/* CAIRN components. Every colour, font and duration comes from tokens.css. */
* { box-sizing: border-box; }
html { background: var(--cairn-surface-0); }
body {
  margin: 0; min-height: 100vh; color: var(--cairn-text); background: var(--cairn-asphalt);
  background-attachment: fixed; font-family: var(--cairn-font-ui); font-size: var(--cairn-size-body);
  line-height: 1.45; -webkit-font-smoothing: antialiased;
}
/* Ambient directive: night dimming and warmth as overlays, so glass blur still works. */
html::after, body::after { content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 90; }
html::after { background: var(--cairn-surface-0); opacity: calc(1 - var(--cairn-brightness)); transition: opacity var(--cairn-dur-drift) var(--cairn-ease); }
body::after { background: var(--cairn-night-tint); opacity: calc(var(--cairn-warmth) * 0.05); mix-blend-mode: soft-light; }
/* Yellow broken edge lines frame the viewport like the hard shoulder of an Irish road. */
body::before {
  content: ""; position: fixed; top: 0; bottom: 0; left: 10px; right: 10px; pointer-events: none; z-index: 0;
  background: var(--cairn-edge-dash) left / 2px 100% no-repeat, var(--cairn-edge-dash) right / 2px 100% no-repeat; opacity: 0.35;
}
button, input, select { font: inherit; color: inherit; }
a { color: var(--cairn-cyan); }
:focus-visible { outline: 2px solid var(--cairn-cyan); outline-offset: 3px; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- Glass panel + HUD brackets ---------- */
.glass {
  position: relative; background: var(--cairn-glass); backdrop-filter: var(--cairn-glass-frost); -webkit-backdrop-filter: var(--cairn-glass-frost);
  border: 1px solid var(--cairn-glass-border); border-radius: var(--cairn-radius-l); overflow: hidden;
}
.glass::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; background: var(--cairn-holo-gradient);
  background-size: 250% 100%; opacity: calc(0.4 * var(--cairn-motion));
  animation: holo-sweep var(--cairn-dur-sweep) linear infinite;
}
@keyframes holo-sweep { from { background-position: 120% 0; } to { background-position: -120% 0; } }
.bracket::after {
  content: ""; position: absolute; inset: 8px; pointer-events: none; border-radius: var(--cairn-radius-m);
  background:
    linear-gradient(var(--cairn-cyan-matte), var(--cairn-cyan-matte)) top left / 14px 1px no-repeat,
    linear-gradient(var(--cairn-cyan-matte), var(--cairn-cyan-matte)) top left / 1px 14px no-repeat,
    linear-gradient(var(--cairn-cyan-matte), var(--cairn-cyan-matte)) bottom right / 14px 1px no-repeat,
    linear-gradient(var(--cairn-cyan-matte), var(--cairn-cyan-matte)) bottom right / 1px 14px no-repeat;
}
.chrome { display: flex; align-items: center; gap: var(--cairn-space-3); padding: var(--cairn-space-3) var(--cairn-space-4); font-family: var(--cairn-font-mono); }
.chrome .bar { width: 32px; height: 3px; border-radius: 2px; background: var(--c, var(--cairn-gold)); }
.chrome .code { font-size: var(--cairn-size-micro); letter-spacing: 2px; text-transform: uppercase; color: var(--cairn-text-dim); }
.chrome .title { font-size: var(--cairn-size-pill); color: var(--cairn-text-muted); text-transform: uppercase; letter-spacing: 1px; }
.chrome .grow { flex: 1; }

/* ---------- Status dot (pulse bound to the due backlog via data-attention) ---------- */
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; background: var(--cairn-green); box-shadow: var(--cairn-glow-green); flex: none; }
.dot.live { animation: pulse var(--cairn-dur-pulse-calm) ease-in-out infinite; }
:root[data-attention="1"] .dot.due { background: var(--cairn-amber); box-shadow: var(--cairn-glow-amber); animation-duration: var(--cairn-dur-pulse-watch); }
:root[data-attention="2"] .dot.due { background: var(--cairn-amber); box-shadow: var(--cairn-glow-amber); animation-duration: var(--cairn-dur-pulse-urgent); }
.dot.hollow { background: transparent; border: 1.5px solid var(--cairn-text-dim); box-shadow: none; animation: none; }
.dot.learn { background: var(--cairn-gold-matte); box-shadow: none; }
.dot.col { background: var(--cairn-green-matte); box-shadow: none; }
.dot.duecard { background: var(--cairn-cyan); box-shadow: var(--cairn-glow-cyan); animation-duration: var(--cairn-dur-pulse-watch); }
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: calc(1 - 0.6 * var(--cairn-motion)); transform: scale(calc(1 - 0.25 * var(--cairn-motion))); } }

