/* ── Tokens ─────────────────────────────────────────────────────────────────── */
:root {
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --radius: 14px;
  --sidebar-w: 268px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #090b11;
  --bg-glow-a: rgba(124, 140, 255, .11);
  --bg-glow-b: rgba(176, 124, 255, .07);
  --sidebar: #0d1017;
  --card: #121622;
  --card-hover: #161b2a;
  --border: #1d2333;
  --border-strong: #2c3550;
  --text: #e9ecf6;
  --text-dim: #a6aec6;
  --text-mute: #6d758e;
  --accent: #8b9cff;
  --accent-soft: rgba(139, 156, 255, .13);
  --accent-2: #b48cff;
  --ok: #4ade80;
  --warn: #fbbf24;
  --bad: #f87171;
  --shadow: 0 1px 0 rgba(255, 255, 255, .03) inset, 0 10px 30px -18px rgba(0, 0, 0, .8);
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f3f4f9;
  --bg-glow-a: rgba(99, 115, 255, .09);
  --bg-glow-b: rgba(176, 124, 255, .06);
  --sidebar: #ffffff;
  --card: #ffffff;
  --card-hover: #fafbff;
  --border: #e4e7f1;
  --border-strong: #cdd3e6;
  --text: #141a2e;
  --text-dim: #495271;
  --text-mute: #858eaa;
  --accent: #4b5cf0;
  --accent-soft: rgba(75, 92, 240, .09);
  --accent-2: #8f4fe8;
  --ok: #16a34a;
  --warn: #d97706;
  --bad: #dc2626;
  --shadow: 0 1px 2px rgba(20, 26, 46, .04), 0 12px 28px -20px rgba(20, 26, 46, .25);
}

/* ── Base ───────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 var(--font);
  -webkit-font-smoothing: antialiased;
}
[hidden] { display: none !important; }
h1, h2, h3, p, ul { margin: 0; padding: 0; }
ul { list-style: none; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; color: inherit; }
.mono { font-family: var(--mono); font-size: .93em; }
.muted { color: var(--text-mute); }
.small { font-size: 12px; }
.icon { width: 18px; height: 18px; flex: none; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }

.skip-link {
  position: absolute; left: 12px; top: -48px; z-index: 50;
  background: var(--accent); color: #fff; padding: 8px 14px; border-radius: 8px;
}
.skip-link:focus { top: 12px; }

/* ── Layout ─────────────────────────────────────────────────────────────────── */
.app { display: grid; grid-template-columns: var(--sidebar-w) minmax(0, 1fr); min-height: 100vh; }

.sidebar {
  position: sticky; top: 0; height: 100vh;
  display: flex; flex-direction: column; gap: 28px;
  padding: 22px 16px;
  background: var(--sidebar);
  border-right: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: 12px; padding: 4px 8px; }
.brand-mark {
  display: grid; place-items: center; width: 38px; height: 38px; border-radius: 11px; color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 8px 20px -8px var(--accent);
}
.brand-mark svg { width: 22px; height: 22px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 16px; letter-spacing: -.01em; }
.brand-text small { color: var(--text-mute); font-size: 11.5px; }

.nav { display: flex; flex-direction: column; gap: 4px; }
.nav-item {
  position: relative; display: flex; align-items: center; gap: 12px;
  padding: 10px 12px; border-radius: 10px; color: var(--text-dim); font-weight: 500;
  transition: background .18s var(--ease), color .18s var(--ease);
}
.nav-item:hover { background: var(--accent-soft); color: var(--text); }
.nav-item.active { background: var(--accent-soft); color: var(--accent); }
.nav-item.active::before {
  content: ""; position: absolute; left: -16px; top: 9px; bottom: 9px; width: 3px;
  border-radius: 0 3px 3px 0; background: linear-gradient(var(--accent), var(--accent-2));
}
.nav-icon { display: grid; place-items: center; }
.nav-label { flex: 1; }
.nav-count {
  font: 600 11px var(--mono); color: var(--text-mute);
  background: var(--bg); border: 1px solid var(--border); padding: 1px 7px; border-radius: 999px;
}
.nav-count:empty { display: none; }
.nav-item.active .nav-count { color: var(--accent); border-color: transparent; background: var(--card); }

.sidebar-foot { margin-top: auto; display: flex; flex-direction: column; gap: 12px; padding: 0 6px; }
.refresh { display: flex; align-items: center; gap: 8px; color: var(--text-mute); font-size: 12px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--text-mute); }
.dot.ok { background: var(--ok); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 25%, transparent); }
.dot.warn { background: var(--warn); }
.dot.stale { background: var(--bad); }
.foot-actions { display: flex; align-items: center; justify-content: flex-end; }
.icon-btn {
  display: grid; place-items: center; width: 34px; height: 34px; cursor: pointer;
  background: transparent; border: 1px solid var(--border); border-radius: 10px; color: var(--text-dim);
  transition: border-color .18s, color .18s;
}
.icon-btn:hover { border-color: var(--border-strong); color: var(--text); }

