:root{--bg: #f6f7f9;--card: #ffffff;--text: #1d2330;--muted: #6b7280;--border: #e3e6eb;--accent: #4f46e5;--danger: #c0392b;font-family:system-ui,-apple-system,Segoe UI,sans-serif;color:var(--text);background:var(--bg)}*{box-sizing:border-box}body{margin:0}header{display:flex;align-items:center;gap:24px;padding:12px 24px;background:var(--card);border-bottom:1px solid var(--border)}header nav{display:flex;gap:16px;flex:1}header nav a{color:var(--muted);text-decoration:none}header nav a.active{color:var(--accent);font-weight:600}main{padding:24px;max-width:1100px;margin:0 auto}h1,h2{margin:0 0 16px}.row{display:flex;justify-content:space-between;align-items:center}.center{min-height:100vh;display:grid;place-items:center}.card{background:var(--card);border:1px solid var(--border);border-radius:8px;padding:24px;display:flex;flex-direction:column;gap:12px}.narrow{width:100%;max-width:420px}label{display:flex;flex-direction:column;gap:4px;font-size:14px}input,select{padding:8px 10px;border:1px solid var(--border);border-radius:6px;font:inherit}button,.button{padding:8px 14px;border:0;border-radius:6px;background:var(--accent);color:#fff;font:inherit;cursor:pointer;text-decoration:none;display:inline-block}button:disabled{opacity:.6}button.link{background:none;color:var(--accent);padding:0}button.link.danger{color:var(--danger)}table{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--border);border-radius:8px;overflow:hidden}th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border);font-size:14px}th{color:var(--muted);font-weight:500}form.inline{display:flex;gap:8px;margin-top:16px}.muted{color:var(--muted);font-size:14px}.error{color:var(--danger)}.mono{font-family:ui-monospace,monospace;font-size:12px}.tier{padding:2px 8px;border-radius:10px;font-size:12px;background:#eef}.tier-platinum{background:#e8e4ff;color:#4c1d95}.tier-premium{background:#fff4d6;color:#8a5a00}