:root{--background:#f8fafc;--foreground:#0f172a;--muted:#64748b;--border:#e2e8f0;--card:#ffffff;--primary:#0f172a}*{box-sizing:border-box}body{margin:0;background:var(--background);color:var(--foreground);font-family:Arial,Helvetica,sans-serif}a{color:inherit;text-decoration:none}button,input{font:inherit}.container{width:min(1200px,calc(100% - 32px));margin:0 auto}.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:20px;box-shadow:0 1px 2px rgba(15,23,42,.04)}.btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:10px;padding:10px 14px;background:var(--primary);color:white;cursor:pointer}.input{width:100%;border:1px solid var(--border);border-radius:10px;padding:10px 12px;background:white}.muted{color:var(--muted)}