:root{--primary: #6366f1;--primary-hover: #4f46e5;--bg: #f1f5f9;--card-bg: #ffffff;--text: #1e293b;--text-light: #64748b;--border: #e2e8f0;--shadow: 0 1px 3px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .06);--radius: 12px;--radius-sm: 8px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;-webkit-font-smoothing:antialiased}.container{max-width:960px;margin:0 auto;padding:24px 20px}header{margin-bottom:0}header h1{font-size:28px;font-weight:800;color:var(--primary);letter-spacing:-.5px}.card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;margin-bottom:24px}@media(max-width:640px){.container{padding:16px 12px}.card{padding:16px}}