/* RuneScape UF: drop the font file at assets/fonts/runescape_uf.ttf.
   Until then the pixel font VT323 (Google Fonts) is used. */
@font-face {
  font-family: "RuneScape UF";
  src: url("fonts/runescape_uf.ttf") format("truetype");
  font-display: swap;
}

/* ── Palettes ─────────────────────────────────────────────────
   Follows the device setting: dark → gold on charcoal, light → paper.
   The header toggle sets data-palette="gold" or "paper" on <html> to override. */
:root {
  --bg: #0f0f0d;
  --surface: #181815;
  --ink: #ece8dc;          /* body text: warm off-white */
  --ink-2: #bdb8a9;
  --ink-3: #7d7869;
  --heading: #f5c518;      /* gold */
  --accent: #f5c518;
  --accent-soft: #2a2410;
  --link: #f5c518;
  --line: #2c2a24;
  --easy: #6fcf8f;   --easy-bg: #15281c;
  --medium: #f0a54a; --medium-bg: #2e2112;
  --hard: #f07a72;   --hard-bg: #2f1715;
  --code-bg: #22211c;
  --radius: 8px;
  --shadow: 0 1px 0 rgba(255,255,255,.03) inset;
  --display: "RuneScape UF", "VT323", ui-monospace, monospace;
  --sans: "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  color-scheme: dark;
}
:root[data-palette="paper"] {
  --bg: #faf7ef; --surface: #ffffff; --ink: #1c1b19; --ink-2: #4f4b43; --ink-3: #8b867c;
  --heading: #1c1b19; --accent: #ffd60a; --accent-soft: #fff6c7; --link: #8a6d00;
  --line: #e6e1d4; --code-bg: #f3efe4;
  --easy: #2f7d4f; --easy-bg: #e3f2e8; --medium: #a3640b; --medium-bg: #fbeed8;
  --hard: #b23a3a; --hard-bg: #f8e3e1;
  --shadow: 0 1px 2px rgba(0,0,0,.05);
  color-scheme: light;
}
@media (prefers-color-scheme: light) {
  :root:not([data-palette]) {
    --bg: #faf7ef; --surface: #ffffff; --ink: #1c1b19; --ink-2: #4f4b43; --ink-3: #8b867c;
    --heading: #1c1b19; --accent: #ffd60a; --accent-soft: #fff6c7; --link: #8a6d00;
    --line: #e6e1d4; --code-bg: #f3efe4;
    --easy: #2f7d4f; --easy-bg: #e3f2e8; --medium: #a3640b; --medium-bg: #fbeed8;
    --hard: #b23a3a; --hard-bg: #f8e3e1;
    --shadow: 0 1px 2px rgba(0,0,0,.05);
    color-scheme: light;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--ink);
  font: 15px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font: inherit; color: inherit; cursor: pointer; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.wrap.narrow { max-width: 780px; }

/* header */
.top {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.top .wrap { display: flex; align-items: center; gap: 16px; height: 58px; }
.brand { font-weight: 600; color: var(--ink); letter-spacing: -.01em; display: flex; align-items: center; gap: 10px; }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 26px; height: 26px; border-radius: 7px; background: var(--accent);
  color: var(--surface); display: grid; place-items: center;
  font: 600 13px var(--mono);
}
.top nav { margin-left: auto; display: flex; gap: 4px; align-items: center; }
.icon-btn {
  border: 1px solid var(--line); background: transparent; border-radius: 8px;
  padding: 6px 10px; font-size: 13px; color: var(--ink-2);
}
.icon-btn:hover { color: var(--ink); border-color: var(--ink-3); }

.auth-slot { display: flex; align-items: center; gap: 6px; margin-left: 4px; }
.auth-slot:empty { display: none; }
.me { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--ink-2); }
.me img { width: 24px; height: 24px; border-radius: 50%; }
.signin-banner {
  display: flex; gap: 12px; align-items: center; justify-content: space-between; flex-wrap: wrap;
  background: var(--accent-soft); border: 1px solid var(--accent); border-radius: var(--radius);
  padding: 12px 16px; margin-top: 20px; font-size: 14px;
}
.gate { padding: 6px 0 2px; }
.gate p { margin: 0 0 10px; color: var(--ink-2); font-size: 14px; }

