:root{--primary: #1f3a5f;--accent: #3b7bb8;--border: #d0d7de;--bg: #f6f8fa;--text: #24292f;--muted: #57606a;--danger: #cf222e;--success: #1f883d;--radius: 6px}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;color:var(--text);background:var(--bg)}header{background:var(--primary);color:#fff;padding:12px 24px;display:flex;justify-content:space-between;align-items:center}header a{color:#fff;text-decoration:none;font-weight:500}main{max-width:1100px;margin:24px auto;padding:0 24px}h1{font-size:22px;color:var(--primary)}h2{font-size:16px;color:var(--primary);border-bottom:1px solid var(--border);padding-bottom:6px}button{background:var(--primary);color:#fff;border:0;padding:8px 16px;border-radius:var(--radius);cursor:pointer;font-size:14px}button:hover{background:var(--accent)}button.secondary{background:#fff;color:var(--primary);border:1px solid var(--border)}button:disabled{opacity:.5;cursor:not-allowed}input,textarea,select{padding:8px 10px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;width:100%}label{display:block;margin-top:12px;font-size:13px;color:var(--muted)}.card{background:#fff;border:1px solid var(--border);border-radius:8px;padding:20px;margin-bottom:16px}table{width:100%;border-collapse:collapse}th,td{padding:10px;text-align:left;border-bottom:1px solid var(--border);font-size:14px}th{background:var(--bg);font-weight:500;color:var(--muted)}.status{display:inline-block;padding:3px 10px;border-radius:12px;font-size:12px;background:#eef0f3;color:var(--primary)}.error{color:var(--danger);font-size:13px;margin-top:8px}