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

:root {
  --bg: #fbfbfb;
  --bg-deep: #f4f4f4;
  --ink: #1a1a1a;
  --muted: #6f6f6f;
  --accent: #ff6b35;
  --accent-2: #111111;
  --card: #ffffff;
  --line: #eeeeee;
  --shadow: none;
  --radius: 6px;
}

html.dark {
  --bg: #101113;
  --bg-deep: #16181b;
  --ink: #f1f1f1;
  --muted: #a2a7ad;
  --accent: #ff6b35;
  --accent-2: #f1f1f1;
  --card: #14171a;
  --line: #2a2f35;
}


* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Noto Serif SC", sans-serif;
  color: var(--ink);
  background: var(--bg);
  min-height: 100vh;
  font-size: 1.05rem;
  line-height: 1.75;
}

h1, h2, h3 {
  font-family: "IBM Plex Serif", "IBM Plex Sans", serif;
  margin: 0 0 12px;
  letter-spacing: 0.1px;
}

h1 {
  font-size: 2.5rem;
  line-height: 1.2;
}

p {
  margin: 0 0 12px;
  line-height: 1.7;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 6vw;
  background: #ffffff;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 1px;
}

.nav a {
  margin-left: 20px;
  font-weight: 600;
  color: var(--muted);
}

.nav a.active {
  color: var(--ink);
  border-bottom: 2px solid var(--accent-2);
  padding-bottom: 2px;
}

.theme-toggle {
  margin-left: 16px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease;
}

.theme-toggle:hover {
  background: var(--bg-deep);
}


.page {
  padding: 32px 6vw 80px;
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  align-items: center;
  padding: 34px;
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  animation: rise 0.8s ease-out;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #f7f7f7;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.4px;
  margin-bottom: 14px;
}

.hero-title {
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1.2;
}


.eyebrow {
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 12px;
  color: var(--muted);
  font-weight: 700;
}

.sub {
  color: var(--muted);
  font-size: 17px;
}

.hero-actions {
  margin-top: 20px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--accent-2);
  color: #ffffff;
  font-weight: 600;
  border: 2px solid var(--accent-2);
  transition: transform 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  background: var(--accent-2);
}

.btn.ghost {
  background: transparent;
  color: var(--accent-2);
  border-color: var(--line);
}

.btn.ghost:hover {
  background: #f9f9f9;
}

html.dark .btn.ghost:hover {
  background: #1f2328;
}


.hero-panel {
  display: grid;
  gap: 14px;
}

.panel-card {
  padding: 18px;
  border-radius: 14px;
  background: #f4f4f4;
  border: 1px solid var(--line);
}

.panel-card.alt {
  background: #f1f1f1;
  border: 1px solid var(--line);
}

.panel-title {
  font-size: 12px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}

.panel-big {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px;
}

.section {
  margin-top: 48px;
}

.section-head {
  margin-bottom: 20px;
}

.muted {
  color: var(--muted);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 16px;
}

.topic-card {
  padding: 20px;
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: none;
  transition: transform 0.2s ease, background 0.2s ease;
  grid-column: span 4;
}

.topic-media {
  margin-bottom: 12px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #f1f1f1;
}

.topic-thumb {
  display: block;
  width: 100%;
  height: 140px;
  object-fit: cover;
}

.topic-thumb.is-blurred {
  filter: blur(10px);
  transform: scale(1.03);
}

.topic-card:hover {
  transform: translateY(-4px);
  background: #f9f9f9;
}

.topic-card:first-child {
  grid-column: span 8;
}

.topic-grid.is-loading .topic-card {
  min-height: 180px;
}

.skeleton {
  position: relative;
  overflow: hidden;
  background: #f2f2f2;
  border-color: #f0f0f0;
}

.skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.7), transparent);
  animation: shimmer 1.2s infinite;
}

.topic-card h3 {
  font-size: 20px;
}

.tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.tag {
  padding: 4px 10px;
  background: #ededed;
  border-radius: 999px;
  font-size: 12px;
  color: var(--muted);
}

.topic-page {
  padding-top: 24px;
}

.topic-head {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.8fr);
  gap: 20px;
  padding: 22px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--card);
}

.topic-head-main h1 {
  margin-bottom: 8px;
}

.topic-head-badges {
  display: grid;
  gap: 10px;
  align-content: start;
}

.status-badge {
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #f4f4f4;
  font-weight: 600;
  font-size: 13px;
}

.overview-card {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  padding: 18px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--card);
}