/* ---------- Header: route sign, sign-style nav, telemetry ---------- */
.top {
  position: sticky; top: 0; z-index: 30; display: flex; align-items: center; flex-wrap: wrap; gap: var(--cairn-space-3) var(--cairn-space-5);
  padding: var(--cairn-space-3) var(--cairn-space-6); background: var(--cairn-glass-strong);
  backdrop-filter: var(--cairn-glass-frost); -webkit-backdrop-filter: var(--cairn-glass-frost);
}
.top::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: var(--cairn-lane-dash); opacity: 0.5; }
.route {
  display: flex; flex-direction: column; justify-content: center; padding: 6px 16px 5px; min-height: var(--cairn-touch);
  background: var(--cairn-route); border: 2px solid var(--cairn-route-edge); border-radius: var(--cairn-radius-s);
  color: var(--cairn-text-bright); text-decoration: none; line-height: 1.05;
}
.ga { font-family: var(--cairn-font-ui); font-style: italic; font-weight: 500; font-size: var(--cairn-size-data); letter-spacing: 0.5px; color: var(--cairn-text-bright); opacity: 0.92; }
.en { font-family: var(--cairn-font-display); font-weight: 800; font-size: var(--cairn-size-ui); letter-spacing: 2px; text-transform: uppercase; }
.route .en { font-size: var(--cairn-size-display-s); letter-spacing: 4px; }
.nav { display: flex; gap: var(--cairn-space-2); flex-wrap: wrap; }
.nav a {
  display: flex; flex-direction: column; justify-content: center; min-height: var(--cairn-touch); padding: 4px 14px;
  text-decoration: none; color: var(--cairn-text); border: 1px solid var(--cairn-glass-border); border-radius: var(--cairn-radius-s);
  line-height: 1.1; transition: border-color var(--cairn-dur-short) var(--cairn-ease), background var(--cairn-dur-short) var(--cairn-ease);
}
.nav a .ga { font-size: var(--cairn-size-micro); color: var(--cairn-text-muted); }
.nav a .en { font-size: var(--cairn-size-data); letter-spacing: 1.5px; }
.nav a:hover { border-color: var(--cairn-glass-border-bright); background: var(--cairn-surface-3); }
.nav a[aria-current="page"] { border-color: var(--cairn-gold-matte); background: var(--cairn-surface-4); box-shadow: inset 0 -2px 0 var(--cairn-gold); }
.telemetry { margin-left: auto; display: flex; align-items: center; gap: var(--cairn-space-2); flex-wrap: wrap; }
.pill {
  display: inline-flex; align-items: center; gap: 6px; padding: 5px 11px; border-radius: 999px; white-space: nowrap;
  font-family: var(--cairn-font-mono); font-size: var(--cairn-size-pill); color: var(--cairn-text-muted);
  background: var(--cairn-surface-2); border: 1px solid var(--cairn-glass-border);
}
.pill b { font-weight: 400; color: var(--cairn-text-bright); font-size: var(--cairn-size-data); }
.plate {
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 6px; flex: none; cursor: help;
  background: var(--cairn-plate); color: var(--cairn-plate-ink); border: 2px solid var(--cairn-plate-ink);
  font-family: var(--cairn-font-display); font-weight: 800; font-size: var(--cairn-size-display-s);
}
.plate.full { color: var(--cairn-emerald-matte); border-color: var(--cairn-emerald-matte); }
.plate-wrap { display: flex; align-items: center; gap: var(--cairn-space-2); }
.plate-meter { width: 60px; height: 4px; border-radius: 2px; background: var(--cairn-surface-4); overflow: hidden; }
.plate-meter i { display: block; height: 100%; background: var(--cairn-gold); transition: width var(--cairn-dur-medium) var(--cairn-ease); }

main { position: relative; z-index: 1; max-width: 1320px; margin: 0 auto; padding: var(--cairn-space-5) var(--cairn-space-6) var(--cairn-space-6); }
:root[data-density="low"] .telemetry .pill.optional { display: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--cairn-space-2); min-height: var(--cairn-touch); padding: 10px 22px;
  border-radius: 999px; cursor: pointer; border: 1px solid var(--cairn-glass-border-bright); background: var(--cairn-surface-3);
  font-family: var(--cairn-font-display); font-weight: 800; font-size: var(--cairn-size-data); letter-spacing: 2px; text-transform: uppercase;
  color: var(--cairn-text-bright); text-decoration: none;
  transition: transform var(--cairn-dur-short) var(--cairn-ease), box-shadow var(--cairn-dur-short) var(--cairn-ease), background var(--cairn-dur-short) var(--cairn-ease);
}
.btn:hover { transform: translateY(-1px); background: var(--cairn-surface-4); }
.btn.go { background: var(--cairn-gold); color: var(--cairn-surface-0); border-color: var(--cairn-gold); }
.btn.go:hover { box-shadow: var(--cairn-glow-gold); background: var(--cairn-gold); }
.btn.ghost { background: transparent; }
.btn:disabled { opacity: 0.4; cursor: default; transform: none; box-shadow: none; }
.btn kbd, .key { font-family: var(--cairn-font-mono); font-size: var(--cairn-size-micro); color: var(--cairn-text-dim); border: 1px solid var(--cairn-slate-dim); border-radius: 4px; padding: 0 4px; }
.btn.go kbd { color: var(--cairn-surface-2); border-color: var(--cairn-gold-dim); }