/* hero + stats */
.hero { padding: 36px 0 20px; }
.hero h1 { margin: 0 0 6px; font-size: 28px; line-height: 1.2; letter-spacing: -.02em; font-weight: 600; }
.hero p { margin: 0; color: var(--ink-2); max-width: 640px; }

.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 22px 0 8px;
}
.stat {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 16px; box-shadow: var(--shadow);
}
.stat .label { font-size: 12px; color: var(--ink-3); text-transform: uppercase; letter-spacing: .06em; }
.stat .value { font: 600 24px/1.3 var(--mono); }
.stat .sub { font-size: 12px; color: var(--ink-3); }

.topic-progress {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 8px 24px; margin: 18px 0 6px;
}
.tp { display: grid; grid-template-columns: 1fr auto; gap: 2px 8px; font-size: 13px; cursor: pointer; }
.tp .name { color: var(--ink-2); }
.tp.active .name { color: var(--accent); font-weight: 600; }
.tp .count { font-family: var(--mono); color: var(--ink-3); font-size: 12px; }
.bar { grid-column: 1 / -1; height: 4px; background: var(--line); border-radius: 4px; overflow: hidden; }
.bar > span { display: block; height: 100%; background: var(--accent); border-radius: 4px; }

/* filters */
.filters {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  padding: 16px 0; border-top: 1px solid var(--line); margin-top: 18px;
  position: sticky; top: 0; background: var(--bg); z-index: 5;
}
.search {
  flex: 1 1 240px; min-width: 0;
  border: 1px solid var(--line); background: var(--surface); border-radius: 8px;
  padding: 8px 12px; font: inherit; color: var(--ink);
}
.search:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
select {
  border: 1px solid var(--line); background: var(--surface); border-radius: 8px;
  padding: 8px 10px; font: inherit; font-size: 14px; color: var(--ink);
}
.result-count { font-size: 13px; color: var(--ink-3); margin-left: auto; font-family: var(--mono); }
.link-btn { border: 0; background: none; color: var(--accent); font-size: 13px; padding: 4px; }

/* table */
.qtable {
  width: 100%; border-collapse: separate; border-spacing: 0;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); margin-bottom: 48px;
}
.qtable th {
  text-align: left; font-size: 12px; font-weight: 500; color: var(--ink-3);
  text-transform: uppercase; letter-spacing: .06em; padding: 10px 14px;
  border-bottom: 1px solid var(--line); white-space: nowrap; user-select: none;
}
.qtable th[data-sort] { cursor: pointer; }
.qtable th[data-sort]:hover { color: var(--ink); }
.qtable th .arrow { font-size: 10px; margin-left: 2px; }
.qtable td { padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.qtable tr:last-child td { border-bottom: 0; }
.qtable tbody tr { cursor: pointer; }
.qtable tbody tr:hover td { background: var(--accent-soft); }
.qtable .title a { color: var(--ink); font-weight: 500; }
.qtable .title .tags { display: block; font-size: 12px; color: var(--ink-3); margin-top: 1px; }
.qtable .num { font-family: var(--mono); font-size: 13px; color: var(--ink-2); text-align: center; }
.qtable .muted { color: var(--ink-3); font-size: 13px; }
.col-status { width: 44px; text-align: center; }
.empty { text-align: center; color: var(--ink-3); padding: 40px 16px !important; }

.dot {
  display: inline-block; width: 18px; height: 18px; border-radius: 50%;
  border: 1.5px solid var(--line); vertical-align: middle; position: relative;
}
.dot.solved { background: var(--easy); border-color: var(--easy); }
.dot.solved::after {
  content: ""; position: absolute; left: 5px; top: 2px; width: 4px; height: 8px;
  border: solid var(--surface); border-width: 0 2px 2px 0; transform: rotate(45deg);
}
.dot.review { border-color: var(--medium); background: var(--medium-bg); }
.dot.review::after {
  content: ""; position: absolute; left: 5px; top: 5px; width: 5px; height: 5px;
  border-radius: 50%; background: var(--medium);
}

