/* ============================================================
   WordNerd UI components — vanilla translation of the Claude Design
   "night arena" kit (Bits.jsx). Pairs with wordnerd-ds.css (tokens).
   Class prefix: .wn-*  ·  state modifiers: .is-*
   ============================================================ */

/* ── Eyebrow / label ─────────────────────────────────────── */
.wn-eyebrow {
  font-family: var(--font-ui); font-weight: 800; font-size: 12px;
  letter-spacing: .07em; text-transform: uppercase; color: var(--fg-3);
}

/* ── Extruded "press-down" button ────────────────────────── */
.wn-btn {
  font-family: var(--font-display); font-weight: 800; font-size: 19px;
  border: none; border-radius: var(--r-lg); padding: 17px 24px; width: 100%;
  cursor: pointer; position: relative; display: inline-flex;
  align-items: center; justify-content: center; gap: 8px; line-height: 1.1;
  background: var(--brain); color: var(--fg-on-color);
  box-shadow: 0 6px 0 0 var(--brain-deep), var(--glow-brain);
  transition: transform 90ms var(--ease-out), box-shadow 90ms var(--ease-out), opacity .15s;
}
.wn-btn:active:not(:disabled):not(.is-disabled) {
  transform: translateY(6px); box-shadow: 0 0 0 0 var(--brain-deep), var(--glow-brain);
}
.wn-btn:disabled, .wn-btn.is-disabled { opacity: .45; cursor: default; }
.wn-btn--ai    { background: var(--ai);    color: var(--fg-on-color); box-shadow: 0 6px 0 0 var(--ai-deep), var(--glow-ai); }
.wn-btn--ai:active:not(:disabled):not(.is-disabled)    { box-shadow: 0 0 0 0 var(--ai-deep), var(--glow-ai); }
.wn-btn--brand { background: var(--brand); color: #fff;               box-shadow: 0 6px 0 0 var(--brand-deep), var(--glow-brand); }
.wn-btn--brand:active:not(:disabled):not(.is-disabled) { box-shadow: 0 0 0 0 var(--brand-deep), var(--glow-brand); }
.wn-btn--ghost {
  background: var(--ink-800); color: var(--fg-1); box-shadow: 0 6px 0 0 var(--ink-600);
}
.wn-btn--ghost:active:not(:disabled):not(.is-disabled) { box-shadow: 0 0 0 0 var(--ink-600); }

/* ── PIN entry (4 chunky cells) ──────────────────────────── */
.wn-pin { display: flex; gap: 10px; justify-content: center; }
.wn-pin-cell {
  width: 60px; height: 72px; border-radius: var(--r-md);
  background: var(--ink-800); border: 2px solid var(--ink-500);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-num); font-weight: 800; font-size: 32px; color: var(--fg-3);
  transition: border-color .15s, color .15s, box-shadow .15s;
}
.wn-pin-cell.filled { border-color: var(--brand); color: var(--fg-1); }
.wn-pin-cell.caret  { border-color: var(--brand); box-shadow: 0 0 0 4px rgba(124,92,255,.18); }

/* ── Text input ──────────────────────────────────────────── */
.wn-input {
  width: 100%; box-sizing: border-box;
  background: var(--ink-800); border: 2px solid var(--ink-500);
  border-radius: var(--r-md); padding: 15px 16px; color: var(--fg-1);
  font-family: var(--font-ui); font-weight: 600; font-size: 17px; outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.wn-input:focus { border-color: var(--brand); box-shadow: 0 0 0 4px rgba(124,92,255,.22); }
.wn-input::placeholder { color: var(--fg-3); }

/* ── Answer tile ─────────────────────────────────────────── */
.wn-tile {
  display: flex; align-items: center; gap: 14px; width: 100%; text-align: left;
  padding: 15px 16px; border-radius: var(--r-lg); cursor: pointer;
  border: 2px solid var(--ink-600); background: var(--ink-800); color: var(--fg-1);
  font-family: var(--font-ui); transition: border-color .14s var(--ease-out), box-shadow .14s, opacity .14s;
}
.wn-tile-key {
  font-family: var(--font-display); font-weight: 800; font-size: 17px;
  width: 36px; height: 36px; flex: none; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: var(--ink-700); color: var(--fg-2);
}
.wn-tile-label { font-weight: 700; font-size: 17px; }
.wn-tile.is-selected { border-color: var(--brand); box-shadow: 0 5px 0 0 var(--brand-deep), var(--glow-brand); }
.wn-tile.is-selected .wn-tile-key { background: var(--brand); color: #fff; }
.wn-tile.is-correct  { border-color: var(--correct); box-shadow: var(--glow-brain); }
.wn-tile.is-correct .wn-tile-key  { background: var(--correct); color: var(--fg-on-color); }
.wn-tile.is-wrong    { border-color: var(--wrong); opacity: .9; }
.wn-tile.is-wrong .wn-tile-key    { background: var(--wrong); color: #fff; }
.wn-tile.is-dim      { border-color: var(--ink-700); opacity: .4; }