/* ---------- Hub / summary ---------- */
.hub { display: grid; grid-template-columns: 1.4fr 1fr; gap: var(--cairn-space-4); margin-bottom: var(--cairn-space-5); }
.hub .glass { padding: var(--cairn-space-4) var(--cairn-space-5) var(--cairn-space-5); }
.hub h1 { margin: 0 0 var(--cairn-space-2); font-family: var(--cairn-font-display); font-weight: 800; font-size: var(--cairn-size-display-m); color: var(--cairn-text-bright); letter-spacing: 1px; }
.hub p { margin: 0 0 var(--cairn-space-4); color: var(--cairn-text); max-width: 60ch; }
.next-actions { display: flex; flex-wrap: wrap; gap: var(--cairn-space-3); }
.cat-bars { display: grid; gap: 7px; }
.cat-bar { display: grid; grid-template-columns: 140px 1fr 70px; gap: var(--cairn-space-3); align-items: center; font-size: var(--cairn-size-data); }
.cat-bar .lbl { color: var(--cairn-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cat-bar .track { height: 6px; border-radius: 3px; background: var(--cairn-surface-4); overflow: hidden; display: flex; }
.cat-bar .track i { display: block; height: 100%; }
.cat-bar .track .col { background: var(--c); }
.cat-bar .track .lrn { background: color-mix(in srgb, var(--c) 35%, transparent); }
.cat-bar .num { font-family: var(--cairn-font-mono); color: var(--cairn-text-muted); text-align: right; }

/* ---------- Filters ---------- */
.filters { display: flex; flex-wrap: wrap; align-items: center; gap: var(--cairn-space-2) var(--cairn-space-3); margin-bottom: var(--cairn-space-4); }
.chip {
  --c: var(--cairn-slate); display: inline-flex; align-items: center; gap: 7px; min-height: 36px; padding: 4px 12px 4px 8px; border-radius: 999px;
  cursor: pointer; background: var(--cairn-surface-2); color: var(--cairn-text-muted); border: 1px solid var(--cairn-glass-border);
  font-size: var(--cairn-size-data); transition: background var(--cairn-dur-short) var(--cairn-ease), color var(--cairn-dur-short) var(--cairn-ease), border-color var(--cairn-dur-short) var(--cairn-ease);
}
.chip .sw { width: 12px; height: 12px; border-radius: 3px; background: var(--c); }
.chip .n { font-family: var(--cairn-font-mono); font-size: var(--cairn-size-micro); color: var(--cairn-text-dim); }
.chip:hover { color: var(--cairn-text-bright); border-color: color-mix(in srgb, var(--c) 50%, transparent); }
.chip.on { color: var(--cairn-text-bright); background: color-mix(in srgb, var(--c) 16%, var(--cairn-surface-2)); border-color: var(--c); }
.search {
  flex: 1 1 220px; max-width: 360px; min-height: 40px; padding: 8px 14px; border-radius: 999px; outline: none;
  background: var(--cairn-surface-1); border: 1px solid var(--cairn-glass-border-bright); color: var(--cairn-text-bright);
}
.search:focus { border-color: var(--cairn-cyan-matte); }
.count { font-family: var(--cairn-font-mono); font-size: var(--cairn-size-pill); color: var(--cairn-text-dim); letter-spacing: 2px; }
.spacer { flex: 1; }

/* ---------- Card grid ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: var(--cairn-space-4); }
.tile {
  --c: var(--cairn-slate); all: unset; box-sizing: border-box; position: relative; cursor: zoom-in; display: flex; flex-direction: column;
  min-height: 210px; padding: var(--cairn-space-3); border-radius: var(--cairn-radius-m); background: var(--cairn-glass);
  border: 1px solid var(--cairn-glass-border); transition: transform var(--cairn-dur-short) var(--cairn-ease), border-color var(--cairn-dur-short) var(--cairn-ease), box-shadow var(--cairn-dur-short) var(--cairn-ease);
}
.tile::before { content: ""; position: absolute; top: 0; left: var(--cairn-space-3); width: 32px; height: 3px; border-radius: 0 0 2px 2px; background: var(--c); }
.tile:hover, .tile:focus-visible { transform: translateY(-3px); border-color: color-mix(in srgb, var(--c) 55%, transparent); box-shadow: var(--cairn-shadow-card); }
.tile .meta { display: flex; justify-content: space-between; align-items: center; font-family: var(--cairn-font-mono); font-size: var(--cairn-size-pill); color: var(--cairn-text-dim); }
.tile .art { flex: 1; display: grid; place-items: center; padding: var(--cairn-space-3) var(--cairn-space-2); }
.tile .art img { max-width: 100%; max-height: 120px; object-fit: contain; filter: var(--cairn-drop-tile); }
.tile .q { font-size: var(--cairn-size-body); color: var(--cairn-text-bright); line-height: 1.35; display: -webkit-box; -webkit-line-clamp: 5; -webkit-box-orient: vertical; overflow: hidden; }
.tile .cap { font-size: var(--cairn-size-data); color: var(--cairn-text-muted); min-height: 2.6em; line-height: 1.3; }
.tile.qa .art { place-items: start; }
.tile .state { display: inline-flex; align-items: center; gap: 5px; }
.tile.seen { border-color: color-mix(in srgb, var(--c) 30%, transparent); }
.tile.collected { border-color: var(--c); background: color-mix(in srgb, var(--c) 9%, var(--cairn-glass)); }
.tile.locked .cap { color: var(--cairn-text-dim); }
.empty { grid-column: 1 / -1; text-align: center; padding: var(--cairn-space-6); color: var(--cairn-text-dim); letter-spacing: 1px; }

