/* 基础主题变量 */
:root {
  --bg: #0b0d10;
  --card: #12151a;
  --text: #e6eaf2;
  --muted: #9aa4b2;
  --brand: #0865d6;
  --brand-2: #5ac8fa;
  --ring: 0 0 0 3px color-mix(in oklab, var(--brand) 30%, transparent);
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0,0,0,.35), 0 1px 0 rgba(255,255,255,.02) inset;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fb;
    --card: #ffffff;
    --text: #111318;
    --muted: #5b6471;
    --brand: #0a66ff;
    --brand-2: #0fb9b1;
    --shadow: 0 12px 30px rgba(10,20,40,.08), 0 1px 0 rgba(0,0,0,.03) inset;
  }
}

/* 手动主题切换：当 html[data-theme] 设置时，覆盖上面的默认/系统首选项 */
:root[data-theme="dark"] {
  --bg: #0b0d10;
  --card: #12151a;
  --text: #e6eaf2;
  --muted: #9aa4b2;
  --brand: #0865d6;
  --brand-2: #5ac8fa;
  --shadow: 0 10px 30px rgba(0,0,0,.35), 0 1px 0 rgba(255,255,255,.02) inset;
}

:root[data-theme="light"] {
  --bg: #f7f8fb;
  --card: #ffffff;
  --text: #111318;
  --muted: #5b6471;
  --brand: #0a66ff;
  --brand-2: #0fb9b1;
  --shadow: 0 12px 30px rgba(10,20,40,.08), 0 1px 0 rgba(0,0,0,.03) inset;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: "Inter", ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1200px 600px at 10% -10%, color-mix(in oklab, var(--brand) 8%, transparent), transparent),
              radial-gradient(1200px 600px at 90% -10%, color-mix(in oklab, var(--brand-2) 10%, transparent), transparent),
              var(--bg);
  color: var(--text);
}

.container { width: min(1200px, 92vw); margin: 0 auto; }

.site-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 28px 0; }
.brand { display: flex; align-items: center; gap: 14px; }
.brand .logo { font-size: 28px; filter: drop-shadow(0 4px 10px rgba(0,0,0,.2)); }
.site-header h1 { font-size: 24px; margin: 0; letter-spacing: .3px; }
.site-header .sub { margin: 2px 0 0; color: var(--muted); font-size: 14px; }
.actions { display: flex; gap: 10px; align-items: center; }
.actions input[type="search"] { 
  background: var(--card); border: 1px solid color-mix(in oklab, var(--text) 10%, transparent);
  color: var(--text); padding: 12px 14px; border-radius: 12px; outline: none; min-width: 320px;
}
.actions input[type="search"]:focus { box-shadow: var(--ring); border-color: var(--brand); }
.actions button { border: 0; background: var(--card); color: var(--text); padding: 10px 12px; border-radius: 12px; cursor: pointer; }
.actions button:hover { transform: translateY(-1px); box-shadow: 0 8px 16px rgba(0,0,0,.12); }

/* 全局链接样式 */
a { color: color-mix(in oklab, var(--brand) 90%, var(--text)); text-decoration: none; }
a:hover { text-decoration: underline; }

.filters { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin: 14px 0 10px; }
.tag-list { display: flex; gap: 10px; flex-wrap: wrap; }
.tag { padding: 6px 10px; border-radius: 999px; background: color-mix(in oklab, var(--card) 90%, var(--brand) 10%);
  color: var(--text); border: 1px solid color-mix(in oklab, var(--text) 12%, transparent); cursor: pointer; font-size: 13px; }
.tag.active { background: color-mix(in oklab, var(--brand) 30%, var(--card)); border-color: var(--brand); }
.sort select { background: var(--card); color: var(--text); border: 1px solid color-mix(in oklab, var(--text) 12%, transparent); padding: 8px 10px; border-radius: 10px; }

.grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 18px; margin: 18px 0 60px; }
.card { grid-column: span 4; background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  border: 1px solid color-mix(in oklab, var(--text) 8%, transparent); overflow: hidden; display: flex; flex-direction: column; }
.card .thumb { aspect-ratio: 16/9; background: linear-gradient(135deg, color-mix(in oklab, var(--brand) 25%, transparent), color-mix(in oklab, var(--brand-2) 20%, transparent)); position: relative; }
.card .thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.card .content { padding: 16px; display: grid; gap: 10px; }
.card h3 { margin: 0; font-size: 18px; line-height: 1.3; }
.card p { margin: 0; color: var(--muted); }
.card .meta { display: flex; align-items: center; justify-content: space-between; color: var(--muted); font-size: 12px; }
.card .tags { display: flex; flex-wrap: wrap; gap: 6px; }
.card .tags .tag { font-size: 12px; padding: 4px 8px; }
.card a.more { display: inline-flex; align-items: center; gap: 8px; width: fit-content; color: var(--brand); text-decoration: none; font-weight: 600; }
.card a.more:hover { text-decoration: underline; }

@media (max-width: 1024px) {
  .card { grid-column: span 6; }
}
@media (max-width: 640px) {
  .actions input[type="search"] { min-width: 0; width: 52vw; }
  .grid { grid-template-columns: repeat(6, 1fr); }
  .card { grid-column: span 6; }
}

.article { width: min(860px, 88vw); margin: 30px auto 70px; background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  border: 1px solid color-mix(in oklab, var(--text) 8%, transparent); overflow: hidden; }
.article .hero { height: 320px; background: linear-gradient(135deg, color-mix(in oklab, var(--brand) 25%, transparent), color-mix(in oklab, var(--brand-2) 20%, transparent)); }
.article .hero img { width: 100%; height: 100%; object-fit: cover; display: block; }
.article .body { padding: 28px; }
.article h1 { margin: 0 0 12px; font-size: 30px; }
.article .meta { color: var(--muted); font-size: 14px; margin-bottom: 16px; }
.article .content { color: var(--text); line-height: 1.8; }
.article .content img { max-width: 100%; border-radius: 10px; box-shadow: 0 8px 20px rgba(0,0,0,.15); }
.article .content svg { max-width: 100%; height: auto; display: block; margin: 12px auto; }
.article .content pre, .article .content code { background: color-mix(in oklab, var(--card) 70%, #000 30%); padding: 2px 6px; border-radius: 6px; }
.article .tags { margin-top: 12px; display: flex; gap: 8px; flex-wrap: wrap; }

.site-footer { border-top: 1px solid color-mix(in oklab, var(--text) 8%, transparent); padding: 18px 0; background: color-mix(in oklab, var(--card) 85%, transparent); }
.footer-grid { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px 18px; }
.footer-grid .label { color: var(--muted); margin-right: 6px; white-space: nowrap; }
.footer-grid a { color: color-mix(in oklab, var(--text) 70%, var(--brand) 30%); }
.footer-grid img { height: 18px; vertical-align: -3px; margin-right: 4px; filter: drop-shadow(0 1px 2px rgba(0,0,0,.12)); }
.footer-grid > div { background: none; border: 0; padding: 0; border-radius: 0; display: inline-flex; align-items: center; }
.footer-grid > div:not(:first-child)::before { content: "·"; color: var(--muted); margin: 0 8px; }
@media (max-width: 640px) { .footer-grid { justify-content: flex-start; padding-left: 4vw; padding-right: 4vw; } .footer-grid > div { margin: 2px 0; } }

.empty { color: var(--muted); text-align: center; padding: 50px 0; }

/* 微交互 */
.card:hover { transform: translateY(-3px); transition: .25s ease; }
.tag:hover { transform: translateY(-1px); }