/* Fonts are self-hosted (Latin subsets, see fonts/LICENSES.md). */
@font-face { font-family: "Atkinson Hyperlegible"; font-style: normal; font-weight: 400; font-display: swap; src: url("fonts/atkinson-hyperlegible-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "Atkinson Hyperlegible"; font-style: normal; font-weight: 700; font-display: swap; src: url("fonts/atkinson-hyperlegible-latin-700-normal.woff2") format("woff2"); }
@font-face { font-family: "Bricolage Grotesque"; font-style: normal; font-weight: 600; font-display: swap; src: url("fonts/bricolage-grotesque-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: "Bricolage Grotesque"; font-style: normal; font-weight: 700; font-display: swap; src: url("fonts/bricolage-grotesque-latin-700-normal.woff2") format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-style: normal; font-weight: 500; font-display: swap; src: url("fonts/jetbrains-mono-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-style: normal; font-weight: 700; font-display: swap; src: url("fonts/jetbrains-mono-latin-700-normal.woff2") format("woff2"); }

/* Layout: one column on graph paper. Copper accent, because copper is the conductor. */
:root {
  --bg: #edf1f2;
  --grid: #dbe3e5;
  --surface: #ffffff;
  --ink: #14262b;
  --muted: #53686e;
  --line: #c6d3d6;
  --accent: #b4531a;
  --accent-ink: #ffffff;
  --ok: #1b7a49;
  --ok-bg: #dcf2e4;
  --bad: #b3261e;
  --bad-bg: #fbe3e0;
  --f-display: "Bricolage Grotesque", "Trebuchet MS", system-ui, sans-serif;
  --f-body: "Atkinson Hyperlegible", "Segoe UI", system-ui, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1618; --grid: #142226; --surface: #152327; --ink: #e6eff0; --muted: #94aaaf;
    --line: #2a3b40; --accent: #e58a4b; --accent-ink: #1b0e05;
    --ok: #62d392; --ok-bg: #12331f; --bad: #ff8d84; --bad-bg: #3a1b19;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0d1618; --grid: #142226; --surface: #152327; --ink: #e6eff0; --muted: #94aaaf;
  --line: #2a3b40; --accent: #e58a4b; --accent-ink: #1b0e05;
  --ok: #62d392; --ok-bg: #12331f; --bad: #ff8d84; --bad-bg: #3a1b19;
  color-scheme: dark;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 17px;
  line-height: 1.5;
  padding-block: 28px 56px;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
#app { max-width: 720px; margin: 0 auto; }
h1, h2, h3 { font-family: var(--f-display); margin: 0; text-wrap: balance; line-height: 1.15; }
p { margin: 0; }
button { font: inherit; color: inherit; cursor: pointer; }
button:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.mono { font-family: var(--f-mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
svg { display: block; max-width: 100%; }
svg.ink { color: var(--ink); }

/* Home */
.hero { display: grid; grid-template-columns: 1fr auto; gap: 20px; align-items: center; margin-bottom: 28px; }
.hero h1 { font-size: clamp(34px, 8vw, 52px); margin: 8px 0 10px; }
.hero p { color: var(--muted); max-width: 46ch; }
.hero .fig { width: 170px; }
@media (max-width: 520px) { .hero { grid-template-columns: 1fr; } .hero .fig { width: 140px; order: -1; } }
.topics { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.chip { border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 4px 12px; font-size: 14px; }
.rounds { display: grid; gap: 10px; }
.round {
  display: grid; grid-template-columns: auto 1fr auto; gap: 16px; align-items: center;
  text-align: left; width: 100%;
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px;
}
.round:hover { border-color: var(--accent); }
.round .n { font-family: var(--f-display); font-weight: 700; font-size: 28px; color: var(--accent); min-width: 1.2ch; }
.round .t { font-weight: 700; }
.round .s { color: var(--muted); font-size: 14px; }
.badge { font-family: var(--f-mono); font-weight: 700; font-size: 14px; border: 1px solid var(--line); border-radius: 6px; padding: 4px 10px; white-space: nowrap; }
.badge.done { background: var(--ok-bg); color: var(--ok); border-color: transparent; }
.foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 22px; }
.link { background: none; border: none; color: var(--muted); text-decoration: underline; padding: 4px 0; font-size: 14px; }