/* ── Source badge (🧠/🔎/⚠️) ─────────────────────────────── */
.wn-badge {
  display: inline-flex; align-items: center; gap: 7px; border-radius: 999px;
  padding: 6px 12px; font-weight: 800; font-size: 13px; border: 2px solid currentColor;
}
.wn-badge--big   { padding: 9px 16px; font-size: 16px; }
.wn-badge--brain { color: var(--brain); background: rgba(184,255,61,.10); }
.wn-badge--ai    { color: var(--ai);    background: rgba(46,217,242,.10); }
.wn-badge--flag  { color: var(--flag);  background: rgba(255,173,31,.10); }

/* ── Brain Window draining bar ───────────────────────────── */
.wn-brainbar { width: 100%; }
.wn-brainbar-head  { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.wn-brainbar-label { font-family: var(--font-display); font-weight: 800; font-size: 14px; white-space: nowrap; }
.wn-brainbar-time  { font-family: var(--font-num); font-weight: 800; font-size: 20px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.wn-brainbar-track { height: 22px; border-radius: 999px; background: var(--ink-800); border: 2px solid var(--ink-600); overflow: hidden; position: relative; }
.wn-brainbar-fill  { position: absolute; inset: 0; transform-origin: left; border-radius: 999px; transition: transform 1s linear; }
.wn-brainbar.open   .wn-brainbar-label, .wn-brainbar.open   .wn-brainbar-time { color: var(--brain); }
.wn-brainbar.open   .wn-brainbar-fill { background: linear-gradient(90deg, var(--brain), var(--brain-bright)); box-shadow: var(--glow-brain); }
/* ⚡ Flash sub-window (first 6s) — gold, the relay-proof 4x top tier */
.wn-brainbar.flash  .wn-brainbar-label, .wn-brainbar.flash  .wn-brainbar-time { color: var(--flag-bright); }
.wn-brainbar.flash  .wn-brainbar-fill { background: linear-gradient(90deg, var(--flag), var(--flag-bright)); box-shadow: var(--glow-flag); }
.wn-brainbar.closed .wn-brainbar-label, .wn-brainbar.closed .wn-brainbar-time { color: var(--ai); }
.wn-brainbar.closed .wn-brainbar-fill { background: var(--ai); }
.wn-brainbar.curveball .wn-brainbar-label, .wn-brainbar.curveball .wn-brainbar-time { color: var(--wrong); }
.wn-brainbar.curveball .wn-brainbar-fill { background: var(--wrong); }

/* ── Copy-perk button (earned: copy the question text for AI research) ───── */
.wn-copy-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px; width: 100%;
  font-family: var(--font-display); font-weight: 800; font-size: 16px; cursor: pointer;
  padding: 13px 18px; border-radius: var(--r-md); line-height: 1.1;
  background: var(--ink-800); color: var(--ai); border: 2px dashed var(--ai);
  transition: transform 90ms var(--ease-out), background .15s, box-shadow .15s;
}
.wn-copy-btn:active { transform: translateY(2px); }
.wn-copy-btn.is-copied { background: rgba(46,217,242,.16); border-style: solid; box-shadow: var(--glow-ai); }
/* Discoverability hint shown only until the one-tap Copy button is earned */
.wn-copy-tip { font-size: 12px; font-weight: 700; color: var(--fg-3); text-align: center; line-height: 1.3; }

/* ── Proof-of-Thinking dashboard (student end + review) ──────────────────── */
.wn-pot { width: 100%; max-width: 460px; }
.wn-pot-headline {
  font-family: var(--font-display); font-weight: 800; font-size: 19px; line-height: 1.25;
  color: var(--fg-1); text-align: center; margin-bottom: 4px;
}
.wn-pot-headline b { color: var(--brain); }
.wn-pot-sub { font-size: 13px; color: var(--fg-2); text-align: center; margin-bottom: 14px; }
.wn-pot-chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.wn-pot-chip {
  display: inline-flex; align-items: center; gap: 7px; border-radius: 999px;
  padding: 7px 13px; font-weight: 800; font-size: 13px; font-variant-numeric: tabular-nums;
  background: var(--ink-800); border: 2px solid var(--ink-600); color: var(--fg-2);
}
.wn-pot-chip b { font-family: var(--font-num); }
.wn-pot-chip.brain    { color: var(--brain); border-color: rgba(184,255,61,.4); }
.wn-pot-chip.flash    { color: var(--flag-bright); border-color: rgba(255,173,31,.5); }
.wn-pot-chip.research { color: var(--ai); border-color: rgba(46,217,242,.4); }
.wn-pot-chip.flag     { color: var(--flag); border-color: rgba(255,173,31,.4); }
.wn-pot-chip.focus    { color: var(--brain-bright); border-color: rgba(184,255,61,.4); }
/* per-answer thinking stamp on the review list */
.wn-stamp { font-size: 15px; margin-right: 4px; }