/* ---------- Lightbox with flip ---------- */
.box { position: fixed; inset: 0; z-index: 60; display: none; align-items: center; justify-content: center; flex-direction: column; gap: var(--cairn-space-3); padding: var(--cairn-space-5); background: var(--cairn-scrim); backdrop-filter: blur(8px); }
.box.open { display: flex; }
body.box-open { overflow: hidden; }
.stage { perspective: 1800px; width: min(440px, 88vw); }
.flipper { position: relative; aspect-ratio: 5 / 7; transform-style: preserve-3d; transition: transform var(--cairn-dur-flip) var(--cairn-ease); cursor: pointer; }
.flipper.flipped { transform: rotateY(180deg); }
.flipper.snap { transition: none; }
.face {
  --c: var(--cairn-slate); position: absolute; inset: 0; backface-visibility: hidden; -webkit-backface-visibility: hidden; border-radius: var(--cairn-radius-l);
  display: flex; flex-direction: column; padding: var(--cairn-space-5); background: var(--cairn-surface-2); border: 1px solid color-mix(in srgb, var(--c) 45%, transparent);
  box-shadow: var(--cairn-shadow-card), inset 0 3px 0 var(--c); overflow: auto;
}
.face.back { transform: rotateY(180deg); }
.face .meta { display: flex; justify-content: space-between; font-family: var(--cairn-font-mono); font-size: var(--cairn-size-pill); color: var(--cairn-text-dim); letter-spacing: 1px; }
.face .art { flex: 1; display: grid; place-items: center; }
.face .art img { width: 82%; max-height: 300px; object-fit: contain; filter: var(--cairn-drop-art); }
.face .prompt { font-size: var(--cairn-size-display-s); color: var(--cairn-text-bright); line-height: 1.3; }
.face h2 { margin: var(--cairn-space-3) 0 var(--cairn-space-2); font-family: var(--cairn-font-display); font-weight: 800; font-size: var(--cairn-size-display-s); color: var(--cairn-text-bright); line-height: 1.2; }
.face .answer { font-size: var(--cairn-size-ui); color: var(--cairn-text-bright); line-height: 1.4; }
.face .mini { display: flex; gap: var(--cairn-space-3); align-items: center; margin-top: var(--cairn-space-2); }
.face .mini img { width: 64px; height: 64px; object-fit: contain; }
.flip-hint { font-family: var(--cairn-font-mono); font-size: var(--cairn-size-pill); color: var(--cairn-text-dim); text-align: center; margin-top: auto; padding-top: var(--cairn-space-3); letter-spacing: 1px; }
.note { margin-top: var(--cairn-space-3); padding: var(--cairn-space-2) var(--cairn-space-3); border-left: 3px solid var(--cairn-amber-matte); background: var(--cairn-amber-dim); border-radius: 0 var(--cairn-radius-s) var(--cairn-radius-s) 0; font-size: var(--cairn-size-data); color: var(--cairn-text-bright); }
.note b { color: var(--cairn-amber); font-weight: 600; }
.see { display: flex; flex-wrap: wrap; gap: 6px; margin-top: var(--cairn-space-3); align-items: center; }
.see .lbl { font-family: var(--cairn-font-mono); font-size: var(--cairn-size-micro); color: var(--cairn-text-dim); letter-spacing: 2px; text-transform: uppercase; }
.see button { --c: var(--cairn-slate); cursor: pointer; padding: 4px 10px; border-radius: 999px; border: 1px solid color-mix(in srgb, var(--c) 60%, transparent); background: var(--cairn-surface-3); font-size: var(--cairn-size-pill); color: var(--cairn-text-bright); }
.see button:hover { background: var(--cairn-surface-4); }
.srs-line { margin-top: var(--cairn-space-3); font-family: var(--cairn-font-mono); font-size: var(--cairn-size-pill); color: var(--cairn-text-muted); display: flex; align-items: center; gap: 6px; }
.box .controls { display: flex; gap: var(--cairn-space-3); align-items: center; }
.icon-btn { width: var(--cairn-touch); height: var(--cairn-touch); border-radius: 50%; cursor: pointer; display: grid; place-items: center; background: var(--cairn-surface-3); border: 1px solid var(--cairn-glass-border-bright); color: var(--cairn-text-bright); font-size: var(--cairn-size-ui); }
.icon-btn:hover { background: var(--cairn-surface-4); }
.box .close { position: absolute; top: var(--cairn-space-4); right: var(--cairn-space-4); }
.box .pos { font-family: var(--cairn-font-mono); font-size: var(--cairn-size-pill); color: var(--cairn-text-dim); min-width: 90px; text-align: center; }

