:root {
  --bg: #f6f6f3;
  --surface: #ffffff;
  --text: #1c1d1f;
  --muted: #5d6066;
  --border: #e3e3de;
  --accent: #1f4fd1;
  --accent-soft: #e8eefc;
  --on-accent: #ffffff;
  --green: #1a7f37;
  --green-soft: #e3f4e8;
  --orange: #c2610c;
  --orange-soft: #fdf0e1;
  --gray: #6b7280;
  --gray-soft: #eeeff1;
  --warn-bg: #fff6db;
  --warn-border: #f0d78a;
  --radius: 10px;
  --header-h: 60px;
  --footer-h: 40px;
  --sidebar-w: 300px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131416;
    --surface: #1c1e21;
    --text: #e9e9e7;
    --muted: #a0a4ab;
    --border: #2e3136;
    --accent: #7ea2ff;
    --accent-soft: #1f2a45;
    --on-accent: #10131a;
    --green: #4cc46e;
    --green-soft: #17311f;
    --orange: #f0a04b;
    --orange-soft: #3a2810;
    --gray: #a0a4ab;
    --gray-soft: #2a2c30;
    --warn-bg: #2b2513;
    --warn-border: #574818;
  }
}

* { box-sizing: border-box; }
html { scroll-padding-top: calc(var(--header-h) + 16px); }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
code { font-size: 0.85em; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  height: 36px; padding: 0 14px; border-radius: 8px;
  font: inherit; font-size: 0.9rem; font-weight: 600; text-decoration: none; cursor: pointer;
  border: 1px solid transparent; white-space: nowrap;
}
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--accent); }
.link-btn { background: none; border: 0; padding: 0; color: var(--accent); font: inherit; font-size: 0.85rem; cursor: pointer; }

/* ---------- fixed header ---------- */
.topbar {
  position: fixed; inset: 0 0 auto 0; z-index: 30; height: var(--header-h);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner { max-width: 1280px; height: 100%; margin: 0 auto; padding: 0 16px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.brand { font-size: 1.15rem; font-weight: 700; letter-spacing: -0.01em; color: var(--text); text-decoration: none; white-space: nowrap; }
.topbar-actions { display: flex; gap: 8px; }

/* ---------- layout ---------- */
.layout {
  max-width: 1280px; margin: 0 auto;
  padding: calc(var(--header-h) + 24px) 16px calc(var(--footer-h) + 32px);
  display: grid; grid-template-columns: var(--sidebar-w) minmax(0, 1fr); gap: 32px; align-items: start;
}

/* ---------- sticky sidebar ---------- */
.sidebar {
  position: sticky; top: calc(var(--header-h) + 24px);
  max-height: calc(100vh - var(--header-h) - var(--footer-h) - 48px);
  overflow-y: auto; overscroll-behavior: contain;
  display: grid; gap: 18px; padding: 0 6px 8px 0;
  scrollbar-width: thin;
}
.sidebar-head { display: flex; justify-content: space-between; align-items: baseline; }
.sidebar-title { margin: 0; font-size: 1rem; }
.sidebar-close { display: none; }
.search {
  width: 100%; font: inherit; font-size: 0.95rem; padding: 10px 12px;
  border: 1px solid var(--border); border-radius: 8px; background: var(--surface); color: var(--text);
}
.search:focus, .num-field input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.filter-group { border: 0; margin: 0; padding: 0; min-width: 0; }
.filter-group legend { font-size: 0.68rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); margin-bottom: 8px; padding: 0; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { border: 1px solid var(--border); background: var(--surface); color: var(--text); border-radius: 999px; padding: 3px 10px; font: inherit; font-size: 0.76rem; cursor: pointer; }
.chip:hover { border-color: var(--accent); }
.chip[aria-pressed="true"] { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); font-weight: 600; }
.status-chip::before { content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%; margin-right: 5px; vertical-align: 1px; }
.status-chip.status-live::before { background: var(--green); }
.status-chip.status-transition::before { background: var(--orange); }
.status-chip.status-planned::before { background: var(--gray); }

.profile { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.profile > summary { padding: 12px 14px; cursor: pointer; font-weight: 600; font-size: 0.95rem; }
.profile-hint { display: block; font-weight: 400; color: var(--muted); font-size: 0.82rem; margin-left: 1.1em; }
.profile-body { padding: 0 14px 14px; display: grid; gap: 14px; }
.profile-numbers { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.num-field { display: grid; gap: 4px; font-size: 0.78rem; color: var(--muted); }
.num-field input { font: inherit; font-size: 0.9rem; color: var(--text); padding: 7px 9px; border: 1px solid var(--border); border-radius: 7px; background: var(--bg); width: 100%; }
.checks { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 0.88rem; }
.checks-list { display: grid; gap: 6px; }
.checks label, .toggle { display: flex; gap: 8px; align-items: flex-start; cursor: pointer; line-height: 1.35; }
.checks input, .toggle input { margin-top: 2px; flex: none; }
.toggle { font-weight: 600; font-size: 0.9rem; }
.fine { font-size: 0.8rem; color: var(--muted); margin: 0; }

