:root{--bg: #f7f9fc;--surface: #ffffff;--text: #0f172a;--muted: #64748b;--border: #e2e8f0;--accent: #1976d2;--accent-100: #e3f2fd;--accent-200: #bbdefb;--success-100: #e8f5e9;--warning-100: #fff8e1}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji"}h1,h2,h3{color:var(--text)}p{color:var(--muted)}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}button{background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:6px 10px;line-height:1.2;cursor:pointer;transition:background .15s ease,border-color .15s ease,box-shadow .15s ease}button:hover{background:var(--accent-100);border-color:var(--accent-200);box-shadow:0 1px 2px #0000000f}button:disabled{opacity:.55;cursor:not-allowed}hr{border:none;height:1px;background:var(--border)}details summary{cursor:pointer}pre{background:#0b1020;color:#e5e7eb;padding:10px;border-radius:8px;overflow:auto}.app-container{background:var(--surface);box-shadow:0 2px 8px #0000000f;border:1px solid var(--border);border-radius:12px}.banner{background:#f8fafc;border:1px solid var(--border);border-left:4px solid var(--accent);border-radius:8px;color:#1e293b}.line-card{box-shadow:0 1px 2px #0000000a;border:1px solid var(--border);border-radius:8px}