/* ── Shop: a compact trigger + a slide-up bottom sheet (the teacher-led centerpiece) ───── */
.shop-trigger {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  padding: 8px 15px; border-radius: 999px; font-family: var(--font-display); font-weight: 800; font-size: 14px;
  background: var(--ink-800); border: 2px solid var(--ink-500); color: var(--fg-1);
  transition: transform 90ms var(--ease-out), border-color .15s;
}
.shop-trigger:active { transform: translateY(2px); }
.shop-trigger .bal   { color: var(--brain); font-family: var(--font-num); }
.shop-trigger .armed { color: var(--flag-bright); font-size: 13px; letter-spacing: 1px; }

.shop-sheet { position: fixed; inset: 0; z-index: 60; display: flex; align-items: flex-end; background: rgba(5,4,15,.62); }
.shop-sheet.hidden { display: none; }
.shop-sheet-inner {
  width: 100%; box-sizing: border-box; background: var(--ink-850);
  border-top-left-radius: var(--r-xl); border-top-right-radius: var(--r-xl);
  border-top: 2px solid var(--ink-600); box-shadow: var(--shadow-pop);
  padding: 16px 16px calc(20px + env(safe-area-inset-bottom, 0px)); animation: sheetUp .22s var(--ease-out);
}
@keyframes sheetUp { from { transform: translateY(100%); } to { transform: translateY(0); } }
.shop-sheet-head { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.shop-sheet-head .h3 { flex: 1; font-family: var(--font-display); font-weight: 800; font-size: 21px; }
.shop-sheet-head .bal { color: var(--brain); font-family: var(--font-num); font-weight: 800; font-size: 16px; }
.shop-close { background: var(--ink-700); border: none; color: var(--fg-1); width: 34px; height: 34px; border-radius: 999px; font-size: 15px; font-weight: 800; cursor: pointer; flex: none; }
.shop-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.shop-item {
  display: flex; flex-direction: column; gap: 4px; text-align: left; cursor: pointer;
  padding: 12px 13px; border-radius: var(--r-md); border: 2px solid var(--ink-600);
  background: var(--ink-800); color: var(--fg-1); transition: border-color .12s, background .12s, transform 80ms var(--ease-out);
}
.shop-item:active:not(:disabled) { transform: translateY(2px); }
.shop-item .si-top  { display: flex; align-items: center; gap: 6px; font-family: var(--font-display); font-weight: 800; font-size: 14px; }
.shop-item .si-cost { margin-left: auto; font-family: var(--font-num); font-size: 13px; color: var(--brain); }
.shop-item .si-desc { font-size: 11.5px; color: var(--fg-3); font-weight: 600; line-height: 1.25; }
.shop-item.is-armed { border-color: var(--flag); background: rgba(255,173,31,.16); }
.shop-item.is-armed .si-cost { color: var(--flag-bright); }
.shop-item:disabled, .shop-item.is-off { opacity: .42; cursor: default; }
.shop-sheet:not(.is-solo) .shop-solo-only { display: none; }   /* Reroll/Curveball appear only in Solo */
.shop-hint-reveal { margin-top: 12px; text-align: center; font-family: var(--font-num); font-weight: 800; font-size: 20px; letter-spacing: .28em; color: var(--flag-bright); min-height: 24px; }

/* ── Player row (leaderboard) ────────────────────────────── */
.wn-row {
  display: flex; align-items: center; gap: 12px; padding: 11px 14px;
  border-radius: var(--r-md); background: var(--ink-800);
  border: 2px solid var(--ink-700); font-family: var(--font-ui);
}
.wn-row.is-me   { background: var(--ink-700); border-color: var(--brand); }
.wn-row.is-lead { border-color: var(--brain); box-shadow: var(--glow-brain); }
.wn-row-rank { font-family: var(--font-num); font-weight: 800; font-size: 16px; color: var(--fg-3); width: 22px; }
.wn-row.is-lead .wn-row-rank { color: var(--brain); }
.wn-row-name { font-weight: 700; font-size: 16px; flex: 1; color: var(--fg-1); }
.wn-row-pts  { font-family: var(--font-num); font-weight: 800; font-size: 16px; color: var(--fg-1); font-variant-numeric: tabular-nums; }
.wn-row.is-lead .wn-row-pts { color: var(--brain); }

/* ── Wordmark (mark + Word·Nerd) ─────────────────────────── */
.wn-wordmark { display: inline-flex; align-items: center; gap: 10px; }
.wn-wordmark img { width: 34px; height: 34px; display: block; }
.wn-wordmark .wm { font-family: var(--font-display); font-weight: 800; font-size: 24px; color: var(--fg-1); }
.wn-wordmark .wm b { color: var(--brain); font-weight: 800; }

/* ── Arena screen frame (per-screen container) ───────────── */
.wn-screen {
  min-height: 100vh; box-sizing: border-box;
  background:
    radial-gradient(60% 50% at 50% 0%, rgba(124,92,255,.18), transparent 70%),
    var(--ink-900);
  color: var(--fg-1); font-family: var(--font-ui);
  display: flex; flex-direction: column;
}