.main {
  min-width: 0; padding: 34px clamp(16px, 3.5vw, 48px) 64px; outline: none;
  background:
    radial-gradient(900px 420px at 0% -8%, var(--bg-glow-a), transparent 70%),
    radial-gradient(700px 380px at 100% 0%, var(--bg-glow-b), transparent 70%);
}
.topbar { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; flex-wrap: wrap; margin-bottom: 26px; }
.titles h1 { font-size: clamp(24px, 3vw, 30px); letter-spacing: -.02em; line-height: 1.15; }
.titles p { margin-top: 6px; color: var(--text-dim); max-width: 60ch; }

.search {
  display: flex; align-items: center; gap: 8px; width: min(100%, 320px);
  padding: 0 12px; height: 40px; color: var(--text-mute);
  background: var(--card); border: 1px solid var(--border); border-radius: 11px;
  transition: border-color .18s, box-shadow .18s;
}
.search:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.search input { flex: 1; min-width: 0; height: 100%; border: 0; outline: 0; background: transparent; }
.search input::placeholder { color: var(--text-mute); }

/* ── Chips ──────────────────────────────────────────────────────────────────── */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.chip {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  padding: 6px 13px; border-radius: 999px; font-weight: 500; font-size: 13px; color: var(--text-dim);
  background: var(--card); border: 1px solid var(--border);
  transition: border-color .18s, color .18s, background .18s;
}
.chip:hover { border-color: var(--border-strong); color: var(--text); }
.chip.active { color: var(--accent); background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 45%, transparent); }
.chip-n { font: 600 11px var(--mono); opacity: .7; }

/* ── Cards / panels ─────────────────────────────────────────────────────────── */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 380px), 1fr)); gap: 16px; }
.card, .panel {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
}
.card { padding: 6px 18px 10px; transition: border-color .2s var(--ease); }
.card:hover { border-color: var(--border-strong); }
.card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 14px 0 10px; border-bottom: 1px solid var(--border); }
.card-head h3 { font-size: 14.5px; letter-spacing: -.005em; }

.panel { padding: 8px 20px 12px; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 0 10px; border-bottom: 1px solid var(--border); }
.panel-head h2 { display: flex; align-items: center; gap: 10px; font-size: 15px; }
.panel-head .icon { color: var(--accent); }

.split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; align-items: start; }
.stack { display: grid; gap: 18px; }

.rows > .row { padding: 11px 0; border-bottom: 1px solid var(--border); }
.rows > .row:last-child { border-bottom: 0; }
.row-title { display: block; font-weight: 500; line-height: 1.4; text-wrap: pretty; transition: color .15s; }
.row-title:hover { color: var(--accent); }
.tile:hover .tile-title { color: var(--accent); }

.meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; margin-top: 4px; color: var(--text-mute); font-size: 12.5px; }
.meta .sep { opacity: .5; }

.pill {
  display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 11.5px; font-weight: 500;
  color: var(--text-dim); background: var(--bg); border: 1px solid var(--border);
}
.pill-count { font-family: var(--mono); font-size: 11px; color: var(--text-mute); }
.pill-accent { color: var(--accent); background: var(--accent-soft); border-color: transparent; }

/* ── Tiles (trending) ───────────────────────────────────────────────────────── */
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); gap: 12px; padding: 14px 0 6px; }
.tile {
  display: flex; flex-direction: column; gap: 6px; padding: 14px 15px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 12px;
  transition: border-color .18s, transform .18s var(--ease), background .18s;
}
.tile:hover { border-color: color-mix(in srgb, var(--accent) 50%, var(--border)); background: var(--card-hover); transform: translateY(-1px); }
.tile-title { font-weight: 600; line-height: 1.35; overflow-wrap: anywhere; transition: color .15s; }
.tile-desc { color: var(--text-dim); font-size: 13px; display: -webkit-box; -webkit-line-clamp: 3; line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.tile .meta { margin-top: auto; padding-top: 4px; }
.stars, .views, .today { display: inline-flex; align-items: center; gap: 3px; }
.stars .icon, .views .icon { width: 13px; height: 13px; }
.stars .icon { color: var(--warn); }
.today { color: var(--ok); font-weight: 600; }

/* ── Empty state ────────────────────────────────────────────────────────────── */
.empty { padding: 36px 12px; text-align: center; color: var(--text-dim); }
.empty .hint { margin-top: 6px; color: var(--text-mute); font-size: 13px; }
.foot-note { margin-top: 18px; }
.noscript { padding: 24px; text-align: center; }

/* ── Responsive ─────────────────────────────────────────────────────────────── */
@media (max-width: 1180px) {
  .split { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 900px) {
  .app { grid-template-columns: minmax(0, 1fr); }
  .sidebar {
    height: auto; flex-direction: row; flex-wrap: wrap; align-items: center; gap: 10px 14px;
    padding: 12px 16px; border-right: 0; border-bottom: 1px solid var(--border); z-index: 10;
  }
  .brand-text small, .refresh, .nav-count { display: none; }
  .brand { padding: 0; }
  .sidebar-foot { margin: 0 0 0 auto; padding: 0; order: 2; }
  .nav { order: 3; flex-basis: 100%; flex-direction: row; gap: 6px; overflow-x: auto; scrollbar-width: none; }
  .nav::-webkit-scrollbar { display: none; }
  .nav-item { padding: 8px 12px; white-space: nowrap; flex: none; }
  .nav-item.active::before { display: none; }
  .main { padding-top: 24px; }
}

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