/* Quiz */
.bar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.track { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; margin-bottom: 18px; }
.fill { height: 100%; background: var(--accent); transition: width .25s; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 22px; }
.card h2 { font-size: clamp(21px, 4.6vw, 26px); margin: 8px 0 16px; }
.qfig { display: flex; justify-content: center; margin: 4px 0 18px; padding: 14px; border: 1px dashed var(--line); border-radius: 8px; }
.qfig svg { width: min(300px, 100%); }
.qfig.sym svg { width: min(200px, 70%); }
.opts { display: grid; gap: 10px; }
.opts.figs { grid-template-columns: 1fr 1fr; }
@media (max-width: 460px) { .opts.figs { grid-template-columns: 1fr; } }
.opt {
  display: grid; grid-template-columns: auto 1fr; gap: 12px; align-items: center; text-align: left;
  background: var(--bg); border: 2px solid var(--line); border-radius: 10px; padding: 12px 14px; min-width: 0;
}
.opt:hover:not([disabled]) { border-color: var(--accent); }
.opt .l { font-family: var(--f-mono); font-weight: 700; width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; border: 2px solid var(--line); font-size: 13px; }
.opt .x { min-width: 0; overflow-wrap: anywhere; }
.opt.figopt { grid-template-columns: 1fr; justify-items: center; gap: 6px; }
.opt.figopt svg { width: 100%; max-width: 210px; }
.opt.ok { border-color: var(--ok); background: var(--ok-bg); }
.opt.ok .l { background: var(--ok); border-color: var(--ok); color: var(--bg); }
.opt.bad { border-color: var(--bad); background: var(--bad-bg); }
.opt.bad .l { background: var(--bad); border-color: var(--bad); color: var(--bg); }
.opt[disabled] { cursor: default; }
.opt[disabled]:not(.ok):not(.bad) { opacity: 0.6; }
.fb { margin-top: 18px; padding: 14px 16px; border-radius: 10px; }
.fb.ok { background: var(--ok-bg); }
.fb.bad { background: var(--bad-bg); }
.fb b { font-family: var(--f-display); font-size: 19px; }
.fb.ok b { color: var(--ok); }
.fb.bad b { color: var(--bad); }
.fb p { margin-top: 4px; }
.btn {
  background: var(--accent); color: var(--accent-ink); border: none; border-radius: 10px;
  padding: 12px 22px; font-weight: 700; font-size: 17px;
}
.btn.alt { background: var(--surface); color: var(--ink); border: 1px solid var(--line); }
.btn:hover { filter: brightness(1.06); }
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }

/* Result */
.score { display: flex; align-items: baseline; gap: 10px; margin: 6px 0 4px; }
.score b { font-family: var(--f-display); font-size: clamp(64px, 18vw, 96px); line-height: 1; color: var(--accent); }
.score span { font-family: var(--f-display); font-size: 30px; color: var(--muted); }
.brk { display: grid; gap: 12px; margin: 22px 0; }
.brk .row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4px 12px; }
.brk .meter { grid-column: 1 / -1; height: 8px; background: var(--line); border-radius: 4px; overflow: hidden; }
.brk .meter i { display: block; height: 100%; background: var(--accent); }
.rev { display: grid; gap: 12px; margin-top: 14px; }
.rev .item { border: 1px solid var(--line); border-left: 4px solid var(--bad); border-radius: 8px; padding: 12px 14px; background: var(--bg); }
.rev .q { font-weight: 700; }
.rev .you { color: var(--bad); font-size: 15px; margin-top: 4px; }
.rev .right { color: var(--ok); font-size: 15px; }
.rev .why { color: var(--muted); font-size: 15px; margin-top: 4px; }
.rev svg { width: 150px; margin-top: 6px; }
.missed { margin-bottom: 18px; }
.mrow { display: flex; justify-content: space-between; align-items: center; gap: 14px; flex-wrap: wrap; }
.mrow h3 { font-size: 22px; }
.missed .s { color: var(--muted); font-size: 15px; }
.missed details { margin-top: 12px; }
.missed summary { cursor: pointer; font-weight: 700; padding: 6px 0; }
.missed .item { border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 8px; padding: 12px 14px; background: var(--bg); display: grid; gap: 4px; }
.missed .q { font-weight: 700; }
.missed .right { color: var(--ok); font-size: 15px; }
.missed .why { color: var(--muted); font-size: 15px; }
.missed .item svg { width: 150px; }
@media (prefers-reduced-motion: reduce) { .fill { transition: none; } }