.chip {
  display: inline-block; font-size: 12px; font-weight: 500; padding: 2px 9px;
  border-radius: 999px; white-space: nowrap; background: var(--code-bg); color: var(--ink-2);
}
.chip.Easy { background: var(--easy-bg); color: var(--easy); }
.chip.Medium { background: var(--medium-bg); color: var(--medium); }
.chip.Hard { background: var(--hard-bg); color: var(--hard); }
.chip.outline { background: transparent; border: 1px solid var(--line); }

.star { color: var(--medium); font-size: 13px; margin-left: 4px; }

/* question page */
.crumbs { font-size: 13px; color: var(--ink-3); padding: 24px 0 6px; }
.crumbs a { color: var(--ink-3); }
.q-head h1 { font-size: 26px; line-height: 1.25; letter-spacing: -.02em; margin: 4px 0 12px; font-weight: 600; }
.q-meta { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin-bottom: 20px; }
.q-meta .bm {
  margin-left: auto; border: 1px solid var(--line); background: var(--surface);
  border-radius: 8px; padding: 4px 10px; font-size: 13px; color: var(--ink-2);
}
.q-meta .bm.on { color: var(--medium); border-color: var(--medium); }

.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 22px; margin-bottom: 14px; box-shadow: var(--shadow);
}
.card h2 {
  font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-3);
  font-weight: 600; margin: 0 0 10px;
}
.reveal-row { display: flex; gap: 8px; flex-wrap: wrap; margin: 4px 0 14px; }
.btn {
  border: 1px solid var(--line); background: var(--surface); border-radius: 8px;
  padding: 8px 14px; font-size: 14px; font-weight: 500;
}
.btn:hover { border-color: var(--ink-3); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--surface); }
.btn.primary:hover { filter: brightness(1.05); }
.hidden { display: none !important; }

.timer { font-family: var(--mono); font-size: 14px; color: var(--ink-2); margin-left: auto; align-self: center; }

.log { border-top: 1px dashed var(--line); padding-top: 14px; margin-top: 4px; }
.log-buttons { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0; }
.log-buttons .btn.s { color: var(--easy); }
.log-buttons .btn.p { color: var(--medium); }
.log-buttons .btn.f { color: var(--hard); }
.note {
  width: 100%; border: 1px solid var(--line); border-radius: 8px; background: var(--bg);
  padding: 8px 10px; font: inherit; font-size: 14px; color: var(--ink); resize: vertical; min-height: 40px;
}
.history { list-style: none; padding: 0; margin: 12px 0 0; font-size: 13px; }
.history li { display: flex; gap: 10px; padding: 6px 0; border-top: 1px solid var(--line); align-items: baseline; }
.history .when { color: var(--ink-3); font-family: var(--mono); font-size: 12px; min-width: 128px; }
.history .res-solved { color: var(--easy); font-weight: 500; }
.history .res-partial { color: var(--medium); font-weight: 500; }
.history .res-failed { color: var(--hard); font-weight: 500; }
.history .n { color: var(--ink-2); }

.pager { display: flex; justify-content: space-between; gap: 12px; margin: 20px 0 56px; font-size: 14px; }
.pager a { max-width: 48%; }

/* markdown content */
.md > :first-child { margin-top: 0; }
.md > :last-child { margin-bottom: 0; }
.md p, .md ul, .md ol { margin: 0 0 12px; }
.md li { margin: 3px 0; }
.md strong { font-weight: 600; }
.md code {
  font-family: var(--mono); font-size: .88em; background: var(--code-bg);
  padding: 1px 5px; border-radius: 4px;
}
.md pre {
  background: var(--code-bg); border-radius: 8px; padding: 14px 16px; overflow-x: auto;
  font-size: 13px; line-height: 1.55; margin: 0 0 12px;
}
.md pre code { background: none; padding: 0; font-size: inherit; }
.md table { border-collapse: collapse; margin: 0 0 12px; font-size: 14px; display: block; overflow-x: auto; }
.md th, .md td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; }
.md th { background: var(--code-bg); font-weight: 600; }

footer { border-top: 1px solid var(--line); color: var(--ink-3); font-size: 13px; padding: 20px 0 32px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; }

