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currentColor;opacity:.95}.sb-stamp.is-small{width:34px;height:34px;font-size:.58rem;border-width:1.5px}.sb-stamp.is-small>span{border-width:0}.sb-stamp.is-large{width:78px;height:78px;font-size:.95rem;padding:3px;box-shadow:inset 0 0 0 1px #0000}.sb-stamp.is-empty{--sb-ink-stamp: color-mix(in srgb, var(--sb-ink-soft) 55%, transparent);border-style:dashed;transform:none;font-weight:500}.sb-stamp.is-read{--sb-ink-stamp: var(--sb-sky)}.sb-stamp.is-recorded{--sb-ink-stamp: var(--sb-ink-soft)}.sb-stamp.is-understanding{--sb-ink-stamp: var(--sb-sky)}.sb-stamp.is-memorizing{--sb-ink-stamp: var(--sb-gold)}.sb-stamp.is-acquired{--sb-ink-stamp: var(--sb-seal);border-radius:22%;background:color-mix(in srgb,var(--sb-seal) 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.primary{background:var(--sb-tone);color:#fffdf6}.sb-actions .primary:not(:disabled):hover{background:color-mix(in srgb,var(--sb-tone) 82%,#000);color:#fff}.sb-practice{padding:14px;border-radius:12px;background:var(--card);border:1px solid var(--sb-rule)}.sb-empty{display:flex;flex-direction:column;align-items:center;text-align:center;gap:6px;padding:30px 12px;color:var(--sb-ink-soft)}.sb-empty.is-right{margin:auto 0}.sb-empty h4{margin:8px 0 0;font-family:var(--sb-serif);font-size:1.15rem;color:var(--sb-ink)}.sb-empty p{margin:0;font-size:.84rem;max-width:30ch}.sb-empty .primary{margin-top:8px}.sb-empty-art{width:86px;height:66px;border-radius:4px 10px 10px 4px;position:relative;background:linear-gradient(90deg,color-mix(in srgb,var(--sb-tone) 40%,var(--sb-paper)) 0 12%,var(--sb-paper-shade) 12%);box-shadow:0 0 0 1.5px color-mix(in srgb,var(--sb-tone) 45%,transparent),4px 4px 0 var(--sb-edge)}.sb-empty-art:after{content:"";position:absolute;left:24%;right:14%;top:30%;height:40%;background:repeating-linear-gradient(var(--sb-rule) 0 2px,transparent 2px 9px)}.sb-note{padding:12px;border-radius:10px;background:color-mix(in srgb,var(--bad) 8%,transparent)}.sb-footnote{margin:22px 8px 0;font-size:.74rem;color:var(--muted);text-align:center}.sb-notices{margin:8px;font-size:.74rem;color:var(--muted)}.sb-notices pre{white-space:pre-wrap;font-size:.9em}@media(max-width:900px){.sb-cover{grid-template-columns:1fr;padding:26px 22px 28px;gap:22px}.sb-ribbons{padding:0 14px}.sb-ribbon{min-width:66px}.sb-spread{grid-template-columns:1fr;margin:-14px 0 0}.sb-spine{display:none}.sb-page{padding:34px 20px 22px}.sb-page-left{border-radius:4px 4px 0 0;background:var(--sb-paper)}.sb-page-right{border-radius:0 0 12px 12px;background:var(--sb-paper);border-top:1px dashed var(--sb-rule);scroll-margin-top:16px}.sb-toc-title{max-width:62%}}@media(max-width:480px){.sb-gauge-ring{width:60px;height:60px}.sb-stamp.is-large{width:64px;height:64px;font-size:.82rem}.sb-entry-head{gap:10px}}:root{--bg: #fafaf7;--fg: #1f2328;--muted: #6b7280;--line: #e5e7eb;--card: #ffffff;--accent: #2563eb;--ok: #16a34a;--bad: #dc2626;--warn: #d97706;--understanding: #93c5fd;--memorizing: #fbbf24;--acquired: #4ade80;font-family:system-ui,-apple-system,Segoe UI,Roboto,Noto Sans KR,sans-serif;line-height:1.5;color:var(--fg);background:var(--bg)}.guidance-panel{margin:0 0 26px;padding:20px;background:var(--card);border:1px solid var(--line);border-radius:16px}.guidance-presets{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.guidance-presets button{display:flex;flex-direction:column;gap:8px;text-align:left;padding:20px;min-height:108px;border:2px solid var(--line);border-radius:12px;background:var(--bg);color:var(--fg);white-space:normal}.guidance-presets button 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0}.practice-topline{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;color:var(--muted);font-size:.85rem}.practice-question{font-size:1.45rem;font-weight:600;line-height:1.6;margin:26px 0;white-space:pre-wrap;overflow-wrap:anywhere}.practice-choices{display:grid;gap:10px;margin-bottom:20px}.practice-choices button{padding:15px;text-align:left;white-space:normal}.practice-choices button[aria-pressed=true]{background:#eff6ff;color:#193b70;border-color:var(--accent)}.practice-feedback{margin:22px 0;padding:18px;border-left:4px solid #d97706;background:#fffbeb;color:#713f12;border-radius:6px}.practice-feedback.correct{border-color:#16a34a;background:#f0fdf4;color:#14532d}.practice-feedback p{margin:8px 0 0}.practice-answer{padding:20px;background:#eef4fb;color:#193b70;border-radius:10px;margin:20px 0}.practice-answer p{font-size:1.3rem;margin:8px 0 0;white-space:pre-wrap;overflow-wrap:anywhere}.practice-hint{color:var(--accent)}.practice-history{padding:14px 0;border-bottom:1px solid var(--line)}.practice-history p{white-space:pre-wrap;overflow-wrap:anywhere}.practice-history time,.practice-history span{font-size:.82rem;color:var(--muted)}.practice-card details{margin-top:22px}.practice-card details button{margin:14px 8px 0 0}@media(max-width:680px){.guidance-panel{padding:12px}.guidance-presets{gap:7px}.guidance-presets button{padding:12px 9px;min-height:112px}.guidance-presets button strong{font-size:1rem}.guidance-presets button span{font-size:.78rem}.word-list,.word-editor-grid{grid-template-columns:1fr}.practice-card,.word-sentence{padding:18px}.practice-question{font-size:1.25rem}.word-tabs button{flex:1}}.inbox-view{max-width:960px;margin:0 auto}.inbox-view form{display:grid;gap:10px;margin:20px 0}.inbox-view textarea{width:100%;box-sizing:border-box;font:inherit;color:var(--fg);background:var(--card);border:1px solid var(--line);border-radius:8px;padding:12px}.inbox-entry{padding:16px;margin:12px 0;border:1px solid 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