:root{--brand:#635bff;--brand-dark:#4b45cc;--bg:#f7f8fb;--card:#fff;--ink:#1f2430;--muted:#6b7280;--line:#e6e8ee;--ok:#16a34a;--warn:#d97706;--bad:#dc2626;--radius:14px}*{box-sizing:border-box}#root,body,html{height:100%}html{-webkit-text-size-adjust:100%}body{-webkit-font-smoothing:antialiased;background:#f7f8fb;background:var(--bg);color:#1f2430;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;margin:0;overflow-x:hidden}a{color:#635bff;color:var(--brand);text-decoration:none}button{cursor:pointer;font-family:inherit}.app-shell{background:#f7f8fb;background:var(--bg);display:flex;flex-direction:column;margin:0 auto;max-width:560px;min-height:100%;min-height:100dvh}.topbar{align-items:center;background:#fff;background:var(--card);border-bottom:1px solid #e6e8ee;border-bottom:1px solid var(--line);display:flex;gap:8px;justify-content:space-between;padding:calc(12px + env(safe-area-inset-top)) calc(16px + env(safe-area-inset-right)) 12px calc(16px + env(safe-area-inset-left));position:-webkit-sticky;position:sticky;top:0;z-index:10}.topbar .logo{color:#635bff;color:var(--brand);flex:0 0 auto;font-size:20px;font-weight:800;letter-spacing:-.5px}.page{flex:1 1;padding:18px calc(18px + env(safe-area-inset-right)) calc(80px + env(safe-area-inset-bottom)) calc(18px + env(safe-area-inset-left))}.bottomnav{background:#fff;background:var(--card);border-top:1px solid #e6e8ee;border-top:1px solid var(--line);bottom:0;display:flex;left:0;margin:0 auto;max-width:560px;padding-bottom:env(safe-area-inset-bottom);position:fixed;right:0;z-index:20}.bn-item{align-items:center;color:#6b7280;color:var(--muted);display:flex;flex:1 1;flex-direction:column;font-size:11px;font-weight:600;gap:2px;padding:8px 2px 7px}.bn-item .bn-icon{display:block}.bn-label{white-space:nowrap}.bn-item.active{color:#635bff;color:var(--brand)}.bn-item.active .bn-icon{transform:translateY(-1px)}.muted{color:#6b7280;color:var(--muted)}.small{font-size:13px}.card{background:#fff;background:var(--card);border:1px solid #e6e8ee;border:1px solid var(--line);border-radius:14px;border-radius:var(--radius);margin-bottom:12px;padding:16px}.card.clickable:hover{border-color:#635bff;border-color:var(--brand)}h1{font-size:22px;margin:6px 0 14px}h2{font-size:17px;margin:0 0 8px}.btn{align-items:center;background:#635bff;background:var(--brand);border:none;border-radius:10px;color:#fff;display:inline-flex;font-size:15px;font-weight:600;gap:8px;justify-content:center;padding:12px 18px;width:100%}.btn:hover{background:#4b45cc;background:var(--brand-dark)}.btn:disabled{cursor:default;opacity:.5}.btn.secondary{background:#eef0f6;color:#1f2430;color:var(--ink)}.btn.ghost{background:#0000;border:1px solid #e6e8ee;border:1px solid var(--line);color:#635bff;color:var(--brand)}.btn.small{font-size:13px;padding:8px 14px;width:auto}.btn.danger{color:#dc2626}.btn.ghost.danger{border-color:#f0c9c9}.btn.ghost.danger:hover{background:#fdecec}.icon-btn{background:#0000;border:none;border-radius:8px;cursor:pointer;font-size:16px;line-height:1;opacity:.55;padding:4px 6px}.icon-btn:hover{background:#fdecec;opacity:1}.field{margin-bottom:12px}.field label{color:#6b7280;color:var(--muted);display:block;font-size:13px;margin-bottom:5px}.field input,.field select,.field textarea{background:#fff;border:1px solid #e6e8ee;border:1px solid var(--line);border-radius:10px;color:#1f2430;color:var(--ink);font-size:15px;padding:11px 12px;width:100%}.field textarea{font-family:ui-monospace,monospace;min-height:140px;resize:vertical}.badge{background:#eef0f6;border-radius:999px;color:#6b7280;color:var(--muted);display:inline-block;font-size:11px;font-weight:700;padding:2px 