/* Mandarin Quest — playful storybook: warm paper, ink, lantern red & gold. */
:root {
  --paper: #fdf6e3;
  --paper-2: #f7ead1;
  --ink: #3b2f2f;
  --red: #c0392b;
  --red-dark: #a93226;
  --gold: #d4ac0d;
  --gold-soft: #f9e79f;
  --jade: #1e8449;
  --sky: #2471a3;
  --card: #fffdf5;
  --shadow: 0 3px 0 rgba(59, 47, 47, 0.18);
  --radius: 16px;
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background:
    radial-gradient(circle at 12% 8%, rgba(212, 172, 13, 0.13), transparent 42%),
    radial-gradient(circle at 88% 92%, rgba(192, 57, 43, 0.10), transparent 45%),
    var(--paper);
  color: var(--ink);
  min-height: 100vh;
}
button { font: inherit; cursor: pointer; }
.hidden { display: none !important; }

#topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 16px; background: linear-gradient(180deg, #b03a2e, var(--red-dark));
  color: #fff8e7; position: sticky; top: 0; z-index: 30;
  box-shadow: 0 2px 8px rgba(0,0,0,.25);
}
.brand { font-weight: 800; font-size: 1.15rem; letter-spacing: .3px; }
.stats { display: flex; gap: 14px; align-items: center; font-weight: 700; }
.ring-bg { fill: none; stroke: rgba(255,255,255,.35); stroke-width: 4; }
.ring-fg { fill: none; stroke: var(--gold-soft); stroke-width: 4; stroke-linecap: round;
  stroke-dasharray: 75.4; stroke-dashoffset: 75.4; transform: rotate(-90deg); transform-origin: center; }

#tabs { display: flex; gap: 6px; padding: 8px 12px 0; max-width: 760px; margin: 0 auto; }
.tab {
  flex: 1; border: 2px solid rgba(59,47,47,.16); background: var(--paper-2);
  border-bottom: none; border-radius: 12px 12px 0 0; padding: 8px 4px; font-weight: 700;
  color: var(--ink); opacity: .75;
}
.tab.active { background: var(--card); opacity: 1; border-color: rgba(59,47,47,.28); }
main { max-width: 760px; margin: 0 auto; padding: 0 12px 64px; }
.view { background: var(--card); border: 2px solid rgba(59,47,47,.16); border-radius: 0 0 var(--radius) var(--radius);
  padding: 18px 16px 28px; min-height: 55vh; box-shadow: var(--shadow); }

/* ---------- map ---------- */
.world-banner { margin: 22px 0 6px; padding: 12px 16px; border-radius: var(--radius); color: #fff8e7;
  box-shadow: var(--shadow); position: relative; overflow: hidden; }
.world-banner h2 { margin: 0; font-size: 1.3rem; }
.world-banner p { margin: 3px 0 0; opacity: .92; font-size: .92rem; }
.world-banner .wsub { font-size: .8rem; text-transform: uppercase; letter-spacing: 1.5px; opacity: .85; }
.world-banner.locked { filter: grayscale(.55); opacity: .8; }
.path { position: relative; padding: 14px 0 4px; }
.node-row { display: flex; margin: 13px 0; }
.node-row:nth-child(odd) { justify-content: flex-start; padding-left: 12%; }
.node-row:nth-child(even) { justify-content: flex-end; padding-right: 12%; }
.node {
  width: 74px; height: 74px; border-radius: 50%; border: 3px solid var(--ink);
  background: var(--gold-soft); color: var(--ink); font-weight: 800; font-size: 1.05rem;
  box-shadow: var(--shadow); position: relative; display: flex; flex-direction: column;
  align-items: center; justify-content: center; line-height: 1.05;
}
.node small { font-size: .58rem; font-weight: 700; max-width: 64px; text-align: center; }
.node.done { background: var(--jade); color: #fff; border-color: #145a32; }
.node.boss { background: var(--red); color: #fff; border-color: #7b241c; width: 84px; height: 84px; }
.node.locked { background: #d5cdb8; color: #8a8171; border-color: #a89f8a; cursor: not-allowed; }
.node .stars { position: absolute; bottom: -9px; font-size: .72rem; background: var(--card);
  border: 1.5px solid rgba(59,47,47,.3); border-radius: 9px; padding: 0 5px; color: var(--gold); }
.node:not(.locked):active { transform: scale(.95); }

