:root {
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --paper: #f8fafc;
  --card: #fff;
  --teal: #0d9488;
  --teal-soft: #ccfbf1;
  --amber: #d97706;
  --font: "Outfit", "Noto Sans SC", sans-serif;
  --body: "Noto Sans SC", system-ui, sans-serif;
  --max: 1120px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--body);
  color: var(--ink);
  background:
    radial-gradient(ellipse 70% 40% at 90% 0%, rgba(13, 148, 136, 0.12), transparent 55%),
    var(--paper);
  line-height: 1.6;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
.wrap { width: min(100% - 2rem, var(--max)); margin-inline: auto; }

.top {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(248, 250, 252, 0.9);
  border-bottom: 1px solid var(--line);
}
.bar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: 0.85rem 0; flex-wrap: wrap;
}
.brand strong {
  font-family: var(--font); font-weight: 800; font-size: 1.1rem; display: block;
}
.brand small { color: var(--muted); font-size: 0.75rem; }
.links { display: flex; gap: 0.75rem; align-items: center; flex-wrap: wrap; font-weight: 600; font-size: 0.9rem; color: var(--muted); }
.links a:hover { color: var(--teal); }
.links .cta {
  background: var(--teal); color: #fff !important;
  padding: 0.4rem 0.85rem; border-radius: 999px;
}

.hero { padding: 1.8rem 0 1.1rem; }
.eyebrow {
  font-size: 0.75rem; font-weight: 800; letter-spacing: 0.08em;
  color: var(--teal); font-family: var(--font);
}
.hero h1 {
  font-family: var(--font); font-weight: 800;
  font-size: clamp(1.55rem, 3.5vw, 2.15rem);
  letter-spacing: -0.02em; margin: 0.4rem 0 0.55rem; max-width: 40rem;
}
.lead { color: var(--muted); max-width: 46rem; font-size: 0.98rem; }
.stats {
  display: flex; flex-wrap: wrap; gap: 0.55rem; margin-top: 1rem;
}
.stat {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 0.45rem 0.8rem;
  font-size: 0.85rem; font-weight: 700;
}
.stat b { color: var(--teal); font-family: var(--font); }

.toolbar {
  display: flex; gap: 0.55rem; flex-wrap: wrap; align-items: center;
  margin: 0.4rem 0 0.8rem;
}
.toolbar input[type="search"], .toolbar select {
  padding: 0.65rem 0.85rem; border-radius: 12px;
  border: 1px solid var(--line); font: inherit; background: #fff;
}
.toolbar input[type="search"] { flex: 1; min-width: 12rem; }
.chk { font-size: 0.88rem; color: var(--muted); font-weight: 600; display: flex; align-items: center; gap: 0.35rem; }

.subjects { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1rem; }
.sub {
  border: 1px solid var(--line); background: #fff; border-radius: 999px;
  padding: 0.35rem 0.75rem; font-size: 0.82rem; font-weight: 700;
  color: var(--muted); cursor: pointer;
}
.sub.on, .sub:hover { background: var(--teal-soft); color: #0f766e; border-color: rgba(13,148,136,0.35); }

.layout {
  display: grid; grid-template-columns: minmax(240px, 0.95fr) 1.35fr;
  gap: 1rem; align-items: start; margin-bottom: 2rem;
}
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
}
.list-pane, .detail-pane {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 16px; overflow: hidden;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.04);
}
.list-head {
  padding: 0.7rem 0.9rem; border-bottom: 1px solid var(--line);
  font-size: 0.82rem; font-weight: 700; color: var(--muted);
}
.list { max-height: 62vh; overflow: auto; }
.item {
  display: block; width: 100%; text-align: left; border: 0; border-bottom: 1px solid var(--line);
  background: #fff; padding: 0.75rem 0.9rem; cursor: pointer; font: inherit;
}
.item:hover, .item.on { background: #f0fdfa; }
.item .name { font-weight: 700; font-size: 0.92rem; }
.item .meta { font-size: 0.75rem; color: var(--muted); margin-top: 0.2rem; }
.item.done .name { color: var(--teal); }
.item.done .name::after { content: " ✓"; }

.detail-pane { padding: 1.1rem 1.15rem 1.3rem; min-height: 320px; }
.detail-pane .empty { color: var(--muted); padding: 2rem 0.5rem; text-align: center; }
.detail-pane h2 {
  font-family: var(--font); font-size: 1.35rem; font-weight: 800; margin: 0.2rem 0 0.45rem;
}
.badge-row { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 0.75rem; }
.badge {
  font-size: 0.72rem; font-weight: 700; padding: 0.25rem 0.55rem;
  border-radius: 999px; background: var(--teal-soft); color: #0f766e;
}
.sec-title {
  font-size: 0.78rem; font-weight: 800; letter-spacing: 0.06em;
  color: var(--muted); margin: 1rem 0 0.4rem; text-transform: uppercase;
}
.detail-pane p, .detail-pane li { font-size: 0.92rem; color: #334155; }
.detail-pane ul { padding-left: 1.1rem; }
.detail-pane li { margin: 0.25rem 0; }
.path {
  display: flex; flex-wrap: wrap; gap: 0.35rem; align-items: center; margin-top: 0.35rem;
}
.pill {
  border: 1px solid var(--line); background: #f8fafc; border-radius: 999px;
  padding: 0.3rem 0.65rem; font-size: 0.78rem; font-weight: 700; cursor: pointer;
}
.pill:hover { border-color: var(--teal); color: var(--teal); }
.arrow { color: var(--muted); font-size: 0.75rem; }
.master {
  margin-top: 1.1rem; display: flex; gap: 0.55rem; flex-wrap: wrap; align-items: center;
}
.btn {
  border: 0; border-radius: 999px; padding: 0.55rem 0.95rem;
  font: inherit; font-weight: 700; cursor: pointer;
}
.btn-main { background: var(--teal); color: #fff; }
.btn-soft { background: #fff; border: 1px solid var(--line); color: var(--ink); }

.note {
  background: #fff; border: 1px solid var(--line); border-radius: 16px;
  padding: 1.15rem 1.2rem; margin-bottom: 2rem;
}
.note h2 { font-family: var(--font); font-size: 1.05rem; margin-bottom: 0.5rem; }
.note ol { padding-left: 1.2rem; color: var(--muted); font-size: 0.92rem; }
.note li { margin: 0.3rem 0; }
.attr { margin-top: 0.9rem; font-size: 0.82rem; color: var(--muted); }
.attr a { color: var(--teal); font-weight: 700; }

.foot {
  border-top: 1px solid var(--line); padding: 1.2rem 0 1.8rem;
  color: var(--muted); font-size: 0.88rem;
}
.foot a { color: var(--teal); font-weight: 700; }