:root{--rwb-brand: #0A2C66;--rwb-accent: #41b1a6;--rwb-bg: #f8fafc;--rwb-text: #0A2C66}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,Arial,Helvetica,sans-serif;color:var(--rwb-text);background:var(--rwb-bg)}.app{display:grid;grid-template-rows:auto 1fr;min-height:100%}header{display:flex;gap:24px;align-items:center;justify-content:space-between;padding:16px 24px;border-bottom:1px solid #e5e7eb;background:#fff;position:sticky;top:0;z-index:10}h1{margin:0;font-size:18px;letter-spacing:.2px}.controls{display:flex;gap:16px;align-items:end}.actions{display:flex;gap:8px;align-items:center}.actions button{border:1px solid #e5e7eb;background:var(--rwb-brand);color:#fff;border-radius:6px;padding:8px 10px;font-size:13px;cursor:pointer}.actions button:hover{background:#123a80}label{display:grid;gap:6px;font-size:12px}input,select,textarea{border:1px solid #e5e7eb;border-radius:6px;padding:8px 10px;font-size:14px;color:var(--rwb-text);background:#fff}textarea{width:320px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace}main{display:grid;grid-template-columns:360px 1fr;gap:24px;padding:16px 24px}.sidebar{display:grid;gap:10px}.hint{margin:10px 0 0;font-size:12px;color:#6b7280}.preview{display:grid}.chart-card{display:grid;grid-template-rows:auto 1fr;gap:8px;background:#fff;border:1px solid #e5e7eb;border-radius:8px;padding:12px;box-shadow:0 1px 2px #0000000a}.chart-card h2{font-size:16px;margin:0 0 6px;color:var(--rwb-brand)}.chart-area{height:800px}