8px}.badge.brand{background:#ece9ff;color:#635bff;color:var(--brand)}.badge.ok{background:#e6f5ec;color:#16a34a;color:var(--ok)}.badge.warn{background:#fbf0e0;color:#d97706;color:var(--warn)}.badge.bad{background:#fce8e8;color:#dc2626;color:var(--bad)}.row{align-items:center;display:flex;gap:10px;justify-content:space-between}.stack>*+*{margin-top:10px}.progressbar{background:#eceef4;border-radius:999px;height:8px;overflow:hidden}.progressbar>span{background:#635bff;background:var(--brand);display:block;height:100%;transition:width .3s}.error{background:#fce8e8;border-radius:10px;color:#dc2626;color:var(--bad)}.error,.notice{font-size:14px;margin-bottom:12px;padding:10px 12px}.notice{color:#1d4ed8}.player{background:linear-gradient(180deg,#fbfbff,#f2f2fb);display:flex;flex-direction:column;min-height:100vh;min-height:100dvh}.player-top{padding:calc(14px + env(safe-area-inset-top)) calc(18px + env(safe-area-inset-right)) 14px calc(18px + env(safe-area-inset-left))}.player-body{align-items:center;display:flex;flex:1 1;flex-direction:column;justify-content:center;padding:24px;text-align:center}.player-foot{padding:18px calc(18px + env(safe-area-inset-right)) calc(18px + env(safe-area-inset-bottom)) calc(18px + env(safe-area-inset-left))}.wordcard .word{font-size:clamp(32px,11vw,44px);font-weight:800;letter-spacing:-1px;overflow-wrap:anywhere}.wordcard .pos{color:#6b7280;color:var(--muted);font-size:15px;margin-top:4px}.wordcard .translation{color:#635bff;color:var(--brand);font-size:22px;font-weight:600;margin-top:12px}.step-label{color:#6b7280;color:var(--muted);font-size:13px;font-weight:700;letter-spacing:1px;margin-bottom:18px;text-transform:uppercase}.dots{display:flex;gap:10px;justify-content:center;margin-top:22px}.dots .dot{background:#dcdfe8;border-radius:50%;height:16px;transition:transform .2s,background .2s;width:16px}.dots .dot.on{background:#635bff;background:var(--brand);transform:scale(1.15)}.spellbox{flex-wrap:wrap;gap:6px;margin:18px 0}.spellbox,.spellbox .slot{display:flex;justify-content:center}.spellbox .slot{align-items:center;border-bottom:3px solid #e6e8ee;border-bottom:3px solid var(--line);font-size:26px;font-weight:700;height:44px;width:34px}.spellbox .slot.filled{animation:pop .18s;border-color:#635bff;border-color:var(--brand)}@keyframes pop{0%{transform:scale(1.4)}to{transform:scale(1)}}.shake{animation:shake .3s}@keyframes shake{0%,to{transform:translateX(0)}25%{transform:translateX(-7px)}75%{transform:translateX(7px)}}.example .sentence{font-size:clamp(18px,5.5vw,22px);line-height:1.5;overflow-wrap:anywhere}.example .sentence mark{background:#fff0a6;border-radius:4px;padding:0 3px}.example .trans{color:#6b7280;color:var(--muted);font-size:15px;margin-top:10px}.audio-btn{align-items:center;background:#635bff;background:var(--brand);border:none;border-radius:50%;color:#fff;display:flex;font-size:28px;height:72px;justify-content:center;margin:8px auto;width:72px}.audio-btn.playing{animation:pulse 1s infinite}@keyframes pulse{0%,to{box-shadow:0 0 0 0 #635bff66}50%{box-shadow:0 0 0 12px #635bff00}}.mode-toggle{background:#eceef4;border-radius:999px;display:inline-flex;padding:3px}.mode-toggle button{background:#0000;border:none;border-radius:999px;color:#6b7280;color:var(--muted);font-size:13px;font-weight:600;padding:6px 14px;white-space:nowrap}.mode-toggle button.active{background:#fff;box-shadow:0 1px 3px #00000014;color:#635bff;color:var(--brand)}.player-top .row{flex-wrap:wrap;row-gap:8px}@media (max-width:480px){.mode-toggle button{font-size:12px;padding:6px 9px}}.start-overlay{align-items:center;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#141622b8;cursor:pointer;display:flex;inset:0;justify-content:center;padding:calc(20px + env(safe-area-inset-top)) 20px calc(20px + env(safe-area-inset-bottom));position:fixed;z-index:50}.start-cta{color:#fff;text-align:center}.start-cta h2{color:#fff;margin:6px 0}.start-cta .muted{color:#c9cbdd}.start-icon{align-items:center;background:#635bff;background:var(--brand);border-radius:50%;box-shadow:0 8px 30px #635bff80;color:#fff;display:flex;font-size:36px;height:84px;justify-content:center;margin:0 auto 14px;width:84px}.countdown-ring{height:66px;margin:18px auto 0;position:relative;width:66px}.countdown-ring svg{transform:rotate(-90deg)}.cr-track{fill:none;stroke:#e0e2ec;stroke-width:5}.cr-fill{fill:none;stroke:#635bff;stroke:var(--brand);stroke-width:5;stroke-linecap:round;animation:cr-empty linear forwards}@keyframes cr-empty{0%{stroke-dashoffset:0}to{stroke-dashoffset:163.36}}.cr-label{font-size:24px;inset:0;justify-content:center;position:absolute}.cr-label,.summary-word{align-items:center;display:flex}.summary-word{border-bottom:1px solid #e6e8ee;border-bottom:1px solid var(--line);gap:10px;justify-content:space-between;padding:10px 0}.summary-word>span{min-width:0;overflow-wrap:anywhere}.grade{font-weight:800}.grade.g4,.grade.g5{color:#16a34a;color:var(--ok)}.grade.g3{color:#d97706;color:var(--warn)}.grade.g1,.grade.g2{color:#dc2626;color:var(--bad)}.center{text-align:center}.spinner{animation:spin .8s linear infinite;border:3px solid #e6e8ee;border-top-color:#635bff;border:3px solid var(--line);border-radius:50%;border-top-color:var(--brand);height:28px;margin:40px auto;width:28px}@keyframes spin{to{transform:rotate(1turn)}}.dropzone{background:#f7f8fb;background:var(--bg);border:2px dashed #e6e8ee;border:2px dashed var(--line);border-radius:14px;border-radius:var(--radius);color:#6b7280;color:var(--muted);cursor:pointer;padding:30px 18px;text-align:center;transition:border-color .15s ease,background .15s ease,transform .05s ease}.dropzone.drag,.dropzone:hover{border-color:#635bff;border-color:var(--brand)}.dropzone.drag{background:#eef0ff;color:#635bff;color:var(--brand);transform:scale(1.01)}.dropzone.busy{cursor:default;opacity:.65}.dropzone .dz-icon{display:block;font-size:30px;margin-bottom:8px}.dropzone .dz-main{color:#1f2430;color:var(--ink);font-weight:600}.dropzone.drag .dz-main{color:#635bff;color:var(--brand)}.dropzone .dz-sub{font-size:12px;margin-top:4px}.file-chip{align-items:center;background:#eef0f6;border:1px solid #e6e8ee;border:1px solid var(--line);border-radius:999px;color:#1f2430;color:var(--ink);display:inline-flex;font-size:13px;gap:8px;padding:5px 6px 5px 12px}.file-chip button{background:#0000;border:none;color:#6b7280;color:var(--muted);cursor:pointer;font-size:16px;line-height:1;padding:0 4px}.file-chip button:hover{color:#dc2626;color:var(--bad)}.level-chips{display:flex;flex-wrap:wrap;gap:6px}.chip{background:#fff;border:1px solid #e6e8ee;border:1px solid var(--line);border-radius:999px;color:#1f2430;color:var(--ink);cursor:pointer;font-size:12px;font-weight:600;padding:5px 11px}.chip:disabled{cursor:default;opacity:.4}.chip.on{border-color:#635bff;border-color:var(--brand);box-shadow:0 0 0 2px #635bff2e}.lv-A1{background:#e7f6ec;color:#15803d}.lv-A2{background:#d9f2e4;color:#128a4e}.lv-B1{background:#e6efff;color:#2563eb}.lv-B2{background:#dbe7ff;color:#1d4ed8}.lv-C1{background:#efe7ff;color:#7c3aed}.lv-C2{background:#f3e8ff;color:#6d28d9}.lv-none{background:#eef0f6;color:#6b7280}.chip.lv-A1,.chip.lv-A2,.chip.lv-B1,.chip.lv-B2,.chip.lv-C1,.chip.lv-C2{border-color:#0000}.wordpick{border:1px solid #e6e8ee;border:1px solid var(--line);border-radius:10px;max-height:320px;overflow-y:auto}.wordpick-row{align-items:center;border-bottom:1px solid #e6e8ee;border-bottom:1px solid var(--line);cursor:pointer;display:flex;font-size:15px;gap:10px;padding:9px 12px}.wordpick-row:last-child{border-bottom:none}.wordpick-row input{flex:0 0 auto;width:auto}.wordpick-row .wp-text{flex:1 1;opacity:.55;overflow-wrap:anywhere}.wordpick-row.on .wp-text{font-weight:600;opacity:1}.wordpick-row .badge{flex:0 0 auto}.notice{background:#eef6ff;border:1px solid #d6e2ff;border-radius:10px;color:#4b45cc;color:var(--brand-dark);font-size:13px;margin-bottom:10px;padding:9px 12px}
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