:root{--bg:#06060c;--bg-surface:#0e0c1a;--bg-overlay:#16132a;--bg-header:#06060ceb;--border:#6e58c838;--border-subtle:#503ca024;--text:#ede9f8;--text-muted:#c0b8e0;--text-subtle:#8878b0;--accent:#8b7cf8;--accent-emphasis:#6d5ce8;--accent-bg:#8b7cf81a;--accent-border:#8b7cf852;--gold:#f0c040;--gold-bg:#f0c0401a;--gold-border:#f0c04052;--success:#f0c040;--success-bg:#f0c04014;--success-border:#f0c04059;--danger:#f85149;--danger-bg:#f851491a;--danger-border:#f8514961;--warning:#f0c040;--radius-sm:4px;--radius:6px;--radius-lg:10px;--radius-xl:14px;--shadow:0 1px 4px #0009;--shadow-md:0 4px 16px #0009;--shadow-focus:0 0 0 3px var(--accent-bg);--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;--transition:.15s ease;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;font-family:var(--font-sans);color:var(--text);background-color:var(--bg);font-size:14px;line-height:1.6}[data-theme=light]{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#f4f2ff;--bg-surface:#eceaf8;--bg-overlay:#e2defc;--bg-header:#f4f2ffeb;--border:#6450be33;--border-subtle:#503ca01f;--text:#1c1640;--text-muted:#4a3f78;--text-subtle:#7060a8;--accent:#6b5ce7;--accent-emphasis:#5548d0;--accent-bg:#6b5ce71a;--accent-border:#6b5ce752;--gold:#b07800;--gold-bg:#b078001a;--gold-border:#b0780059;--success:#b07800;--success-bg:#b0780014;--success-border:#b0780059;--danger:#c73030;--danger-bg:#c730301a;--danger-border:#c7303059;--shadow:0 1px 4px #0000001a;--shadow-md:0 4px 16px 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24px;display:flex;overflow:hidden}.btn-primary,.btn-secondary,.btn-icon,.btn-back{cursor:pointer;font-family:var(--font-sans);border-radius:var(--radius);transition:all var(--transition);white-space:nowrap;-webkit-user-select:none;user-select:none;border:none;align-items:center;gap:6px;font-size:13px;font-weight:500;display:inline-flex}.btn-primary{background:var(--accent);color:#fff;padding:7px 16px;box-shadow:0 2px 12px #8b7cf866}.btn-primary:hover{background:var(--accent-emphasis);box-shadow:0 4px 20px #8b7cf880}.btn-primary:active{transform:scale(.97)}.btn-primary:disabled{opacity:.4;cursor:not-allowed;box-shadow:none}.btn-secondary{background:var(--bg-surface);color:var(--text-muted);border:1px solid var(--border);padding:7px 14px}.btn-secondary:hover{color:var(--text);border-color:var(--accent-border);background:var(--bg-overlay)}.btn-icon{color:var(--text-muted);border:1px solid var(--border);background:0 0;padding:6px 10px;font-size:14px}.btn-icon:hover{color:var(--text);background:var(--bg-overlay)}.btn-back{color:var(--text-muted);background:0 0;margin-bottom:20px;padding:4px 0;font-size:13px}.btn-back:hover{color:var(--text)}.btn-hint{font-family:var(--font-mono);opacity:.8;background:#ffffff1a;border:1px solid #ffffff26;border-radius:3px;padding:1px 6px;font-size:11px}.locale-switcher{border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-surface);gap:2px;margin:0;padding:3px;display:flex}.locale-switcher legend{display:none}.locale-switcher button{border-radius:calc(var(--radius) - 2px);color:var(--text-muted);cursor:pointer;transition:all var(--transition);letter-spacing:.5px;background:0 0;border:none;padding:3px 10px;font-size:12px;font-weight:600}.locale-switcher button.active,.locale-switcher button[aria-pressed=true]{background:var(--accent);color:#fff}.locale-switcher button:not(.active):hover,.locale-switcher button:not([aria-pressed=true]):hover{color:var(--text);background:var(--bg-overlay)}.home{flex:1;grid-template-columns:3fr 7fr;gap:24px;min-height:0;padding:20px 0;display:grid}.home-left{flex-direction:column;align-self:start;gap:16px;display:flex}.home-right{flex-direction:column;min-height:0;display:flex}.hero{flex-direction:column;gap:6px;display:flex}.hero-kanji{letter-spacing:-2px;background:linear-gradient(135deg,#8b7cf8 0%,#c4aeff 50%,#f0c040 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:52px;font-weight:900;line-height:1}.hero-sub{color:var(--text-subtle);font-size:14px;font-family:var(--font-mono);letter-spacing:.3px}.settings-panel{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-xl);grid-template-columns:repeat(auto-fit,minmax(148px,1fr));gap:16px;padding:20px;display:grid}.settings-group{flex-direction:column;gap:8px;display:flex}.settings-group--disabled{opacity:.4;pointer-events:none}.settings-label{letter-spacing:.8px;text-transform:uppercase;color:var(--text-subtle);font-size:10px;font-weight:700}.settings-btns{flex-wrap:wrap;gap:4px;display:flex}.settings-btn{border-radius:var(--radius);border:1px solid var(--border);color:var(--text-muted);cursor:pointer;transition:all var(--transition);font-size:12px;font-weight:500;font-family:var(--font-sans);background:0 0;padding:5px 