:root{--color-bg: #f7f7f5;--color-surface: #ffffff;--color-border: #e2e2df;--color-text: #1c1c1a;--color-muted: #6b6b66;--color-accent: #d1381f;--color-accent-dark: #a92c17}*{box-sizing:border-box}html,body{height:100%}body{margin:0;font-family:Segoe UI,system-ui,-apple-system,Roboto,sans-serif;background:var(--color-bg);color:var(--color-text)}button{font-family:inherit}a{color:var(--color-accent-dark)}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;padding:1.5rem}.btn{display:inline-block;border:none;border-radius:8px;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;text-decoration:none;text-align:center;cursor:pointer;background:var(--color-accent);color:#fff}.btn:disabled{opacity:.5;cursor:not-allowed}.btn:hover:not(:disabled){background:var(--color-accent-dark)}.btn-secondary{background:transparent;color:var(--color-text);border:1px solid var(--color-border)}.btn-secondary:hover:not(:disabled){background:var(--color-border)}