/* TRADE-OFFS! — technical-manual-meets-arcade.
   Off-white paper, near-black ink, one hot accent (orange) + a cool teal for
   the OLTP/OLAP split. Thick borders, hard offset shadows, no gradients. */

:root {
  --paper: #f4f1ea;
  --paper-2: #fbfaf6;
  --ink: #141210;
  --ink-soft: #4a453e;
  --accent: #e8590c; /* hot orange */
  --accent-ink: #fff3ec;
  --teal: #1c6e8c; /* cool secondary — OLAP */
  --teal-ink: #eaf6fb;
  --amber: #f2a900;
  --red: #c0392b;
  --green: #2f7d3b;
  --line: 3px;
  --radius: 10px;
  --shadow: 6px 6px 0 var(--ink);
  --shadow-sm: 4px 4px 0 var(--ink);
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.4;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
h1, h2, h3 { line-height: 1.1; margin: 0 0 .4em; }
a { color: var(--teal); }

/* subtle paper grid texture, no images */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(rgba(20,18,16,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20,18,16,.035) 1px, transparent 1px);
  background-size: 26px 26px;
}

.wrap { max-width: 1200px; margin: 0 auto; padding: clamp(12px, 3vw, 28px); }
.stack { display: flex; flex-direction: column; gap: 16px; }
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.grow { flex: 1 1 auto; }
.center { text-align: center; }
.muted { color: var(--ink-soft); }
.hidden { display: none !important; }
.small { font-size: .85rem; }

/* ---- cards ---- */
.card {
  background: var(--paper-2);
  border: var(--line) solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(14px, 3vw, 24px);
}
.card--tight { padding: 12px 14px; box-shadow: var(--shadow-sm); }
.tag {
  display: inline-block; font-family: var(--mono); font-weight: 700;
  font-size: .72rem; letter-spacing: .08em; text-transform: uppercase;
  padding: 3px 8px; border: 2px solid var(--ink); border-radius: 6px;
  background: var(--ink); color: var(--paper);
}
.tag--teal { background: var(--teal); border-color: var(--teal); }
.tag--accent { background: var(--accent); border-color: var(--accent); }
.tag--ghost { background: transparent; color: var(--ink); }

/* ---- buttons ---- */
.btn {
  font: inherit; font-weight: 700;
  border: var(--line) solid var(--ink);
  background: var(--paper-2); color: var(--ink);
  border-radius: var(--radius);
  padding: 14px 18px; cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform .06s ease, box-shadow .06s ease;
  min-height: 52px;
}
.btn:hover { transform: translate(-1px, -1px); box-shadow: 5px 5px 0 var(--ink); }
.btn:active { transform: translate(3px, 3px); box-shadow: 1px 1px 0 var(--ink); }
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none; box-shadow: var(--shadow-sm); }
.btn--accent { background: var(--accent); color: var(--accent-ink); }
.btn--teal { background: var(--teal); color: var(--teal-ink); }
.btn--ink { background: var(--ink); color: var(--paper); }
.btn--lg { font-size: 1.15rem; padding: 18px 22px; min-height: 64px; }
.btn--block { width: 100%; }
.btn--selected { outline: 4px solid var(--amber); outline-offset: 2px; }

input, select, textarea {
  font: inherit; font-family: var(--mono);
  border: var(--line) solid var(--ink); border-radius: var(--radius);
  padding: 14px; background: var(--paper-2); color: var(--ink);
  width: 100%; min-height: 52px;
}
label { font-weight: 700; display: block; margin-bottom: 6px; }

/* ---- code / room code display ---- */
.roomcode {
  font-family: var(--mono); font-weight: 800; letter-spacing: .12em;
  font-size: clamp(2.4rem, 12vw, 6rem); line-height: 1;
  background: var(--ink); color: var(--paper);
  padding: .1em .25em; border-radius: 14px; display: inline-block;
}

/* ---- timers ---- */
.bar { height: 18px; border: var(--line) solid var(--ink); border-radius: 999px; overflow: hidden; background: var(--paper-2); }
.bar > span { display: block; height: 100%; background: var(--green); width: 100%; transition: width .2s linear, background .2s linear; }
.bar.warn > span { background: var(--amber); }
.bar.danger > span { background: var(--red); }

.ring { display: block; }
.ring circle.track { stroke: rgba(20,18,16,.12); }
.ring circle.progress { stroke: var(--green); transition: stroke-dashoffset .2s linear, stroke .2s linear; stroke-linecap: round; }
.ring.warn circle.progress { stroke: var(--amber); }
.ring.danger circle.progress { stroke: var(--red); }
.ring text { font-family: var(--mono); font-weight: 800; fill: var(--ink); }

