:root{--bg: #f6f7f9;--panel: #ffffff;--border: #e5e7eb;--text: #111827;--muted: #6b7280;--primary: #2563eb;--primary-dark: #1d4ed8;--danger: #dc2626;--radius: 10px;--shadow: 0 1px 3px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .04)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);font-size:14px}h1,h2,h3{margin:0}a{color:inherit;text-decoration:none}.btn{display:inline-flex;align-items:center;gap:6px;background:var(--primary);color:#fff;border:none;padding:8px 14px;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;transition:background .15s}.btn:hover{background:var(--primary-dark)}.btn:disabled{opacity:.6;cursor:not-allowed}.btn.ghost{background:transparent;color:var(--text);border:1px solid 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