/* ---------- content ---------- */
.intro { margin-bottom: 16px; }
.tagline { margin: 0 0 12px; font-size: 1.05rem; color: var(--muted); max-width: 70ch; }
.disclaimer { margin: 0; background: var(--warn-bg); border: 1px solid var(--warn-border); border-radius: 8px; padding: 10px 14px; font-size: 0.88rem; }
.toolbar { display: flex; align-items: center; gap: 12px; margin: 20px 0 12px; }
.filter-toggle { display: none; }
.result-count { color: var(--muted); font-size: 0.9rem; margin: 0; }

.rules { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.rule { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; }
.rule:target { border-color: var(--accent); }
.rule-head { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; font-size: 0.78rem; }
.status { display: inline-flex; align-items: center; gap: 6px; padding: 2px 10px; border-radius: 999px; font-weight: 600; }
.status .dot { width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
.status-live { background: var(--green-soft); color: var(--green); }
.status-transition { background: var(--orange-soft); color: var(--orange); }
.status-planned { background: var(--gray-soft); color: var(--gray); }
.jur { margin-left: auto; color: var(--muted); font-weight: 600; letter-spacing: 0.04em; }
.rel { padding: 2px 10px; border-radius: 999px; font-weight: 600; border: 1px solid; }
.rel-applies { color: var(--accent); border-color: var(--accent); }
.rel-check { color: var(--orange); border-color: var(--orange); }
.rel-exempt, .rel-no { color: var(--muted); border-color: var(--border); }
.rule-title { font-size: 1.1rem; margin: 10px 0 2px; line-height: 1.3; }
.rule-norm { margin: 0 0 8px; font-size: 0.9rem; }
.rule-norm a { text-decoration: none; font-weight: 600; }
.rule-summary { margin: 0 0 10px; }
.rule-facts { display: flex; flex-wrap: wrap; gap: 4px 22px; margin: 0 0 10px; font-size: 0.86rem; }
.rule-facts div { display: flex; gap: 6px; }
.rule-facts dt { color: var(--muted); }
.rule-facts dd { margin: 0; font-weight: 600; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag { font-size: 0.76rem; background: var(--gray-soft); color: var(--muted); padding: 2px 8px; border-radius: 6px; }
.rule-details { margin-top: 10px; border-top: 1px solid var(--border); padding-top: 8px; }
.rule-details > summary { cursor: pointer; color: var(--accent); font-size: 0.88rem; }
.rule-details h3 { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); margin: 16px 0 6px; }
.rule-details p, .rule-details ul { margin: 0 0 6px; }
.rule-details ul { padding-left: 20px; }
.reqs li::marker { content: "☐  "; }
.milestones time { font-weight: 600; margin-right: 6px; }
.badge { background: var(--warn-bg); border: 1px solid var(--warn-border); padding: 0 6px; border-radius: 4px; }
.empty { color: var(--muted); padding: 30px 0; text-align: center; }

/* ---------- fixed one-line footer ---------- */
.bottombar {
  position: fixed; inset: auto 0 0 0; z-index: 30; height: var(--footer-h);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid var(--border);
  font-size: 0.8rem; color: var(--muted);
}
.bottombar-inner {
  max-width: 1280px; height: 100%; margin: 0 auto; padding: 0 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  white-space: nowrap; overflow-x: auto; scrollbar-width: none;
}
.bottombar-inner::-webkit-scrollbar { display: none; }
.footer-meta { overflow: hidden; text-overflow: ellipsis; }
.footer-links { display: flex; align-items: center; gap: 14px; }
.footer-links a { color: var(--muted); text-decoration: none; }
.footer-links a:hover { color: var(--accent); }
.sep { width: 1px; height: 14px; background: var(--border); }

/* ---------- legal pages ---------- */
.page { max-width: 720px; margin: 32px auto; padding: 0 16px; }

/* ---------- tablet & mobile: sidebar becomes a drawer ---------- */
@media (max-width: 900px) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 0; padding-top: calc(var(--header-h) + 16px); }
  .sidebar {
    position: fixed; z-index: 25; top: var(--header-h); bottom: var(--footer-h); left: 0;
    width: min(380px, 100%); max-height: none;
    padding: 16px; background: var(--bg); border-right: 1px solid var(--border);
    transform: translateX(-102%); transition: transform 0.2s ease; visibility: hidden;
  }
  .filters-open .sidebar { transform: none; visibility: visible; box-shadow: 0 0 0 100vmax rgba(0, 0, 0, 0.35); }
  .sidebar-close { display: inline-flex; position: sticky; bottom: 0; width: 100%; }
  .filter-toggle { display: inline-flex; }
  .toolbar { position: sticky; top: var(--header-h); z-index: 5; background: var(--bg); margin: 12px -16px; padding: 8px 16px; }
  .footer-meta { display: none; }
  .bottombar-inner { justify-content: center; }
}

@media (max-width: 600px) {
  .brand { font-size: 1rem; }
  .btn { padding: 0 10px; font-size: 0.85rem; }
  .rule { padding: 14px; }
  .tagline { font-size: 0.95rem; }
}

@media (prefers-reduced-motion: reduce) {
  .sidebar { transition: none; }
}