/* mobile */
@media (max-width: 720px) {
  .me-name { display: none; }
  .top nav .icon-btn { padding: 6px 8px; }
  .hero h1 { font-size: 23px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .qtable .hide-sm { display: none; }
  .qtable td, .qtable th { padding: 10px 10px; }
  .q-head h1 { font-size: 22px; }
  .card { padding: 16px; }
  .history .when { min-width: 96px; }
}

/* ── RuneScape-style display type ───────────────────────────── */
.brand, .hero h1, .q-head h1, .card h2, .stat .label, .stat .value,
.qtable th, .chip, .btn, .icon-btn, .link-btn, .crumbs, .tp, .result-count,
.signin-banner, .gate p, .pager, .log-buttons .btn, select, .search {
  font-family: var(--display);
  letter-spacing: .02em;
}
.hero h1 { font-size: 40px; font-weight: 400; }
.q-head h1 { font-size: 34px; font-weight: 400; }
.card h2 { font-size: 18px; font-weight: 400; color: var(--ink); }
.stat .label { font-size: 15px; }
.stat .value { font-size: 32px; font-weight: 400; }
.qtable th { font-size: 15px; font-weight: 400; color: var(--ink-2); }
.chip { font-size: 15px; font-weight: 400; padding: 0 9px; }
.btn, .icon-btn { font-size: 17px; font-weight: 400; }
.link-btn, .crumbs, .tp, .result-count, .pager { font-size: 16px; }
select, .search { font-size: 17px; }
.qtable .title a { color: var(--ink); }
.brand { font-size: 22px; font-weight: 400; }
.brand-mark { background: var(--accent); color: #000; font-family: var(--display); font-size: 15px; }
.btn.primary { background: var(--accent); color: #000; border-color: var(--accent); }
.btn.primary:hover { filter: brightness(.9); }
.bar > span { background: var(--accent); }
.dot.solved::after { border-color: #000; }
.qtable tbody tr:hover td { background: var(--accent-soft); }
a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.qtable .title a, .brand, .crumbs a, .pager a { text-decoration: none; }
.md p, .md li { color: var(--ink-2); }
.md strong { color: var(--ink); }
.md code { color: var(--ink); }
.video { position: relative; aspect-ratio: 16 / 9; border-radius: 6px; overflow: hidden; background: #000; border: 1px solid var(--line); }
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
@media (max-width: 720px) {
  .hero h1 { font-size: 30px; }
  .q-head h1 { font-size: 27px; }
}

/* palette-aware colors */
a { color: var(--link); }
.hero h1, .q-head h1, .brand { color: var(--heading); }
.card h2, .stat .label { color: var(--ink-3); }
.stat .value { color: var(--ink); }
.qtable .title a { color: var(--ink); }
.qtable th { color: var(--ink-3); }
.md p, .md li { color: var(--ink); }
.md strong, .md code { color: var(--ink); }
.btn.primary, .brand-mark { color: #111; }
.top { background: var(--surface); }
.hero p { color: var(--ink-2); }
.link-btn { color: var(--link); }