12px}.settings-btn.active{background:var(--accent-bg);border-color:var(--accent-border);color:var(--accent);font-weight:600}.settings-btn:hover:not(.active):not(:disabled){border-color:var(--accent-border);color:var(--text);background:var(--bg-overlay)}.home-cta{flex-direction:column;align-items:flex-start;gap:10px;display:flex}.btn-large{letter-spacing:.2px;padding:11px 28px;font-size:15px;font-weight:600}.btn-large .btn-hint{padding:2px 8px;font-size:12px}.home-drill-count{color:var(--text-subtle);font-size:12px;font-family:var(--font-mono)}.drill-section{flex-direction:column;flex:1;min-height:0;display:flex}.terminal-dark{--lightningcss-light: 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var(--border-subtle);justify-content:space-between;align-items:center;margin-bottom:20px;padding-bottom:14px;display:flex}.session-progress-label{letter-spacing:.5px;text-transform:uppercase;color:var(--text-subtle);font-size:11px;font-weight:700}.session-progress-count{font-family:var(--font-mono);color:var(--text-subtle);font-variant-numeric:tabular-nums;font-size:12px}.concept-block{border:1px solid var(--accent-border);border-radius:var(--radius-lg);color:var(--text-muted);white-space:pre-line;font-size:12px;font-family:var(--font-mono);background:#8b7cf80f;padding:14px 16px;line-height:1.75}.concept-label{letter-spacing:.8px;color:var(--accent);text-transform:uppercase;margin-bottom:8px;font-size:10px;font-weight:700;display:block}.drill-runner{flex-direction:column;gap:14px;display:flex}.drill-header{align-items:center;gap:10px;display:flex}.drill-title{color:var(--text);font-size:17px}.drill-tier{border-radius:var(--radius-lg);background:var(--accent-bg);color:var(--accent);border:1px solid var(--accent-border);letter-spacing:.3px;padding:2px 8px;font-size:10px;font-weight:700}.drill-description{color:var(--text-muted);white-space:pre-line;font-size:13px;line-height:1.65}.drill-goal-text{border-radius:var(--radius);background:var(--bg-overlay);border:1px solid var(--border-subtle);align-items:center;gap:8px;padding:8px 12px;font-size:13px;display:flex}.drill-goal-label{color:var(--text-subtle);font-weight:500}code{font-family:var(--font-mono);border-radius:var(--radius-sm);background:var(--bg-overlay);color:var(--text);border:1px solid 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blade-reveal{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.result-icon{color:var(--gold);margin:0;font-size:20px}.result-time{font-family:var(--font-mono);color:var(--text);letter-spacing:-.5px;margin:0;font-size:28px;font-weight:700}.result-badge{color:var(--text-muted);font-size:12px;font-family:var(--font-sans);letter-spacing:0;margin-left:8px;font-weight:400}.result-msg{color:var(--text-muted);margin:0;font-size:14px}.result-head{align-items:center;gap:12px;display:flex}.result-actions{flex-wrap:wrap;gap:10px;display:flex}.session-summary{flex-direction:column;gap:18px;display:flex}.summary-eyebrow{letter-spacing:.8px;text-transform:uppercase;color:var(--accent);font-size:11px;font-weight:700}.summary-title{letter-spacing:-.5px;font-size:26px;font-weight:700}.summary-stats{grid-template-columns:repeat(3,minmax(100px,1fr));gap:10px;display:grid}.summary-stat{border-radius:var(--radius-lg);background:var(--bg-surface);border:1px solid var(--border-subtle);flex-direction:column;align-items:center;gap:4px;padding:14px 12px;display:flex}.summary-stat-num{font-family:var(--font-mono);color:var(--text);letter-spacing:-.3px;font-size:22px;font-weight:700}.summary-stat-label{color:var(--text-muted);letter-spacing:.3px;font-size:11px}.summary-weak{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);flex-direction:column;gap:10px;padding:16px 18px;display:flex}.summary-weak-head{color:var(--text-muted);font-size:13px}.summary-weak-list{flex-direction:column;gap:4px;margin:0;padding:0;list-style:none;display:flex}.summary-weak-list li{border-radius:var(--radius);background:var(--bg);border:1px solid var(--border-subtle);justify-content:space-between;align-items:center;padding:6px 10px;font-size:13px;display:flex}.summary-weak-title{color:var(--text)}.summary-actions{gap:10px;display:flex}.summary-actions .btn-primary{padding:10px 22px;font-size:14px}.drill-loading,.drill-error,.drill-empty{color:var(--text-muted);padding:32px 0;font-size:14px}kbd{font-family:var(--font-mono);background:var(--bg-overlay);border:1px solid var(--border);color:var(--text-muted);text-align:center;border-radius:3px;min-width:18px;padding:1px 6px;font-size:11px;display:inline-block}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.theme-toggle{color:var(--text-muted);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;transition:all var(--transition);background:0 0;padding:6px 10px;font-size:14px}.theme-toggle:hover{color:var(--text);background:var(--bg-overlay)}