:root{--bg:#f0faf8;--ink:#1f2a2e;--primary:#0d9488;--card:#fff;--border:#d1e7e3;color:var(--ink);background:var(--bg);font-family:Segoe UI,system-ui,sans-serif}*{box-sizing:border-box}body{margin:0}a{color:var(--primary)}.layout{max-width:960px;margin:0 auto;padding:24px}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;margin-bottom:16px;padding:16px}button,.btn{background:var(--primary);color:#fff;cursor:pointer;border:0;border-radius:10px;padding:10px 16px}input,textarea{border:1px solid var(--border);border-radius:8px;width:100%;margin:6px 0 12px;padding:10px}nav{flex-wrap:wrap;gap:12px;margin-bottom:20px;display:flex}table{border-collapse:collapse;width:100%}td,th{text-align:left;border-bottom:1px solid var(--border);padding:8px}.error{color:#dc2626}