/* ── Multiple choice ───────────────────────────────────────── */
.mcq { display: grid; gap: 8px; margin-bottom: 14px; }
.opt {
  display: flex; align-items: flex-start; gap: 12px; cursor: pointer;
  border: 1px solid var(--line); border-radius: var(--radius); padding: 11px 14px;
  background: var(--bg); transition: border-color .12s, background .12s;
}
.opt:hover:not(.locked) { border-color: var(--accent); }
.opt input { position: absolute; opacity: 0; pointer-events: none; }
.opt-key {
  flex: none; width: 26px; height: 26px; border-radius: 6px; display: grid; place-items: center;
  border: 1px solid var(--line); font-family: var(--display); font-size: 16px; color: var(--ink-2);
}
.opt-text { padding-top: 2px; color: var(--ink); }
.opt-text code { font-family: var(--mono); font-size: .88em; background: var(--code-bg); padding: 1px 5px; border-radius: 4px; }
.opt:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.opt:has(input:checked) .opt-key { background: var(--accent); border-color: var(--accent); color: #111; }
.opt:has(input:focus-visible) { outline: 2px solid var(--accent); outline-offset: 2px; }
.opt.locked { cursor: default; }
.opt.locked.correct { border-color: var(--easy); background: var(--easy-bg); }
.opt.locked.correct .opt-key { background: var(--easy); border-color: var(--easy); color: #fff; }
.opt.locked.wrong { border-color: var(--hard); background: var(--hard-bg); }
.opt.locked.wrong .opt-key { background: var(--hard); border-color: var(--hard); color: #fff; }
.opt.locked.missed { border-color: var(--easy); border-style: dashed; }
.opt.locked.missed .opt-key { border-color: var(--easy); color: var(--easy); }
.mcq-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.mcq-result { font-family: var(--display); font-size: 18px; }
.mcq-result.ok { color: var(--easy); }
.mcq-result.bad { color: var(--hard); }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* ── Sign-in page ──────────────────────────────────────────── */
.auth-wrap { min-height: calc(100vh - 58px); display: grid; place-items: center; padding: 40px 16px 64px; }
.auth-card {
  width: 100%; max-width: 420px; background: var(--surface); border: 1px solid var(--line);
  border-radius: 14px; padding: 32px 28px 24px; box-shadow: var(--shadow);
}
.auth-hey { font-family: var(--display); font-size: 22px; color: var(--ink-2); margin: 0 0 4px; }
.auth-title { font-family: var(--display); font-weight: 400; font-size: 32px; line-height: 1.15; color: var(--heading); margin: 0 0 8px; letter-spacing: .01em; }
.auth-sub { color: var(--ink-2); margin: 0 0 22px; font-size: 15px; }
.auth-google {
  width: 100%; display: flex; align-items: center; justify-content: center; gap: 10px;
  padding: 11px 14px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--bg); color: var(--ink); font: 500 15px var(--sans);
}
.auth-google:hover { border-color: var(--ink-3); }
.auth-google:disabled { opacity: .5; cursor: not-allowed; }
.auth-or { display: flex; align-items: center; gap: 12px; color: var(--ink-3); font-size: 13px; margin: 18px 0; }
.auth-or::before, .auth-or::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.auth-label { display: block; font-size: 13px; font-weight: 500; color: var(--ink-2); margin-bottom: 6px; }
.auth-input {
  width: 100%; padding: 11px 12px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--bg); color: var(--ink); font: 15px var(--sans);
}
.auth-input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.auth-submit { width: 100%; margin-top: 12px; padding: 11px 14px; border-radius: 10px; }
.auth-fine { font-size: 13px; color: var(--ink-3); margin: 10px 0 0; }
.auth-error { color: var(--hard); background: var(--hard-bg); border-radius: 8px; padding: 9px 12px; font-size: 14px; margin: 16px 0 0; }
.auth-foot { font-size: 13px; color: var(--ink-3); border-top: 1px solid var(--line); margin: 22px 0 0; padding-top: 14px; }
#step-sent .link-btn { margin-top: 14px; padding: 0; }
@media (max-width: 480px) {
  .auth-card { padding: 24px 18px 18px; border-radius: 12px; }
  .auth-title { font-size: 27px; }
}

/* ── Header leaderboard link ───────────────────────────────── */
.nav-link { text-decoration: none; color: var(--ink-2); display: inline-flex; align-items: center; }
.nav-link:hover { text-decoration: none; color: var(--ink); }
@media (max-width: 720px) { .nav-link .lbl { display: none; } }

/* ── Solved / Unsolved status ──────────────────────────────── */
.qtable .col-status { width: 104px; text-align: left; }
.status { display: inline-block; font-family: var(--display); font-size: 15px; padding: 0 9px; border-radius: 999px; white-space: nowrap; }
.status.is-solved { background: var(--easy-bg); color: var(--easy); }
.status.is-solved::before { content: "✓ "; }
.status.is-unsolved { color: var(--ink-3); border: 1px solid var(--line); }

/* ── Streak card ───────────────────────────────────────────── */
.stat.streak .flame { font-size: 22px; }
.strip { display: flex; gap: 3px; margin: 4px 0 6px; }
.strip .day { flex: 1; height: 8px; border-radius: 2px; background: var(--line); }
.strip .day.on { background: var(--accent); }
.strip .day.today { outline: 1px solid var(--ink-3); outline-offset: 1px; }