/* ---------- Added for the pack app ---------- */
.hero.plain { grid-template-columns: 1fr; }
.hero .src { font-size: 14px; color: var(--muted); margin-top: 6px; }
.hero .fig svg { width: 100%; }
.pack .n { font-size: 24px; }
.pack .badge { font-size: 13px; }
.stack { display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; margin-bottom: 18px; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; }
.panel h3 { font-size: 22px; margin-bottom: 4px; }
.panel .s { color: var(--muted); font-size: 15px; }
.fields { display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; margin-top: 14px; }
.fields label { font-weight: 700; font-size: 15px; display: block; margin-bottom: 4px; }
.fields input[type=file] { font: inherit; width: 100%; max-width: 100%; }
textarea.paste {
  width: 100%; min-height: 150px; resize: vertical;
  font-family: var(--f-mono); font-size: 13px; line-height: 1.45;
  color: var(--ink); background: var(--bg); border: 2px solid var(--line); border-radius: 10px; padding: 10px 12px;
}
textarea.paste:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-color: var(--accent); }
.msg { border-radius: 10px; padding: 12px 14px; margin-top: 12px; font-size: 15px; }
.msg.bad { background: var(--bad-bg); }
.msg.ok { background: var(--ok-bg); }
.msg.warn { background: var(--bg); border: 1px solid var(--line); }
.msg b { font-family: var(--f-display); font-size: 17px; display: block; margin-bottom: 4px; }
.msg.bad b { color: var(--bad); }
.msg.ok b { color: var(--ok); }
.msg ul { margin: 4px 0 0; padding-left: 20px; }
.msg li { margin: 2px 0; overflow-wrap: anywhere; }
.rowact { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 12px; }
.linkrow { display: flex; gap: 18px; flex-wrap: wrap; }
.mini svg { width: 150px; margin-top: 6px; }
.rev .mini, .missed .mini { margin: 2px 0; }
.figtable { border-collapse: collapse; font-size: 15px; max-width: 100%; }
.figtable th, .figtable td { border: 1px solid var(--line); padding: 6px 12px; text-align: left; }
.figtable th { background: var(--bg); font-family: var(--f-mono); font-size: 13px; }
.qfig.tbl { overflow-x: auto; }
.opt.figopt .figtable { font-size: 13px; }
.opt .x .figtable { font-size: 13px; }
pre.export { margin: 0; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
[tabindex="-1"]:focus { outline: none; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.chipbtn { border: 2px solid var(--line); background: var(--bg); border-radius: 999px; padding: 6px 16px; font-weight: 700; }
.chipbtn:hover { border-color: var(--accent); }
.chipbtn[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
input.text {
  width: 100%; font: inherit; color: var(--ink); background: var(--bg);
  border: 2px solid var(--line); border-radius: 10px; padding: 10px 12px;
}
input.text:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-color: var(--accent); }
.panel a, .msg a { color: var(--accent); }

/* ---------- Parent view ---------- */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; margin: 14px 0; }
.tile { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; }
.tile .big { font-family: var(--f-display); font-weight: 700; font-size: 30px; line-height: 1.1; margin: 4px 0 2px; }
.tile .s { color: var(--muted); font-size: 14px; }
.strip { display: grid; grid-template-columns: repeat(14, minmax(0, 1fr)); gap: 4px; margin-top: 12px; }
.day { aspect-ratio: 1; border-radius: 6px; border: 1px solid var(--line); background: var(--bg); display: grid; place-items: center; font-family: var(--f-mono); font-size: 12px; font-weight: 700; color: var(--ink); }
.day.l1 { background: color-mix(in srgb, var(--accent) 30%, var(--surface)); border-color: transparent; }
.day.l2 { background: color-mix(in srgb, var(--accent) 55%, var(--surface)); border-color: transparent; }
.day.l3 { background: color-mix(in srgb, var(--accent) 80%, var(--surface)); border-color: transparent; color: var(--accent-ink); }
.chart { width: 100%; height: auto; margin: 8px 0; }
.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .axis { fill: var(--muted); font-size: 12px; font-family: var(--f-mono); }
.chart .val { fill: var(--ink); font-size: 12px; font-weight: 700; font-family: var(--f-mono); }
.chart .mark { fill: var(--accent); }
details summary { cursor: pointer; font-weight: 700; padding: 6px 0; }
details .figtable { margin-top: 8px; width: 100%; }
select.text { width: 100%; font: inherit; color: var(--ink); background: var(--bg); border: 2px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.panel .rev { margin-top: 10px; }