.9rem;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.filter-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.45rem 1rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-filter);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  white-space: nowrap;
}
.filter-btn:hover {
  border-color: var(--border-hover);
  color: var(--text);
}
.filter-btn.active {
  background: var(--bg-filter-active);
  border-color: var(--accent);
  color: var(--text);
  box-shadow: 0 0 0 2px var(--accent-glow), 0 2px 8px var(--accent-glow);
}
.filter-btn .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.filter-btn .count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-left: 0.2rem;
}
.filter-btn.active .count { color: var(--text-muted); }

.filter-btn[data-cat="all"] .dot { background: var(--accent); }
.filter-btn[data-cat="github"] .dot { background: var(--microsoft); }
.filter-btn[data-cat="anthropic"] .dot { background: var(--anthropic); }
.filter-btn[data-cat="openai"] .dot { background: var(--openai); }
.filter-btn[data-cat="google"] .dot { background: var(--google); }

.type-filter-row {
  gap: 0.4rem;
}
.type-btn {
  appearance: none;
  -webkit-appearance: none;
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-filter);
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  white-space: nowrap;
  font-family: var(--font);
  line-height: 1.4;
}
.type-btn:hover {
  border-color: var(--border-hover);
  color: var(--text);
}
.type-btn.active {
  background: var(--bg-filter-active);
  border-color: var(--accent);
  color: var(--text);
  box-shadow: 0 0 0 2px var(--accent-glow);
}
.type-btn .count {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-left: 0.15rem;
}
.type-btn.active .count { color: var(--text-muted); }

.search-box {
  position: relative;
  flex: 1 1 320px;
}
.search-box svg {
  position: absolute;
  left: 0.8rem;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  stroke: var(--text-dim);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.search-input {
  width: 100%;
  max-width: 400px;
  padding: 0.55rem 0.8rem 0.55rem 2.4rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-filter);
  color: var(--text);
  font-size: 0.9rem;
  font-family: var(--font);
  outline: none;
  transition: all var(--transition);
}
.search-input::placeholder { color: var(--text-dim); }
.search-input:focus { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-glow); }

.month-filter {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.2rem 0;
  color: var(--text-muted);
}

.month-filter-label {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.month-select {
  min-width: 150px;
  padding: 0.55rem 2rem 0.55rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-filter);
  color: var(--text);
  font-size: 0.88rem;
  font-family: var(--font);
  outline: none;
  transition: all var(--transition);
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--text-dim) 50%),
    linear-gradient(135deg, var(--text-dim) 50%, transparent 50%);
  background-position:
    calc(100% - 18px) calc(50% - 3px),
    calc(100% - 12px) calc(50% - 3px);
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}

.month-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

/* ---------- Date Group ---------- */
.date-group {
  margin-bottom: 2rem;
}

.date-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-family: var(--font-mono);
  padding-bottom: 0.5rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.date-label::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}
.date-label .day-count {
  font-weight: 400;
  color: var(--text-dim);
}

/* ---------- Card ---------- */
.card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid transparent;
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  margin-bottom: 0.6rem;
  transition: all var(--transition);
  text-decoration: none;
  color: var(--text);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
  text-decoration: none;
  transform: translateY(-2px);
}
.card[data-cat="github"] { border-left-color: var(--microsoft); }
.card[data-cat="anthropic"] { border-left-color: var(--anthropic); }
.card[data-cat="openai"] { border-left-color: var(--openai); }
.card[data-cat="google"] { border-left-color: var(--google); }

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.4rem;
}

.card-cat {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  white-space: nowrap;
}
.card-cat[data-cat="github"] { color: var(--microsoft); background: var(--microsoft-bg); }
.card-cat[data-cat="anthropic"] { color: var(--anthropic); background: var(--anthropic-bg); }
.card-cat[data-cat="openai"] { color: var(--openai); background: var(--openai-bg); }
.card-cat[data-cat="google"] { color: var(--google); background: var(--google-bg); }

.card-source {
  font-size: 0.72rem;
  color: var(--text-dim);
  white-space: nowrap;
}

.card-source-meta {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.source-type-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.14rem 0.45rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-filter);
  color: var(--text-muted);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 0.35rem;
}

