:root,[data-theme=light]{color-scheme:light;--bg:#f8fafc;--surface:#ffffff;--surface-2:#f1f5f9;--border:#e5e7eb;--text:#111827;--muted:#6b7280;--track:#e5e7eb;--accent:#2563eb;--accent-bg:#eff6ff;--score-good:#16a34a;--score-mid:#d97706;--score-bad:#dc2626;--tone-bad-bg:#fef2f2;--tone-bad-bd:#fecaca;--tone-bad-fg:#b91c1c;--shadow:0 1px 3px rgba(0,0,0,0.06)}[data-theme=dark]{color-scheme:dark;--bg:#0b1120;--surface:#161e2e;--surface-2:#1f2937;--border:#2b3648;--text:#e5e7eb;--muted:#94a3b8;--track:#2b3648;--accent:#3b82f6;--accent-bg:#1e293b;--score-good:#22c55e;--score-mid:#fbbf24;--score-bad:#f87171;--tone-bad-bg:rgba(248,113,113,0.1);--tone-bad-bd:rgba(248,113,113,0.35);--tone-bad-fg:#fca5a5;--shadow:0 1px 3px rgba(0,0,0,0.4)}*{box-sizing:border-box}body,html{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Hiragino Kaku Gothic ProN,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}button{font-family:inherit}input,textarea{color:var(--text)}.card,input,textarea{background:var(--surface)}.card{border:1px solid var(--border);border-radius:16px;padding:24px;box-shadow:var(--shadow)}.container{max-width:880px;margin:0 auto;padding:32px 20px 64px}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:10px;border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:18px;cursor:pointer}.icon-btn:hover{background:var(--surface-2)}