/* ── Study tracks ──────────────────────────────────────────── */
.tracks-section { margin: 28px 0 4px; }
.section-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.section-head h2 { font-family: var(--display); font-weight: 400; font-size: 26px; margin: 0; color: var(--heading); }
.section-sub { color: var(--ink-3); font-size: 14px; }
.tracks { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.track {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; display: flex; flex-direction: column; gap: 8px; box-shadow: var(--shadow);
}
.track.active { border-color: var(--accent); }
.track-top { display: flex; justify-content: space-between; align-items: center; }
.track-count { font-size: 12px; color: var(--ink-3); }
.track h3 { font-family: var(--display); font-weight: 400; font-size: 21px; line-height: 1.2; margin: 0; color: var(--ink); }
.track p { margin: 0; font-size: 13.5px; color: var(--ink-2); flex: 1; }
.track-progress { display: flex; align-items: center; gap: 8px; }
.track-progress .bar { flex: 1; height: 5px; background: var(--line); border-radius: 4px; overflow: hidden; }
.track-progress .bar > span { display: block; height: 100%; background: var(--accent); }
.track-pct { font-family: var(--mono); font-size: 12px; color: var(--ink-3); }
.track-actions { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 2px; }
.track-actions .btn { text-decoration: none; padding: 6px 12px; font-size: 16px; }
.track-chip {
  display: inline-flex; align-items: center; gap: 4px; font-size: 13px; padding: 4px 4px 4px 10px;
  border-radius: 999px; background: var(--accent-soft); border: 1px solid var(--accent); color: var(--ink);
}
.track-chip b { font-weight: 600; }
.track-chip .link-btn { font-size: 16px; line-height: 1; padding: 0 6px; }
.track-bar {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap; font-size: 14px; color: var(--ink-2);
  background: var(--accent-soft); border: 1px solid var(--line); border-radius: var(--radius); padding: 8px 12px; margin: 4px 0 6px;
}
.track-bar a { font-weight: 600; text-decoration: none; }
.track-bar .bar { flex: 1; min-width: 80px; height: 5px; background: var(--line); border-radius: 4px; overflow: hidden; }
.track-bar .bar > span { display: block; height: 100%; background: var(--accent); }

/* ── Leaderboard ───────────────────────────────────────────── */
.lb-intro { color: var(--ink-2); margin: -4px 0 18px; }
.lb-me p { margin: 0 0 10px; color: var(--ink-2); }
.lb-me h2 { margin-bottom: 8px; }
.lb-join { display: flex; gap: 8px; flex-wrap: wrap; }
.lb-join .auth-input { flex: 1 1 220px; }
.lb-me-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.lb-me-name { font-family: var(--display); font-size: 22px; color: var(--heading); }
.lb-me-stats { color: var(--ink-2); font-size: 14px; }
.lb-tabs { display: flex; gap: 6px; margin: 18px 0 10px; }
.lb-tab { border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 5px 14px; font-family: var(--display); font-size: 17px; color: var(--ink-2); }
.lb-tab.on { background: var(--accent); border-color: var(--accent); color: #111; }
.lb-card { padding: 4px 0; }
.lb-table { width: 100%; border-collapse: collapse; }
.lb-table th { text-align: left; font-family: var(--display); font-weight: 400; font-size: 15px; color: var(--ink-3); padding: 10px 16px; border-bottom: 1px solid var(--line); }
.lb-table td { padding: 10px 16px; border-bottom: 1px solid var(--line); }
.lb-table tr:last-child td { border-bottom: 0; }
.lb-table .rank { width: 48px; font-family: var(--mono); color: var(--ink-3); }
.lb-table .n { text-align: right; font-family: var(--mono); width: 80px; }
.lb-table tr.is-me td { background: var(--accent-soft); }
.lb-name { display: inline-flex; align-items: center; gap: 10px; }
.avatar { width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; background: var(--code-bg); color: var(--ink-2); font: 600 11px var(--sans); flex: none; }
.you { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--accent); background: var(--accent-soft); padding: 1px 6px; border-radius: 4px; }
[data-palette="paper"] .you, :root:not([data-palette]) .you { color: var(--link); }
.lb-fine { font-size: 13px; color: var(--ink-3); margin: 10px 0 48px; }
@media (max-width: 480px) { .lb-table th, .lb-table td { padding: 9px 10px; } .lb-table .n { width: 56px; } }