.card-summary {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-tags {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.tag {
  font-size: 0.7rem;
  padding: 0.18rem 0.55rem;
  border-radius: 999px;
  background: var(--bg-filter);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-family: var(--font-mono);
  transition: all var(--transition);
}
.card:hover .tag {
  border-color: var(--border-hover);
  color: var(--text-muted);
}

/* ---------- Empty State ---------- */
.empty-state {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--text-dim);
}
.empty-state svg {
  width: 48px;
  height: 48px;
  stroke: var(--text-dim);
  fill: none;
  stroke-width: 1.5;
  margin-bottom: 1rem;
}
.empty-state p {
  font-size: 0.95rem;
}

/* ---------- Footer ---------- */
.site-footer {
  text-align: center;
  padding: 2.5rem 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.8rem;
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.site-footer a { color: var(--text-muted); }

/* ---------- Fade-in animation ---------- */
.card {
  animation: fadeUp 0.35s cubic-bezier(0.4, 0, 0.2, 1) both;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Category hover glow ---------- */
.card[data-cat="github"]:hover { box-shadow: var(--shadow-hover), 0 0 0 1px rgba(0, 164, 239, 0.1); }
.card[data-cat="anthropic"]:hover { box-shadow: var(--shadow-hover), 0 0 0 1px rgba(212, 165, 116, 0.1); }
.card[data-cat="openai"]:hover { box-shadow: var(--shadow-hover), 0 0 0 1px rgba(16, 163, 127, 0.1); }
.card[data-cat="google"]:hover { box-shadow: var(--shadow-hover), 0 0 0 1px rgba(234, 67, 53, 0.1); }

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .hero h1 { font-size: 1.5rem; }
  .stats-bar { gap: 1rem; }
  .stat-val { font-size: 1.2rem; }
  .filter-row { gap: 0.4rem; overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; scrollbar-width: none; padding-bottom: 2px; }
  .filter-row::-webkit-scrollbar { display: none; }
  .type-filter-row { gap: 0.3rem; }
  .type-btn { padding: 0.3rem 0.6rem; font-size: 0.72rem; flex-shrink: 0; }
  .secondary-controls { align-items: stretch; }
  .month-filter { width: 100%; justify-content: space-between; }
  .month-select { flex: 1; }
  .search-box { flex-basis: 100%; }
  .search-input { max-width: 100%; }
  .filter-btn { padding: 0.4rem 0.75rem; font-size: 0.8rem; flex-shrink: 0; }
  .card { padding: 0.85rem 1rem; }
  .card-top { align-items: flex-start; flex-wrap: wrap; }
  .card-source-meta { justify-content: flex-start; }
  .card-title { font-size: 0.95rem; }
  .header-inner { padding: 0.6rem 1rem; }
  .site-logo { font-size: 0.95rem; }
  .lang-btn { padding: 0.35rem 0.45rem; font-size: 0.7rem; }
  .trend-title { font-size: 0.78rem; }
  .main { padding: 1.5rem 1rem 3rem; }
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* ---------- Back to Top ---------- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 1.5rem;
  z-index: 90;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 0.3s, transform 0.3s, border-color var(--transition), background var(--transition);
  appearance: none;
  -webkit-appearance: none;
}
.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.back-to-top:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow), var(--shadow-card);
}

/* ---------- Month Indicator ---------- */
.month-indicator {
  position: fixed;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.month-indicator.visible {
  opacity: 1;
  pointer-events: auto;
}
.month-indicator a {
  display: block;
  padding: 0.3rem 0.55rem;
  font-size: 0.7rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text-dim);
  text-decoration: none;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all var(--transition);
  white-space: nowrap;
  text-align: center;
  line-height: 1.3;
}
.month-indicator a:hover {
  color: var(--text);
  border-color: var(--border-hover);
  text-decoration: none;
}
.month-indicator a.active {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-glow);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

@media (max-width: 1280px) {
  .month-indicator { display: none; }
}
@media (max-width: 640px) {
  .back-to-top { bottom: 1rem; right: 1rem; width: 38px; height: 38px; }
}