.overview-text {
  font-size: 16px;
  margin: 0;
}

.overview-meta {
  display: grid;
  grid-auto-flow: column;
  gap: 8px;
  align-items: center;
  font-weight: 600;
}

.metric {
  padding: 12px 16px;
  border-radius: 12px;
  background: #f4f4f4;
  text-align: center;
  min-width: 90px;
}

.metric-value {
  display: block;
  font-size: 20px;
  font-weight: 700;
}

.cluster-nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-chip {
  border: 1px solid var(--line);
  background: #ffffff;
  border-radius: 999px;
  padding: 6px 12px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease;
}

.nav-chip.is-active {
  border-color: var(--accent-2);
  color: var(--accent-2);
}

.filter-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-chip {
  border: 1px solid var(--line);
  background: #ffffff;
  border-radius: 999px;
  padding: 6px 12px;
  font-weight: 600;
  cursor: pointer;
  font-size: 13px;
  transition: background 0.2s ease;
}

.filter-chip.is-active {
  border-color: var(--accent-2);
  color: var(--accent-2);
}

.cluster-block {
  margin-bottom: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--card);
}

.cluster-block summary {
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

.cluster-block summary::-webkit-details-marker {
  display: none;
}

.cluster-title {
  font-weight: 700;
}

.cluster-count {
  border-radius: 999px;
  border: 1px solid var(--line);
  padding: 2px 8px;
  font-size: 12px;
}

.cluster-summary {
  color: var(--muted);
  font-size: 13px;
}

.cluster-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.cluster-body {
  border-top: 1px solid var(--line);
  padding: 12px 16px;
  display: grid;
  gap: 10px;
}

.item-card {
  padding: 18px;
  margin-bottom: 18px;
  background: var(--card);
  border-radius: 14px;
  border: 1px solid var(--line);
  box-shadow: none;
}

.item-row {
  display: grid;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #ffffff;
  transition: background 0.2s ease;
}

.item-row-top {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 12px;
  align-items: center;
  font-size: 13px;
  color: var(--muted);
}

.icon-btn {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 2px 6px;
  font-size: 12px;
  transition: background 0.2s ease;
}

.item-claim {
  font-weight: 600;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.item-row-foot {
  display: grid;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
}

.item-mini {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.item-chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 11px;
  color: var(--muted);
  background: #f7f7f7;
}

.item-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  color: var(--muted);
  font-size: 13px;
}

.item-title {
  font-size: 18px;
  font-weight: 700;
  margin: 8px 0 6px;
}

.item-summary {
  background: #f4f4f4;
  border-radius: 12px;
  padding: 12px;
  margin-top: 10px;
}

.item-summary p {
  margin: 0 0 6px;
}

.item-summary strong {
  color: var(--accent-2);
}

.item-footer {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.badge {
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 12px;
  background: #ededed;
  color: var(--ink);
}

.notice {
  padding: 16px;
  border-radius: 14px;
  background: #f4f4f4;
  border: 1px solid var(--line);
}

.about-hero {
  padding: 26px;
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  animation: rise 0.8s ease-out;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}

.about-card {
  padding: 18px;
  background: var(--card);
  border-radius: 14px;
  border: 1px solid var(--line);
}

.detail-hero {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: space-between;
  padding: 26px;
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  animation: rise 0.8s ease-out;
}

.detail-links {
  margin-top: 16px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 24px;
}

.detail-panel {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  padding: 20px;
}

.detail-block {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.detail-block:last-child {
  border-bottom: none;
}

.detail-block .label {
  font-size: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}

.detail-block .value {
  margin: 0;
}

.detail-list {
  margin: 0;
  padding-left: 18px;
  color: var(--ink);
  line-height: 1.6;
}

.detail-media {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: #f1f1f1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 260px;
}

.detail-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.site-footer {
  padding: 24px 6vw 40px;
  color: var(--muted);
  text-align: center;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes shimmer {
  100% {
    transform: translateX(100%);
  }
}

@media (max-width: 720px) {
  .site-header {
    flex-direction: column;
    gap: 10px;
  }

  .topic-head {
    grid-template-columns: 1fr;
  }

  .detail-grid {
    grid-template-columns: 1fr;
  }

  .topic-thumb {
    height: 120px;
  }

  .topic-media-hero {
    max-width: 100%;
  }

  .cluster-block summary {
    grid-template-columns: 1fr;
  }

  .cluster-tags {
    justify-content: flex-start;
  }

  .overview-card {
    flex-direction: column;
  }

  .topic-card {
    grid-column: span 12;
  }

  .topic-card:first-child {
    grid-column: span 12;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}