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strong{color:#ffd60a}.wbw-header-container{margin-bottom:20px}.wbw-progress-row{color:var(--text-secondary);justify-content:space-between;align-items:center;margin-bottom:10px;font-size:13.5px;font-weight:500;display:flex}.wbw-level-badge{color:#64d2ff;border-radius:var(--radius-pill);background:#64d2ff1a;border:1px solid #64d2ff33;padding:2px 8px;font-size:12px}.wbw-progress-track{border-radius:var(--radius-pill);background:#ffffff14;width:100%;height:5px;position:relative;overflow:hidden}.wbw-progress-fill{background:var(--accent-gradient);border-radius:var(--radius-pill);height:100%;transition:width .3s cubic-bezier(.16,1,.3,1);box-shadow:0 0 8px #0a84ff80}.wbw-sentence-card{border:1px solid var(--glass-border-subtle);border-radius:var(--radius-md);background:#0006;align-items:stretch;min-height:116px;margin-bottom:22px;padding:16px;display:flex;box-shadow:inset 0 2px 8px #0009}.wbw-form-full{width:100%;display:flex}.wbw-input-full{font-family:var(--font-family-system);letter-spacing:-.015em;border:1.5px solid var(--glass-border);border-radius:var(--radius-sm);resize:none;white-space:pre-wrap;word-break:break-word;width:100%;min-height:84px;max-height:240px;color:var(--text-primary);caret-color:var(--accent-blue);transition:var(--transition-spring);background:#ffffff0d;outline:none;padding:16px 18px;font-size:18px;font-weight:500;line-height:1.55;overflow-y:auto;box-shadow:inset 0 2px 4px #0000004d}.wbw-input-full::placeholder{color:var(--text-tertiary);font-size:14.5px;line-height:1.5}.wbw-input-full:focus{border-color:var(--accent-blue);box-shadow:0 0 0 4px var(--accent-blue-glow), var(--glass-inner-specular);background:#ffffff14}.wbw-input-full.correct{border-color:var(--color-success);background:var(--color-success-bg);box-shadow:0 0 0 4px #30d15840, var(--color-success-glow);color:#d1fadf}.wbw-input-full.wrong{border-color:var(--color-error);background:var(--color-error-bg);box-shadow:0 0 0 4px #ff453a40, var(--color-error-glow);animation:.35s cubic-bezier(.36,.07,.19,.97) both shake}@keyframes shake{10%,90%{transform:translate(-1px)}20%,80%{transform:translate(2px)}30%,50%,70%{transform:translate(-4px)}40%,60%{transform:translate(4px)}}.wbw-done-card{color:var(--color-success);align-items:center;gap:12px;font-size:16.5px;font-weight:500;line-height:1.5;display:flex}.wbw-done-icon{background:#30d1582e;border:1px solid #30d15859;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:24px;height:24px;display:flex;box-shadow:0 0 10px #30d1584d}.wbw-controls{flex-wrap:wrap;gap:10px;display:flex}.wbw-btn{border:1px solid 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#0a84ff40}.wbw-btn:disabled{opacity:.3;cursor:not-allowed;background:#ffffff05;border-color:#0000}.wbw-trail-container{border:1px solid var(--glass-border-subtle);border-radius:var(--radius-sm);background:#ffffff08;flex-wrap:wrap;align-items:center;gap:6px;margin-bottom:16px;padding:12px 14px;display:flex}.wbw-trail-title{text-transform:uppercase;letter-spacing:.06em;width:100%;color:var(--text-tertiary);margin-bottom:4px;font-size:11px;font-weight:600}.wbw-token-chip{border-radius:var(--radius-pill);letter-spacing:-.01em;color:var(--text-secondary);background:#ffffff0f;border:1px solid #ffffff1a;align-items:center;padding:4px 10px;font-size:13px;font-weight:500;display:inline-flex}.wbw-token-chip.topic{color:#64d2ff;background:#0a84ff24;border-color:#0a84ff59;font-weight:600;box-shadow:0 0 8px #0a84ff33}.wbw-token-chip.next{color:var(--text-tertiary);background:#ffffff05;border:1px dashed 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strong{color:#fff}.wbw-hint-box{border-radius:var(--radius-sm);color:#ffd60a;background:#ffd60a14;border:1px solid #ffd60a40;align-items:center;gap:8px;margin-top:12px;padding:10px 14px;font-size:13px;animation:.2s fadeIn;display:flex}.wbw-peek-box{border-radius:var(--radius-sm);border:1px solid var(--glass-border);color:var(--text-secondary);background:#ffffff0a;margin-bottom:16px;padding:14px 16px;font-size:14.5px;line-height:1.6;animation:.2s fadeIn}.wbw-peek-box strong{color:var(--text-primary)}@keyframes fadeIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}@media (width<=600px){.app{width:100%;padding-left:14px;padding-right:14px;overflow-x:hidden}.app-header h1{font-size:24px}.mode-panel{padding:18px 14px}.mode-tabs{gap:3px;padding:3px}.mode-tabs button{gap:5px;padding:8px 6px;font-size:12.5px}.mode-tabs button svg{flex-shrink:0;width:13px;height:13px}.tab-label-full{display:none}.tab-label-short{display:inline}.plain-sentence,.clipped-sentence{font-size:16px}.wbw-controls{flex-direction:column}.wbw-btn{width:100%}.wbw-sentence-card{min-height:96px;padding:12px}.wbw-input-full{min-height:68px;padding:12px 14px;font-size:16px}}@media (width<=360px){.mode-tabs button{gap:3px;padding:7px 4px;font-size:11.5px}}main{flex:1}.app-footer{justify-content:center;align-items:center;margin-top:40px;padding:12px 0 6px;display:flex}.footer-pill{border-radius:var(--radius-pill);-webkit-backdrop-filter:blur(20px)saturate(180%);border:1px solid var(--glass-border);box-shadow:0 4px 16px #0006, var(--glass-inner-specular);color:var(--text-secondary);letter-spacing:.02em;transition:all var(--transition-quick);-webkit-user-select:none;user-select:none;background:#16161ba6;align-items:center;gap:8px;padding:7px 16px;font-size:12px;display:inline-flex}.footer-pill:hover{border-color:var(--glass-border-bright);box-shadow:0 6px 20px #00000080, var(--glass-inner-specular);background:#1e1e26d9}.footer-status-indicator{background:#30d158;border-radius:50%;flex-shrink:0;width:6.5px;height:6.5px;animation:2.5s ease-in-out infinite pulse-dot;box-shadow:0 0 8px #30d158}.footer-title{color:var(--text-secondary);font-weight:500}.footer-sep{opacity:.4;font-size:11px}.footer-hash{color:#64d2ff;letter-spacing:.04em;background:#64d2ff1a;border:1px solid #64d2ff33;border-radius:6px;padding:2px 6px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:11.5px;font-weight:600}@media (width>=700px){.app{max-width:860px;padding-top:calc(32px + env(safe-area-inset-top,0px));padding-bottom:calc(48px + env(safe-area-inset-bottom,0px))}.app-header{grid-template-columns:auto 1fr auto;align-items:center;gap:20px;display:grid}.app-header 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