/* ---------- Session (practice + test) ---------- */
.session { min-height: 520px; padding: var(--cairn-space-5); display: grid; place-items: center; text-align: center; }
.lead { font-size: var(--cairn-size-display-s); color: var(--cairn-text-bright); margin: 0 auto var(--cairn-space-4); max-width: 34ch; line-height: 1.35; }
.muted { color: var(--cairn-text-muted); font-size: var(--cairn-size-data); }
.kind { font-family: var(--cairn-font-mono); font-size: var(--cairn-size-pill); letter-spacing: 3px; text-transform: uppercase; color: var(--cairn-text-dim); margin-bottom: var(--cairn-space-4); }
.road { position: relative; width: 100%; max-width: 640px; height: 14px; margin: 0 auto var(--cairn-space-5); border-radius: 7px; background: var(--cairn-surface-1); border: 1px solid var(--cairn-glass-border); overflow: hidden; }
.road::after { content: ""; position: absolute; left: 6px; right: 6px; top: 6px; height: 2px; background: var(--cairn-lane-dash); opacity: 0.25; }
.road i { position: absolute; left: 0; top: 0; bottom: 0; background: linear-gradient(90deg, var(--cairn-gold-dim), var(--cairn-gold)); transition: width var(--cairn-dur-medium) var(--cairn-ease); }
.q-art img { max-width: min(300px, 70vw); max-height: 260px; object-fit: contain; filter: var(--cairn-drop-art); }
.q-text { font-size: var(--cairn-size-display-s); color: var(--cairn-text-bright); line-height: 1.35; max-width: 34ch; margin: 0 auto; }
.q-meaning { font-family: var(--cairn-font-display); font-weight: 800; font-size: var(--cairn-size-display-m); color: var(--cairn-text-bright); line-height: 1.2; max-width: 22ch; margin: 0 auto; }
.reveal { display: grid; grid-template-columns: minmax(200px, 300px) 1fr; gap: var(--cairn-space-6); align-items: center; text-align: left; width: 100%; max-width: 900px; }
.reveal .art { display: grid; place-items: center; }
.reveal .art img { width: 100%; max-height: 300px; object-fit: contain; filter: var(--cairn-drop-art); }
.reveal .qbox { font-size: var(--cairn-size-ui); color: var(--cairn-text); line-height: 1.4; padding: var(--cairn-space-4); border-radius: var(--cairn-radius-m); background: var(--cairn-surface-1); border: 1px solid var(--cairn-cyan-dim); }
.reveal h2 { margin: 0 0 var(--cairn-space-2); font-family: var(--cairn-font-display); font-weight: 800; font-size: var(--cairn-size-display-s); color: var(--cairn-text-bright); line-height: 1.25; }
.reveal .sub { font-family: var(--cairn-font-mono); font-size: var(--cairn-size-pill); color: var(--cairn-text-dim); letter-spacing: 2px; text-transform: uppercase; margin-bottom: var(--cairn-space-2); }
.reveal .answer { font-size: var(--cairn-size-ui); color: var(--cairn-text-bright); }
.after-answer { max-width: 680px; margin: var(--cairn-space-5) auto 0; text-align: left; }
.after-answer h2 { margin: 0 0 var(--cairn-space-2); font-family: var(--cairn-font-display); font-weight: 800; font-size: var(--cairn-size-display-s); color: var(--cairn-text-bright); }
.after-answer .sub { font-family: var(--cairn-font-mono); font-size: var(--cairn-size-pill); color: var(--cairn-text-dim); letter-spacing: 2px; text-transform: uppercase; margin-bottom: var(--cairn-space-2); }
.after-answer .answer { font-size: var(--cairn-size-ui); color: var(--cairn-text-bright); }
.verdict { font-family: var(--cairn-font-display); font-weight: 800; letter-spacing: 1px; font-size: var(--cairn-size-ui); margin-bottom: var(--cairn-space-2); }
.verdict.right { color: var(--cairn-right); }
.verdict.wrong { color: var(--cairn-wrong); }
.grades { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--cairn-space-2); margin-top: var(--cairn-space-5); }
.grade { min-height: 56px; cursor: pointer; padding: 8px 6px; border-radius: var(--cairn-radius-m); background: var(--cairn-surface-2); border: 1px solid var(--cairn-glass-border-bright); color: var(--cairn-text-bright); font-family: var(--cairn-font-display); font-weight: 800; font-size: var(--cairn-size-data); letter-spacing: 1px; text-transform: uppercase; transition: border-color var(--cairn-dur-short) var(--cairn-ease), background var(--cairn-dur-short) var(--cairn-ease); }
.grade small { display: block; font-family: var(--cairn-font-mono); font-weight: 400; font-size: var(--cairn-size-micro); color: var(--cairn-text-dim); letter-spacing: 1px; margin-top: 3px; text-transform: none; }
.grade:hover { background: var(--cairn-surface-3); }
.grade.again:hover, .grade.again.suggest { border-color: var(--cairn-wrong-matte); }
.grade.hard:hover, .grade.hard.suggest { border-color: var(--cairn-amber-matte); }
.grade.good:hover, .grade.good.suggest, .grade.easy:hover, .grade.easy.suggest { border-color: var(--cairn-right-matte); }
.grade.suggest { background: var(--cairn-surface-4); }
.keys { font-family: var(--cairn-font-mono); font-size: var(--cairn-size-micro); color: var(--cairn-text-dim); margin-top: var(--cairn-space-3); letter-spacing: 1px; }

