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.dot{margin-left:6px}.level-stack{border-radius:8px;gap:2px;height:16px;display:flex;overflow:hidden}.level-stack .seg{min-width:4px}.legend-list{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:6px 12px;margin-top:14px;font-size:15px;display:grid}.legend-list b{font-variant-numeric:tabular-nums;margin-left:auto}.legend-list li{align-items:center;gap:8px;display:flex}.swatch{border-radius:3px;flex:none;width:10px;height:10px}.locked{justify-items:start;gap:8px;display:grid}.locked svg{color:var(--seal)}.retention li{grid-template-columns:70px 1fr 48px;align-items:center;gap:12px;min-height:36px;display:grid}.retention b{text-align:right;font-variant-numeric:tabular-nums}.columns{grid-template-columns:repeat(7,1fr);align-items:end;gap:8px;height:140px;display:grid}.column{grid-template-rows:1fr auto auto;justify-items:center;gap:3px;height:100%;display:grid}.column-bar{background:var(--lv-3);border-radius:4px 4px 2px 2px;align-self:end;width:70%;min-height:3px}.heatmap{grid-template-rows:repeat(7,1fr);grid-auto-flow:column;gap:3px;display:grid}.heatmap i{aspect-ratio:1;background:var(--surface-3);border-radius:3px}.heatmap i.on{background:var(--seal)}.session{max-width:640px;min-height:100dvh;padding:calc(var(--safe-t) + 6px) 16px calc(var(--safe-b) + 12px);flex-direction:column;margin:0 auto;display:flex}.session-header{grid-template-columns:44px 1fr 44px;align-items:center;gap:10px;min-height:52px;display:grid}.session-header .meter{height:5px}.skill-tag{color:var(--ink-3);align-self:center;margin-top:4px;font-size:13px;font-weight:650}.session-card{flex-direction:column;flex:1;display:flex}.card-body{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:14px;padding:16px 4px;display:flex}.card-body.write,.card-body.intro{justify-content:flex-start}.actions{gap:10px;padding-top:12px;display:grid}.actions.two{grid-template-columns:1fr 1fr}.tag{color:var(--seal-strong);background:var(--seal-soft);border-radius:99px;padding:4px 10px;font-size:13px;font-weight:650}.answer{animation:rise .22s var(--ease);justify-items:center;gap:8px;display:grid}@keyframes rise{0%{opacity:0;transform:translateY(6px)}}.answer-line{align-items:center;gap:4px;display:flex}.answer-pinyin{font-size:24px;font-weight:500}.answer-meaning{color:var(--ink-2);max-width:30ch;font-size:20px}.answer-meaning.small{font-size:17px}.sandhi{color:var(--ink-3);font-size:14px}.example{border-radius:var(--radius-m);background:var(--surface);gap:4px;max-width:100%;margin-top:6px;padding:12px 16px;display:grid}.breakdown{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.breakdown li{border-radius:var(--radius-m);background:var(--surface);min-width:76px;color:var(--ink-3);justify-items:center;gap:2px;padding:10px 12px;font-size:14px;display:grid}.hint{color:var(--ink-3);align-items:center;gap:6px;font-size:15px;display:inline-flex}.prompt{color:var(--ink-2);font-size:20px;font-weight:600}.prompt-meaning{letter-spacing:-.01em;max-width:20ch;font-size:30px;font-weight:650;line-height:1.2}.prompt-meaning.compact{font-size:22px}.context{flex-wrap:wrap;justify-content:center;align-items:baseline;gap:8px;display:flex}.verdict{font-size:15px;font-weight:650}.verdict.good{color:var(--good)}.verdict.bad{color:var(--bad)}.audio-orb{background:var(--surface);width:132px;height:132px;color:var(--brand-ink);box-shadow:var(--shadow-1), 0 0 0 10px color-mix(in srgb, var(--surface) 50%, transparent);cursor:pointer;transition:transform .15s var(--ease);border:0;border-radius:50%;place-items:center;display:grid}.audio-orb:active{transform:scale(.96)}.audio-orb.playing{color:var(--seal);animation:1.2s ease-in-out infinite breathe}@keyframes breathe{50%{box-shadow:var(--shadow-1), 0 0 0 16px color-mix(in srgb, var(--seal) 12%, transparent)}}.write-result{justify-items:center;gap:10px;padding:18px 0;display:grid}.write-result .verdict{font-size:17px}.write-result.g-3 .verdict{color:var(--good)}.write-result.g-2 .verdict{color:var(--warn)}.write-result.g-1 .verdict{color:var(--bad)}.written{gap:8px;display:flex}.written-char{border-radius:14px;padding:4px 