/* ---------- lesson ---------- */
.lesson-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.lesson-head h2 { margin: 0; font-size: 1.15rem; flex: 1; }
.progress-dots { display: flex; gap: 4px; flex-wrap: wrap; }
.progress-dots i { width: 9px; height: 9px; border-radius: 50%; background: #ddd3b8; display: block; }
.progress-dots i.now { background: var(--red); transform: scale(1.25); }
.progress-dots i.ok { background: var(--jade); }
.progress-dots i.bad { background: #e67e22; }
.card {
  background: var(--paper); border: 2px solid rgba(59,47,47,.18); border-radius: var(--radius);
  padding: 20px 16px; text-align: center; box-shadow: var(--shadow); margin-top: 10px;
}
.card h3 { margin: 0 0 4px; font-size: .95rem; color: var(--red-dark); text-transform: uppercase; letter-spacing: 1px; }
.big-hz { font-size: 3.4rem; font-weight: 800; line-height: 1.15; margin: 8px 0 2px; }
.big-py { font-size: 1.5rem; color: var(--red-dark); font-weight: 700; }
.big-en { font-size: 1.02rem; opacity: .85; margin-top: 4px; }
.note { font-size: .86rem; background: #fef9e7; border: 1.5px dashed var(--gold); border-radius: 10px;
  padding: 7px 10px; margin: 10px auto 0; max-width: 480px; text-align: left; }
.syl-chips { display: flex; gap: 7px; justify-content: center; flex-wrap: wrap; margin: 12px 0 2px; }
.syl-chip { border: 2px solid rgba(59,47,47,.25); background: var(--card); border-radius: 12px;
  padding: 5px 10px; font-weight: 700; }
.syl-chip b { font-size: 1.25rem; display: block; }
.syl-chip span { color: var(--red-dark); font-size: .85rem; }
.syl-chip em { font-style: normal; color: var(--gold); font-size: .8rem; }
.btn-row { display: flex; gap: 9px; justify-content: center; flex-wrap: wrap; margin-top: 14px; }
.btn { border: 2.5px solid var(--ink); border-radius: 999px; padding: 10px 20px; font-weight: 800;
  background: var(--gold-soft); color: var(--ink); box-shadow: var(--shadow); }
.btn:active { transform: translateY(2px); box-shadow: none; }
.btn.primary { background: var(--red); color: #fff8e7; border-color: #7b241c; }
.btn.jade { background: var(--jade); color: #fff; border-color: #145a32; }
.btn.ghost { background: var(--card); }
.btn.big { font-size: 1.12rem; padding: 13px 26px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.rec { background: #e74c3c; color: #fff; border-color: #922b21; animation: pulse 1s infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 8px rgba(231,76,60,.25); } }

.options { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 14px; }
.opt { border: 2.5px solid rgba(59,47,47,.3); background: var(--card); border-radius: 14px;
  padding: 14px 6px; font-size: 1.5rem; font-weight: 800; box-shadow: var(--shadow); }
.opt small { display: block; font-size: .95rem; color: var(--red-dark); font-weight: 700; }
.opt.correct { background: #d5f5e3; border-color: var(--jade); }
.opt.wrong { background: #fadbd8; border-color: var(--red); }
.opt:active { transform: scale(.97); }

canvas.curve { width: 100%; max-width: 520px; height: 150px; background: #fffef8;
  border: 2px solid rgba(59,47,47,.2); border-radius: 12px; margin-top: 10px; }
.legend { font-size: .82rem; display: flex; gap: 16px; justify-content: center; margin-top: 5px; }
.legend .tgt { color: #b7950b; font-weight: 700; } .legend .you { color: var(--red); font-weight: 700; }
.tone-chips { display: flex; gap: 6px; justify-content: center; margin-top: 9px; flex-wrap: wrap; }
.tone-chip { border-radius: 999px; padding: 3px 11px; font-weight: 800; font-size: .86rem; border: 2px solid; }
.tone-chip.ok { background: #d5f5e3; border-color: var(--jade); color: #145a32; }
.tone-chip.bad { background: #fadbd8; border-color: var(--red); color: #7b241c; }
.score-big { font-size: 2rem; font-weight: 900; margin: 6px 0 0; }
.feedback { font-size: 1.02rem; margin-top: 6px; min-height: 1.3em; }
.tiles { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-top: 12px; min-height: 54px; }
.tile { border: 2.5px solid rgba(59,47,47,.3); background: var(--card); border-radius: 12px;
  font-size: 1.6rem; font-weight: 800; padding: 7px 13px; box-shadow: var(--shadow); }
.tile.used { opacity: .25; pointer-events: none; }
.built { font-size: 1.7rem; min-height: 2.2rem; font-weight: 800; letter-spacing: 2px; }
.dialogue-line { text-align: left; max-width: 520px; margin: 10px auto; padding: 11px 14px; border-radius: 14px; }
.dialogue-line.guide { background: #eaf2f8; border: 2px solid #aed6f1; }
.dialogue-line.you { background: #fef9e7; border: 2px solid var(--gold-soft); }
.dialogue-line .who { font-size: .75rem; font-weight: 800; text-transform: uppercase; letter-spacing: 1px; opacity: .7; }
.dialogue-line .hz { font-size: 1.5rem; font-weight: 800; }
.dialogue-line .py { color: var(--red-dark); font-weight: 700; }