/* ---- host: prompt + options ---- */
.prompt { font-size: clamp(1.5rem, 4.2vw, 2.6rem); font-weight: 800; }
.host .prompt { font-size: clamp(1.8rem, 3.6vw, 2.8rem); min-height: 40px; }
.options { display: grid; gap: 14px; grid-template-columns: 1fr; }
@media (min-width: 720px) { .options.cols-2 { grid-template-columns: 1fr 1fr; } }
.option {
  border: var(--line) solid var(--ink); border-radius: var(--radius);
  background: var(--paper-2); padding: 16px 18px; font-size: 1.1rem; font-weight: 600;
  display: flex; gap: 12px; align-items: center; box-shadow: var(--shadow-sm);
}
.host .option { font-size: clamp(1.1rem, 2vw, 1.6rem); min-height: 28px; }
.option .idx { font-family: var(--mono); font-weight: 800; background: var(--ink); color: var(--paper); border-radius: 6px; padding: 2px 9px; }
.option.correct { background: #e6f4e9; border-color: var(--green); }
.option.correct .idx { background: var(--green); }
.option.wrong { background: #f7e7e5; border-color: var(--red); }
.option.removed { opacity: .3; text-decoration: line-through; }

/* ---- player answer controls ---- */
.tap-grid { display: grid; grid-template-columns: 1fr; gap: 12px; }
.tap-grid.cols-2 { grid-template-columns: 1fr 1fr; }
.bucket-btns { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.bucket-btns .btn { min-height: 96px; font-size: 1.3rem; }

/* ---- match: drag-and-drop bucket board ---- */
.match-board { display: flex; flex-direction: column; gap: 14px; }
.match-hint { margin: 0; }
.match-count { align-self: flex-end; color: var(--ink-soft); }
.match-tray {
  display: flex; flex-wrap: wrap; gap: 10px; min-height: 62px; padding: 10px;
  border: 3px dashed var(--ink); border-radius: var(--radius);
  background: repeating-linear-gradient(45deg, transparent 0 8px, rgba(20,18,16,.03) 8px 16px);
}
.match-tray.drag-over, .match-bucket.drag-over { outline: 4px solid var(--amber); outline-offset: 2px; }
.match-chip {
  font: inherit; font-weight: 700; cursor: grab; touch-action: none; user-select: none;
  border: 3px solid var(--ink); border-radius: 999px;
  background: var(--paper-2); color: var(--ink);
  padding: 10px 16px; min-height: 44px; box-shadow: var(--shadow-sm);
}
.match-chip:active { cursor: grabbing; }
.match-chip.selected { outline: 4px solid var(--amber); outline-offset: 2px; background: var(--accent); color: var(--accent-ink); }
.match-chip.dragging-src { opacity: .35; pointer-events: none; }
.match-chip-clone { position: fixed; z-index: 100; transform: translate(-50%, -50%); pointer-events: none; box-shadow: var(--shadow); }
.match-buckets { display: grid; grid-template-columns: 1fr; gap: 12px; }
@media (min-width: 560px) { .match-buckets { grid-template-columns: 1fr 1fr; } }
.match-bucket {
  border: 3px solid var(--ink); border-radius: var(--radius);
  background: var(--paper-2); box-shadow: var(--shadow-sm); padding: 10px 12px; cursor: pointer;
}
.match-bucket:focus-visible { outline: 4px solid var(--teal); outline-offset: 2px; }
.match-bucket-label { font-weight: 800; margin-bottom: 8px; }
.match-dropzone { display: flex; flex-wrap: wrap; gap: 8px; min-height: 46px; border-top: 2px dashed rgba(20,18,16,.2); padding-top: 8px; }
.match-board.has-selection .match-bucket { border-style: dashed; }
.match-board.has-selection .match-bucket:hover { background: var(--teal-ink); }

/* ---- streak / lag meter ---- */
.lag { display: flex; align-items: center; gap: 8px; font-family: var(--mono); font-weight: 700; }
.lag .pips { display: flex; gap: 3px; }
.lag .pip { width: 12px; height: 18px; border: 2px solid var(--ink); border-radius: 3px; background: var(--paper-2); }
.lag .pip.on { background: var(--accent); }
.lag .mult { color: var(--accent); }

/* ---- distribution bars (reveal) ---- */
.dist { display: flex; flex-direction: column; gap: 8px; }
.dist .drow { display: grid; grid-template-columns: 1fr; gap: 4px; }
.dist .dlabel { font-weight: 600; display: flex; justify-content: space-between; gap: 8px; }
.dist .dtrack { height: 22px; border: 2px solid var(--ink); border-radius: 6px; overflow: hidden; background: var(--paper-2); }
.dist .dfill { height: 100%; background: var(--teal); }
.dist .drow.correct .dfill { background: var(--green); }

/* ---- scoreboard ---- */
.board { display: flex; flex-direction: column; gap: 10px; }
.brow {
  display: grid; grid-template-columns: 46px 1fr auto auto; gap: 12px; align-items: center;
  border: var(--line) solid var(--ink); border-radius: var(--radius); padding: 10px 14px;
  background: var(--paper-2); box-shadow: var(--shadow-sm);
}
.brow .rank { font-family: var(--mono); font-weight: 800; font-size: 1.3rem; }
.brow .score { font-family: var(--mono); font-weight: 800; font-size: 1.3rem; }
.brow .delta { font-family: var(--mono); font-weight: 700; font-size: .85rem; }
.delta.up { color: var(--green); } .delta.down { color: var(--red); } .delta.flat { color: var(--ink-soft); }
.brow.me { outline: 4px solid var(--amber); }
.avatar { width: 40px; height: 40px; flex: 0 0 auto; }
.avatar svg { width: 100%; height: 100%; display: block; }