8px;font-size:84px;line-height:1.1}.written-char.fail{color:var(--bad);background:var(--bad-soft)}.written-char.hard{color:var(--warn);background:var(--warn-soft)}.written-char.good{color:var(--ink)}.writer{justify-items:center;gap:12px;width:100%;display:grid}.writer-slots{gap:8px;display:flex}.slot{border:1.5px dashed var(--ink-4);width:46px;height:46px;color:var(--good);border-radius:10px;place-items:center;font-size:28px;display:grid}.slot.current{border-style:solid;border-color:var(--brand-ink)}.slot.done{border-style:solid;border-color:var(--good);background:var(--good-soft)}.board{aspect-ratio:1;background:var(--surface);width:min(100%,340px);box-shadow:var(--shadow-1);touch-action:none;-webkit-user-select:none;user-select:none;border-radius:18px;transition:box-shadow .2s;position:relative}.flash-ok .board{box-shadow:var(--shadow-1), 0 0 0 3px color-mix(in srgb, var(--good) 45%, transparent)}.flash-bad .board{box-shadow:var(--shadow-1), 0 0 0 3px color-mix(in srgb, var(--bad) 45%, transparent);animation:.25s nudge}@keyframes nudge{30%{transform:translate(-4px)}70%{transform:translate(4px)}}.board-grid{pointer-events:none;width:100%;height:100%;position:absolute;inset:0}.board-grid path{stroke:var(--outline);stroke-width:.4px;stroke-dasharray:1.6 1.6;fill:none}.board-grid .diag{stroke-width:.3px}.board-host{z-index:1;touch-action:none;width:100%;height:100%;position:relative}.board-host svg{touch-action:none;display:block}.board-overlay{z-index:2;color:var(--ink-3);background:color-mix(in srgb, var(--surface) 85%, transparent);border-radius:inherit;place-items:center;font-size:15px;display:grid;position:absolute;inset:0}.writer-tools{flex-wrap:wrap;justify-content:center;gap:8px;display:flex}.help-dots{letter-spacing:2px;color:var(--seal);font-size:9px}.tones{justify-items:center;gap:14px;display:grid}.tone-slots{gap:10px;display:flex}.tone-slot{border:2px solid var(--line);border-radius:var(--radius-m);background:var(--surface);cursor:pointer;justify-items:center;gap:2px;min-width:58px;padding:8px 10px;display:grid}.tone-slot.active{border-color:var(--brand-ink)}.tone-slot.ok{border-color:var(--good);background:var(--good-soft)}.tone-slot.bad{border-color:var(--bad);background:var(--bad-soft)}.tone-slot-char{color:var(--ink-3);font-size:18px}.tone-slot-mark{min-height:30px;font-size:24px;font-weight:600}.tone-keys{grid-template-columns:repeat(5,1fr);gap:8px;width:min(100%,360px);display:grid}.tone-key{border-radius:var(--radius-m);background:var(--surface);min-height:58px;box-shadow:var(--shadow-1);cursor:pointer;border:0;justify-items:center;gap:0;transition:transform .1s;display:grid}.tone-key:active{transform:scale(.95)}.tone-key-glyph{font-size:26px;font-weight:500;line-height:1.2}.tone-key-label{color:var(--ink-3);font-size:11px}.summary-body{text-align:center;flex:1;align-content:center;justify-items:center;gap:10px;padding:24px 0;display:grid}.summary-body h1{letter-spacing:-.02em;margin-top:8px;font-size:30px;font-weight:700}.summary-section{width:100%;margin-top:18px}.summary-section h2{color:var(--ink-3);margin-bottom:10px;font-size:13px;font-weight:650}.summary-list{flex-wrap:wrap;justify-content:center;gap:8px;display:flex}.summary-list li{border-radius:var(--radius-m);background:var(--surface);justify-items:center;gap:2px;padding:10px 14px;font-size:13px;display:grid}.onboarding{min-height:100dvh;padding-bottom:calc(var(--safe-b) + 20px);flex-direction:column;display:flex}.dots-nav{justify-content:center;gap:6px;padding:8px 0 20px;display:flex}.dots-nav i{background:var(--surface-3);border-radius:50%;width:7px;height:7px}.dots-nav i.on{background:var(--seal);border-radius:4px;width:20px}.onb-step{flex-direction:column;flex:1;gap:16px;display:flex}.onb-step h1{letter-spacing:-.02em;font-size:32px;font-weight:700;line-height:1.12}.onb-step .brand-seal{margin:24px 0 8px}.lead{color:var(--ink-2);font-size:18px;line-height:1.5}.onb-actions{gap:8px;margin-top:auto;padding-top:20px;display:grid}@media (min-width:700px){.hz-hero{font-size:120px}.card-body{padding:24px}}