/* ---------- words / mic / settings ---------- */
.word-row { display: flex; align-items: center; gap: 10px; padding: 9px 6px; border-bottom: 1.5px dashed rgba(59,47,47,.2); }
.word-row .hz { font-size: 1.45rem; font-weight: 800; min-width: 92px; }
.word-row .mid { flex: 1; }
.word-row .py { color: var(--red-dark); font-weight: 700; }
.word-row .en { font-size: .86rem; opacity: .8; }
.pips { display: flex; gap: 3px; }
.pips i { width: 10px; height: 10px; border-radius: 50%; background: #ddd3b8; display: block; }
.pips i.on { background: var(--jade); }
.icon-btn { border: 2px solid rgba(59,47,47,.3); background: var(--gold-soft); border-radius: 50%;
  width: 42px; height: 42px; font-size: 1.05rem; flex: none; }
.world-h { margin: 20px 0 4px; font-size: 1.05rem; }
.setting-row { display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 13px 2px; border-bottom: 1.5px dashed rgba(59,47,47,.2); }
.setting-row .lbl b { display: block; }
.setting-row .lbl span { font-size: .86rem; opacity: .8; }
.seg { display: flex; border: 2px solid rgba(59,47,47,.3); border-radius: 999px; overflow: hidden; }
.seg button { border: none; background: var(--card); padding: 7px 15px; font-weight: 800; }
.seg button.on { background: var(--red); color: #fff8e7; }
input[type="password"], input[type="text"] { font: inherit; padding: 9px 12px; border-radius: 10px;
  border: 2px solid rgba(59,47,47,.3); background: #fff; width: 100%; }
.meter { height: 12px; background: #eee5c8; border-radius: 6px; overflow: hidden; margin-top: 8px; }
.meter i { display: block; height: 100%; width: 0%; background: var(--jade); transition: width .08s; }

#toast { position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%); background: var(--ink);
  color: #fff8e7; padding: 11px 20px; border-radius: 999px; font-weight: 700; z-index: 99;
  box-shadow: 0 4px 14px rgba(0,0,0,.3); max-width: 88vw; text-align: center; }
.celebrate { font-size: 2.6rem; }
.stars-big { font-size: 2.2rem; color: var(--gold); letter-spacing: 4px; }
@media (max-width: 520px) { .big-hz { font-size: 2.6rem; } .options { grid-template-columns: 1fr 1fr; } }

/* ---------- one-time passcode setup sheet ---------- */
.setup-backdrop { position: fixed; inset: 0; background: rgba(59,47,47,.55); display: flex; align-items: center; justify-content: center; z-index: 80; padding: 16px; }
.setup-card { background: var(--card); border: 2px solid rgba(59,47,47,.25); border-radius: var(--radius); box-shadow: var(--shadow); max-width: 420px; width: 100%; padding: 20px; }
.setup-card h3 { margin: 0 0 6px; }
.setup-card label { display: block; font-weight: 700; font-size: .9rem; margin-top: 12px; }
.setup-card input { width: 100%; margin-top: 5px; padding: 10px 12px; font: inherit; border: 2px solid rgba(59,47,47,.25); border-radius: 10px; background: #fff; color: var(--ink); }
.setup-note { color: var(--red-dark); font-size: .88rem; margin: 10px 0 0; }
.setup-row { display: flex; gap: 8px; justify-content: flex-end; margin-top: 16px; }