/* ── Left navigation (bottom tab bar on phones) ────────────── */
:root { --nav-w: 208px; --top-h: 58px; }
body.with-nav .top { position: sticky; top: 0; z-index: 20; }
body.with-nav .top .wrap { max-width: none; padding: 0 20px; }
.sidenav {
  position: fixed; top: var(--top-h); left: 0; bottom: 0; width: var(--nav-w); z-index: 15;
  background: var(--surface); border-right: 1px solid var(--line);
  padding: 16px 10px; display: flex; flex-direction: column; gap: 4px;
}
.sidenav a {
  display: flex; align-items: center; gap: 12px; padding: 9px 12px; border-radius: 8px;
  color: var(--ink-2); text-decoration: none; font-family: var(--display); font-size: 20px; letter-spacing: .02em;
}
.sidenav a:hover { background: var(--accent-soft); color: var(--ink); text-decoration: none; }
.sidenav a.on { background: var(--accent-soft); color: var(--heading); box-shadow: inset 3px 0 0 var(--accent); }
.sidenav svg { flex: none; }
body.with-nav main, body.with-nav footer { padding-left: var(--nav-w); }
body.with-nav main.wrap, body.with-nav footer .wrap { box-sizing: content-box; }
body.with-nav .filters { top: var(--top-h); }

@media (max-width: 860px) {
  .sidenav {
    top: auto; bottom: 0; width: 100%; height: 62px; flex-direction: row; justify-content: space-around;
    padding: 6px 4px calc(6px + env(safe-area-inset-bottom)); border-right: 0; border-top: 1px solid var(--line);
  }
  .sidenav a { flex-direction: column; gap: 2px; font-size: 14px; padding: 4px 8px; flex: 1; justify-content: center; }
  .sidenav a.on { box-shadow: inset 0 2px 0 var(--accent); }
  body.with-nav main, body.with-nav footer { padding-left: 0; }
  body.with-nav { padding-bottom: 70px; }
}

/* ── Page sections ─────────────────────────────────────────── */
.page-head { padding: 32px 0 8px; }
.page-head h1 { font-family: var(--display); font-weight: 400; font-size: 40px; margin: 0 0 6px; color: var(--heading); }
.page-head p { margin: 0 0 14px; color: var(--ink-2); max-width: 640px; }
.hero-cta { display: flex; gap: 10px; flex-wrap: wrap; margin: 18px 0 4px; }
.hero-cta .btn { text-decoration: none; }
.section-link { margin-left: auto; font-size: 15px; text-decoration: none; font-family: var(--display); }
.home-topics { margin: 30px 0 48px; }
.continue {
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  margin: 22px 0 0; padding: 16px 18px; border-radius: var(--radius);
  background: var(--accent-soft); border: 1px solid var(--accent);
}
.continue-label { font-family: var(--display); font-size: 15px; color: var(--ink-3); }
.continue-title { font-family: var(--display); font-size: 24px; color: var(--heading); line-height: 1.2; }
.continue-next { font-size: 14px; color: var(--ink-2); }
.continue .btn { text-decoration: none; }
.lb-sub { font-family: var(--display); font-weight: 400; font-size: 24px; margin: 0 0 4px; color: var(--ink); }
@media (max-width: 720px) { .page-head h1 { font-size: 32px; } }

/* layout fixes: gutters beside the nav, compact header on phones */
body.with-nav main, body.with-nav footer { padding-left: calc(var(--nav-w) + 32px); padding-right: 32px; }
.icon-btn, .brand { white-space: nowrap; }
@media (max-width: 860px) {
  body.with-nav main, body.with-nav footer { padding-left: 16px; padding-right: 16px; }
}
@media (max-width: 480px) {
  body.with-nav .top .wrap { padding: 0 12px; gap: 8px; }
  .brand { font-size: 18px; gap: 8px; }
  .top nav .icon-btn { font-size: 15px; padding: 5px 8px; }
  .hero h1 { font-size: 28px; }
}
.top .wrap { min-width: 0; }
.brand { min-width: 0; overflow: hidden; text-overflow: ellipsis; flex: 0 1 auto; }
.top nav { flex: none; }
body[data-page="community"] main { padding-top: 28px; }
.lb-table { table-layout: auto; }