:root{--bg: #f8f9fa;--bg-card: #ffffff;--text: #1a1a2e;--text-muted: #6c757d;--primary: #2563eb;--primary-hover: #1d4ed8;--border: #dee2e6;--success: #16a34a;--danger: #dc2626;--warning: #f59e0b;--radius: 8px;--shadow: 0 1px 3px rgba(0, 0, 0, .1)}@media(prefers-color-scheme:dark){:root{--bg: #0f172a;--bg-card: #1e293b;--text: #e2e8f0;--text-muted: #94a3b8;--primary: #3b82f6;--primary-hover: #60a5fa;--border: #334155;--shadow: 0 1px 3px rgba(0, 0, 0, .3)}}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;border:none;border-radius:var(--radius);padding:.5rem 1rem;font-size:.875rem;font-weight:500;transition:background .15s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-danger{background:var(--danger);color:#fff}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.25rem}