:root {
  --accent: #2f7dff;
  --bg: #f5f7fb;
  --panel: rgba(255, 255, 255, 0.88);
  --text: #172033;
  --muted: #6b7280;
  --line: rgba(23, 32, 51, 0.1);
  --shadow: 0 18px 45px rgba(22, 31, 58, 0.12);
  --card-radius: 14px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background: var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

body.dark {
  --bg: #101421;
  --panel: rgba(22, 28, 45, 0.9);
  --text: #eef3ff;
  --muted: #a9b2c7;
  --line: rgba(238, 243, 255, 0.12);
  --shadow: 0 18px 45px rgba(0, 0, 0, 0.3);
}

a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  height: 68px;
  padding: 0 max(20px, calc((100vw - 1180px) / 2));
  color: #fff;
  background: rgba(12, 18, 33, 0.54);
  backdrop-filter: blur(18px);
}

.brand, .nav, .header-actions { display: flex; align-items: center; }
.brand { gap: 10px; font-weight: 800; }
.brand img { width: 34px; height: 34px; }
.nav { gap: 8px; flex: 1; justify-content: center; }
.nav a {
  padding: 8px 10px;
  border-radius: 8px;
  color: rgba(255,255,255,0.86);
  font-size: 14px;
}
.nav a:hover { background: rgba(255,255,255,0.12); color: #fff; }
.header-actions { gap: 8px; }
.icon-button {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 999px;
  color: inherit;
  background: rgba(255,255,255,0.08);
  cursor: pointer;
}

.hero {
  min-height: 430px;
  display: grid;
  align-items: end;
  padding: 120px max(20px, calc((100vw - 1180px) / 2)) 68px;
  color: #fff;
  background-size: cover;
  background-position: center;
  position: relative;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,14,24,.3), rgba(10,14,24,.76));
}
.hero-content { position: relative; max-width: 760px; }
.eyebrow { margin: 0 0 10px; color: rgba(255,255,255,0.72); font-weight: 700; }
.hero h1 { margin: 0; font-size: clamp(36px, 7vw, 72px); line-height: 1.05; letter-spacing: 0; }
.hero p:last-child { max-width: 620px; color: rgba(255,255,255,0.82); font-size: 18px; line-height: 1.7; }

.layout {
  width: min(1180px, calc(100vw - 40px));
  margin: 34px auto 80px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 24px;
  align-items: start;
}
.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.section-title h2 { margin: 0; font-size: 24px; }
.section-title span { color: var(--muted); }
.post-list { display: grid; gap: 18px; }

.card, .post-card {
  border: 1px solid var(--line);
  border-radius: var(--card-radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}
.post-card {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  overflow: hidden;
  min-height: 188px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.post-card:hover { transform: translateY(-4px); box-shadow: 0 24px 60px rgba(22,31,58,.18); }
.post-cover { min-height: 188px; overflow: hidden; background: #d7deec; }
.post-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.post-card:hover .post-cover img { transform: scale(1.06); }
.post-body { padding: 22px; }
.post-meta { display: flex; flex-wrap: wrap; gap: 10px; color: var(--muted); font-size: 13px; }
.meta-button {
  border: 0;
  padding: 0;
  color: var(--accent);
  background: transparent;
  cursor: pointer;
}
.post-body h3 { margin: 10px 0; font-size: 22px; }
.post-body p { color: var(--muted); line-height: 1.7; margin: 0 0 14px; }
.tags, .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  border: 0;
  padding: 5px 9px;
  border-radius: 999px;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  font-size: 12px;
}
.filter-tag { cursor: pointer; }
.filter-tag:hover, .meta-button:hover { text-decoration: underline; }

.sidebar { position: sticky; top: 88px; display: grid; gap: 18px; }
.card { padding: 20px; }
.profile { text-align: center; }
.avatar {
  width: 92px;
  height: 92px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid rgba(255,255,255,0.65);
}
.profile h3, .card h3 { margin: 12px 0 8px; }
.profile p, .notice p { color: var(--muted); line-height: 1.7; }
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 18px 0;
}
.stats span { color: var(--muted); font-size: 12px; }
.stats strong { display: block; color: var(--text); font-size: 20px; }
.profile-links { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.profile-links a {
  padding: 10px;
  border-radius: 8px;
  color: #fff;
  background: var(--accent);
}

.search-dialog {
  width: min(720px, calc(100vw - 32px));
  border: 0;
  border-radius: 14px;
  background: var(--panel);
  color: var(--text);
  box-shadow: var(--shadow);
}
.search-dialog::backdrop { background: rgba(0,0,0,.45); backdrop-filter: blur(5px); }
.search-dialog .close { float: right; color: var(--text); border-color: var(--line); }
.search-dialog input {
  width: 100%;
  margin: 18px 0;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  background: transparent;
}
.search-result { display: block; padding: 12px 0; border-top: 1px solid var(--line); }
.search-result span { color: var(--muted); font-size: 13px; }

.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 50%;
  color: #fff;
  background: var(--accent);
  box-shadow: var(--shadow);
  cursor: pointer;
}

.site-footer {
  width: min(1180px, calc(100vw - 40px));
  margin: 0 auto 34px;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  color: var(--muted);
  font-size: 13px;
}
.site-footer a { color: var(--accent); font-weight: 700; }

.article-shell {
  width: min(900px, calc(100vw - 40px));
  margin: 110px auto 80px;
}
.article { padding: 28px; }
.article-back { color: var(--muted); }
.article-cover {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  border-radius: 10px;
  margin: 18px 0;
}
.article h1 {
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.1;
  letter-spacing: 0;
}
.article-content {
  color: var(--text);
  line-height: 1.85;
  font-size: 17px;
}
.article-content p { color: var(--muted); }
.article-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 28px;
}
.article-nav a, .related-posts a {
  display: grid;
  gap: 5px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
}
.article-nav span, .related-posts span { color: var(--muted); font-size: 13px; }
.related-posts { margin-top: 28px; }
.related-posts h2 { font-size: 22px; }
.related-posts div {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 12px;
}
.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.media-item {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: color-mix(in srgb, var(--panel) 86%, transparent);
}
.media-item img, .media-file {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}
.media-file {
  display: grid;
  place-items: center;
  color: var(--accent);
  font-weight: 700;
}
.media-item div { padding: 14px; }
.media-item h3 { margin: 0 0 6px; }
.media-item p { min-height: 42px; margin: 0 0 10px; color: var(--muted); line-height: 1.6; }
.media-item a { color: var(--accent); font-weight: 700; }
.archive-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 20px 0 28px;
}
.archive-summary span {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--muted);
  text-align: center;
}
.archive-summary strong { display: block; color: var(--text); font-size: 26px; }
.archive-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 24px;
  align-items: start;
}
.archive-list { display: grid; gap: 10px; }
.archive-row {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr) 100px;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
}
.archive-row time, .archive-row span { color: var(--muted); font-size: 13px; }
.archive-cloud { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }

@media (max-width: 880px) {
  .site-header { height: auto; min-height: 64px; flex-wrap: wrap; padding: 12px 18px; }
  .nav { order: 3; justify-content: flex-start; overflow-x: auto; width: 100%; }
  .layout { grid-template-columns: 1fr; width: min(100vw - 28px, 680px); }
  .sidebar { position: static; }
  .post-card { grid-template-columns: 1fr; }
  .post-cover { aspect-ratio: 16 / 9; min-height: 0; }
  .hero { min-height: 390px; padding-inline: 18px; }
  .archive-summary, .archive-layout, .archive-row { grid-template-columns: 1fr; }
  .article-nav { grid-template-columns: 1fr; }
}