/* Options (multiple choice) */
.options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--cairn-space-3); width: 100%; max-width: 780px; margin: var(--cairn-space-5) auto 0; }
.opt {
  position: relative; min-height: 64px; cursor: pointer; display: flex; align-items: center; gap: var(--cairn-space-3); text-align: left; padding: var(--cairn-space-3) var(--cairn-space-4);
  border-radius: var(--cairn-radius-m); background: var(--cairn-surface-2); border: 1px solid var(--cairn-glass-border-bright); color: var(--cairn-text-bright); font-size: var(--cairn-size-body);
  transition: border-color var(--cairn-dur-short) var(--cairn-ease), background var(--cairn-dur-short) var(--cairn-ease), transform var(--cairn-dur-micro) var(--cairn-ease);
}
.opt:hover:not(:disabled) { background: var(--cairn-surface-3); border-color: var(--cairn-cyan-matte); }
.opt:active:not(:disabled) { transform: scale(0.99); }
.opt .letter { flex: none; width: 28px; height: 28px; display: grid; place-items: center; border-radius: 6px; font-family: var(--cairn-font-mono); font-size: var(--cairn-size-data); color: var(--cairn-text-muted); border: 1px solid var(--cairn-slate-dim); }
.opt.img { justify-content: center; min-height: 150px; }
.opt.img img { max-width: 100%; max-height: 120px; object-fit: contain; }
.opt.img .letter { position: absolute; top: 8px; left: 8px; }
.opt.chosen { border-color: var(--cairn-cyan); background: var(--cairn-surface-4); box-shadow: var(--cairn-glow-cyan); }
.opt.chosen .letter { color: var(--cairn-cyan); border-color: var(--cairn-cyan-matte); }
.opt.right { border-color: var(--cairn-right-matte); background: color-mix(in srgb, var(--cairn-right) 10%, var(--cairn-surface-2)); }
.opt.right .letter { color: var(--cairn-right); border-color: var(--cairn-right-matte); }
.opt.wrong { border-color: var(--cairn-wrong-matte); background: color-mix(in srgb, var(--cairn-wrong) 10%, var(--cairn-surface-2)); }
.opt.wrong .letter { color: var(--cairn-wrong); border-color: var(--cairn-wrong-matte); }
.opt:disabled { cursor: default; }

/* Collection grid (practice) */
.dex-head { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: var(--cairn-space-3); margin: var(--cairn-space-6) 0 var(--cairn-space-3); }
.dex-head h3 { margin: 0; font-family: var(--cairn-font-mono); font-weight: 400; font-size: var(--cairn-size-pill); letter-spacing: 3px; text-transform: uppercase; color: var(--cairn-text-dim); }
.legend { display: flex; gap: var(--cairn-space-4); flex-wrap: wrap; font-size: var(--cairn-size-pill); color: var(--cairn-text-muted); }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }
.legend .l-none { background: var(--cairn-surface-2); border: 1px solid var(--cairn-slate-dim); }
.legend .l-learn { background: color-mix(in srgb, var(--cairn-gold) 15%, var(--cairn-surface-2)); border: 1px solid var(--cairn-gold-matte); }
.legend .l-col { background: var(--cairn-gold); }
.legend .l-due { width: 8px; height: 8px; border-radius: 50%; background: var(--cairn-cyan); }
.dex { display: grid; grid-template-columns: repeat(auto-fill, minmax(50px, 1fr)); gap: 6px; }
.dt {
  --c: var(--cairn-slate); position: relative; aspect-ratio: 1; border-radius: var(--cairn-radius-s); cursor: pointer; display: grid; place-items: center; padding: 3px;
  background: var(--cairn-surface-2); border: 1px solid var(--cairn-glass-border); font-family: var(--cairn-font-mono); font-size: var(--cairn-size-micro); color: var(--cairn-text-dim);
  transition: transform var(--cairn-dur-short) var(--cairn-ease);
}
.dt:hover { transform: translateY(-2px); }
.dt img { width: 100%; height: 100%; object-fit: contain; opacity: 0.25; filter: grayscale(1); }
.dt.learning { border-color: color-mix(in srgb, var(--c) 55%, transparent); background: color-mix(in srgb, var(--c) 10%, var(--cairn-surface-2)); color: var(--cairn-text); }
.dt.learning img { opacity: 0.75; filter: grayscale(0.4); }
.dt.collected { border-color: var(--c); background: color-mix(in srgb, var(--c) 22%, var(--cairn-surface-2)); color: var(--cairn-text-bright); }
.dt.collected img { opacity: 1; filter: none; }
.dt.due::after { content: ""; position: absolute; top: 3px; right: 3px; width: 7px; height: 7px; border-radius: 50%; background: var(--cairn-cyan); box-shadow: var(--cairn-glow-cyan); }