/* ---- lobby players ---- */
.players { display: flex; flex-wrap: wrap; gap: 12px; }
.pchip { display: flex; align-items: center; gap: 8px; border: var(--line) solid var(--ink); border-radius: 999px; padding: 6px 14px 6px 6px; background: var(--paper-2); box-shadow: var(--shadow-sm); font-weight: 700; }
.pchip .avatar { width: 30px; height: 30px; }
.pchip.pop { animation: pop .3s ease; }
@keyframes pop { from { transform: scale(.6); opacity: 0; } to { transform: scale(1); opacity: 1; } }

/* ---- avatar picker ---- */
.avpick { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; }
.avpick button { border: var(--line) solid var(--ink); border-radius: var(--radius); background: var(--paper-2); padding: 6px; cursor: pointer; aspect-ratio: 1; }
.avpick button.sel { outline: 4px solid var(--amber); }
.avpick .avatar { width: 100%; height: 100%; }

/* ---- powerup card ---- */
.powerups { display: grid; gap: 10px; grid-template-columns: 1fr; }
@media (min-width: 560px){ .powerups { grid-template-columns: 1fr 1fr; } }
.pu { border: var(--line) solid var(--ink); border-radius: var(--radius); padding: 10px 12px; background: var(--paper-2); box-shadow: var(--shadow-sm); cursor: pointer; }
.pu.sel { outline: 4px solid var(--amber); }
.pu .name { font-weight: 800; }
.pu .gloss { font-size: .85rem; color: var(--ink-soft); }

/* ---- result banners ---- */
.banner { border: var(--line) solid var(--ink); border-radius: var(--radius); padding: 16px; font-weight: 800; font-size: 1.3rem; display: flex; gap: 10px; align-items: center; box-shadow: var(--shadow-sm); }
.banner.good { background: #e6f4e9; border-color: var(--green); }
.banner.bad { background: #f7e7e5; border-color: var(--red); }
.banner.neutral { background: var(--teal-ink); border-color: var(--teal); }

/* ---- explanation (the point of the whole thing) ---- */
.explain { background: var(--paper-2); border: var(--line) solid var(--ink); border-left: 12px solid var(--teal); border-radius: var(--radius); padding: clamp(16px, 3vw, 26px); box-shadow: var(--shadow); }
.explain .etext { font-size: clamp(1.05rem, 2.2vw, 1.5rem); }
.explain .page { font-family: var(--mono); font-weight: 800; color: var(--accent); }

/* ---- nerd panel ---- */
.nerd { position: fixed; top: 0; right: 0; width: min(360px, 90vw); height: 100vh; overflow-y: auto; background: var(--ink); color: var(--paper); padding: 18px; font-family: var(--mono); font-size: .82rem; z-index: 50; box-shadow: -6px 0 0 rgba(0,0,0,.2); }
.nerd h3 { color: var(--amber); }
.nerd .k { color: var(--accent); }

/* ---- spinner (cold start) ---- */
.spinner { width: 54px; height: 54px; border: 6px solid rgba(20,18,16,.15); border-top-color: var(--accent); border-radius: 50%; animation: spin 1s linear infinite; margin: 8px auto; }
@keyframes spin { to { transform: rotate(360deg); } }
.shake { animation: shake .4s ease; }
@keyframes shake { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-6px)} 75%{transform:translateX(6px)} }

/* ---- confetti ---- */
.confetti { position: fixed; inset: 0; pointer-events: none; z-index: 40; overflow: hidden; }
.confetti i { position: absolute; top: -20px; width: 10px; height: 14px; animation: fall linear forwards; }
@keyframes fall { to { transform: translateY(110vh) rotate(720deg); } }

/* ---- podium ---- */
.podium { display: flex; justify-content: center; align-items: flex-end; gap: 12px; }
.podium .step { border: var(--line) solid var(--ink); border-radius: var(--radius) var(--radius) 0 0; background: var(--paper-2); padding: 12px; text-align: center; box-shadow: var(--shadow-sm); }
.podium .p1 { height: 200px; background: var(--amber); }
.podium .p2 { height: 160px; }
.podium .p3 { height: 130px; }
.awards { display: flex; flex-wrap: wrap; gap: 10px; }
.award { border: var(--line) solid var(--ink); border-radius: var(--radius); padding: 8px 12px; background: var(--paper-2); box-shadow: var(--shadow-sm); }
.award .title { font-weight: 800; color: var(--accent); }

/* ---- misc host layout ---- */
.host-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.qmeta { font-family: var(--mono); font-weight: 700; color: var(--ink-soft); }
.kbd { font-family: var(--mono); border: 2px solid var(--ink); border-radius: 6px; padding: 1px 6px; font-size: .8rem; background: var(--paper-2); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .confetti { display: none !important; }
}