/* Controls row */
.controls-row { display: flex; flex-wrap: wrap; gap: var(--cairn-space-3); align-items: center; margin-bottom: var(--cairn-space-4); }
.select { min-height: 40px; padding: 6px 12px; border-radius: 999px; background: var(--cairn-surface-2); border: 1px solid var(--cairn-glass-border-bright); color: var(--cairn-text-bright); font-size: var(--cairn-size-data); }
.label { font-family: var(--cairn-font-mono); font-size: var(--cairn-size-micro); letter-spacing: 2px; text-transform: uppercase; color: var(--cairn-text-dim); }

/* ---------- Mock test ---------- */
.test-layout { display: grid; grid-template-columns: 1fr 260px; gap: var(--cairn-space-4); align-items: start; }
.test-main { padding: var(--cairn-space-5); min-height: 560px; display: flex; flex-direction: column; }
.test-main .qhead { display: flex; justify-content: space-between; align-items: center; gap: var(--cairn-space-3); margin-bottom: var(--cairn-space-4); }
.test-main .qnum { font-family: var(--cairn-font-mono); font-size: var(--cairn-size-data); letter-spacing: 2px; color: var(--cairn-text-muted); }
.test-main .qbody { flex: 1; text-align: center; display: flex; flex-direction: column; justify-content: center; gap: var(--cairn-space-4); }
.test-main .qfoot { display: flex; justify-content: space-between; gap: var(--cairn-space-3); margin-top: var(--cairn-space-5); flex-wrap: wrap; }
.side { padding: var(--cairn-space-4); position: sticky; top: 96px; }
.timer { font-family: var(--cairn-font-mono); font-size: var(--cairn-size-display-m); color: var(--cairn-text-bright); text-align: center; letter-spacing: 2px; }
.timer.warn { color: var(--cairn-amber); text-shadow: var(--cairn-glow-amber); }
.timer.crit { color: var(--cairn-red); text-shadow: var(--cairn-glow-red); animation: pulse var(--cairn-dur-pulse-urgent) ease-in-out infinite; }
.timer-sub { text-align: center; font-family: var(--cairn-font-mono); font-size: var(--cairn-size-micro); color: var(--cairn-text-dim); letter-spacing: 2px; margin-bottom: var(--cairn-space-4); }
.palette { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; margin-bottom: var(--cairn-space-4); }
.pal { min-height: 34px; cursor: pointer; border-radius: 6px; background: var(--cairn-surface-2); border: 1px solid var(--cairn-glass-border-bright); font-family: var(--cairn-font-mono); font-size: var(--cairn-size-pill); color: var(--cairn-text-muted); position: relative; }
.pal.done { background: var(--cairn-blue-dim); color: var(--cairn-text-bright); border-color: var(--cairn-blue-matte); }
.pal.flag::after { content: ""; position: absolute; top: 3px; right: 3px; width: 6px; height: 6px; border-radius: 50%; background: var(--cairn-amber); }
.pal.cur { outline: 2px solid var(--cairn-cyan); outline-offset: 1px; color: var(--cairn-text-bright); }
.pal.right { background: color-mix(in srgb, var(--cairn-right) 18%, var(--cairn-surface-2)); border-color: var(--cairn-right-matte); color: var(--cairn-text-bright); }
.pal.wrong { background: color-mix(in srgb, var(--cairn-wrong) 18%, var(--cairn-surface-2)); border-color: var(--cairn-wrong-matte); color: var(--cairn-text-bright); }
.flagbtn.on { border-color: var(--cairn-amber-matte); color: var(--cairn-amber); }
.modes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--cairn-space-4); width: 100%; max-width: 760px; margin: 0 auto var(--cairn-space-5); }
.mode {
  cursor: pointer; text-align: left; padding: var(--cairn-space-4) var(--cairn-space-5); border-radius: var(--cairn-radius-l); background: var(--cairn-surface-2);
  border: 1px solid var(--cairn-glass-border-bright); color: var(--cairn-text); transition: border-color var(--cairn-dur-short) var(--cairn-ease), background var(--cairn-dur-short) var(--cairn-ease);
}
.mode:hover { background: var(--cairn-surface-3); }
.mode.on { border-color: var(--cairn-gold); background: var(--cairn-surface-4); box-shadow: var(--cairn-glow-gold); }
.mode .en { display: block; color: var(--cairn-text-bright); margin-bottom: 4px; }
.mode .facts { font-family: var(--cairn-font-mono); font-size: var(--cairn-size-pill); color: var(--cairn-text-muted); }
.history { width: 100%; max-width: 760px; margin: var(--cairn-space-5) auto 0; text-align: left; }
.spark { width: 100%; height: 72px; display: block; }
.spark-meta { display: flex; justify-content: space-between; font-family: var(--cairn-font-mono); font-size: var(--cairn-size-micro); color: var(--cairn-text-dim); letter-spacing: 1px; margin-top: 4px; }
.result-plate { display: inline-flex; flex-direction: column; align-items: center; padding: var(--cairn-space-4) var(--cairn-space-6); border-radius: var(--cairn-radius-m); border: 3px solid var(--cairn-right-matte); background: var(--cairn-surface-1); margin-bottom: var(--cairn-space-4); }
.result-plate.fail { border-color: var(--cairn-wrong-matte); }
.result-plate .big { font-family: var(--cairn-font-display); font-weight: 800; font-size: var(--cairn-size-display-l); color: var(--cairn-text-bright); line-height: 1; }
.result-plate .word { font-family: var(--cairn-font-display); font-weight: 800; letter-spacing: 6px; font-size: var(--cairn-size-ui); color: var(--cairn-right); margin-top: var(--cairn-space-2); }
.result-plate.fail .word { color: var(--cairn-wrong); }
.breakdown { width: 100%; max-width: 640px; margin: var(--cairn-space-4) auto; text-align: left; }
.review { width: 100%; max-width: 900px; margin: var(--cairn-space-5) auto 0; text-align: left; display: grid; gap: var(--cairn-space-3); }
.rv { --c: var(--cairn-slate); display: grid; grid-template-columns: 90px 1fr; gap: var(--cairn-space-4); padding: var(--cairn-space-4); border-radius: var(--cairn-radius-m); background: var(--cairn-surface-2); border: 1px solid var(--cairn-glass-border); border-left: 3px solid var(--c); }
.rv img { width: 90px; height: 90px; object-fit: contain; }
.rv .qn { font-family: var(--cairn-font-mono); font-size: var(--cairn-size-micro); color: var(--cairn-text-dim); letter-spacing: 2px; }
.rv .p { color: var(--cairn-text-bright); margin: 2px 0 6px; }
.rv .yours { color: var(--cairn-wrong); font-size: var(--cairn-size-data); }
.rv .correct { color: var(--cairn-right); font-size: var(--cairn-size-data); }
.rv .why { color: var(--cairn-text-muted); font-size: var(--cairn-size-data); margin-top: 4px; }

/* ---------- Toast / error ---------- */
.toast { position: fixed; left: 50%; bottom: var(--cairn-space-5); transform: translateX(-50%); z-index: 80; padding: 10px 18px; border-radius: 999px; background: var(--cairn-glass-strong); border: 1px solid var(--cairn-glass-border-bright); color: var(--cairn-text-bright); font-size: var(--cairn-size-data); box-shadow: var(--cairn-shadow-card); }
.error-panel { max-width: 640px; margin: var(--cairn-space-6) auto; padding: var(--cairn-space-5); border-radius: var(--cairn-radius-l); border: 1px solid var(--cairn-red-matte); background: var(--cairn-red-dim); color: var(--cairn-text-bright); }
.error-panel code { font-family: var(--cairn-font-mono); }
footer { position: relative; z-index: 1; text-align: center; padding: var(--cairn-space-5) var(--cairn-space-4) var(--cairn-space-6); font-size: var(--cairn-size-pill); color: var(--cairn-text-dim); }
footer .codename { font-family: var(--cairn-font-mono); letter-spacing: 2px; color: var(--cairn-svc-cairn); }

/* ---------- Type-in (card copy reveals glyph by glyph; snapped when motion is off) ---------- */
.typing { border-right: 2px solid var(--cairn-cyan-matte); }

/* ---------- Mode-driven layout ---------- */
:root[data-mode="focus"] .hide-in-focus { display: none; }
:root[data-mode="focus"] .glass::before { animation-play-state: paused; }

@media (max-width: 900px) {
  .hub { grid-template-columns: 1fr; }
  .test-layout { grid-template-columns: 1fr; }
  .side { position: static; order: -1; }
  .palette { grid-template-columns: repeat(10, 1fr); }
  .timer { font-size: var(--cairn-size-display-s); }
}
@media (max-width: 700px) {
  .top { padding: var(--cairn-space-2) var(--cairn-space-4); gap: var(--cairn-space-2); }
  .telemetry { margin-left: 0; width: 100%; }
  .telemetry .pill.optional:not(.keep) { display: none; }
  main { padding: var(--cairn-space-4); }
  .grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: var(--cairn-space-3); }
  .reveal { grid-template-columns: 1fr; text-align: center; gap: var(--cairn-space-4); }
  .reveal .art img { max-width: 220px; }
  .options { grid-template-columns: 1fr; }
  .options.imgs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grades { grid-template-columns: repeat(2, 1fr); }
  .modes { grid-template-columns: 1fr; }
  .cat-bar { grid-template-columns: 110px 1fr 60px; }
  .rv { grid-template-columns: 64px 1fr; }
  .rv img { width: 64px; height: 64px; }
  .palette { grid-template-columns: repeat(8, 1fr); }
  body::before { display: none; }
}
@media (pointer: coarse) { .chip, .pal { min-height: var(--cairn-touch); } }
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }