:root{--bg:#f5f7fb;--card:#fff;--txt:#172033;--muted:#6b7280;--brand:#243b7b;--line:#e5e7eb;--accent:#0ea5e9}*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--txt);font-size:14px}.layout{display:flex;min-height:100vh}.sidebar{width:250px;background:#111827;color:#fff;padding:22px;position:fixed;top:0;bottom:0}.brand{font-weight:800;font-size:20px;margin-bottom:24px}.nav a{display:block;color:#d1d5db;text-decoration:none;padding:11px 12px;border-radius:10px;margin:5px 0}.nav a:hover,.nav a.active{background:#243b7b;color:#fff}.main{margin-left:250px;padding:28px;width:calc(100% - 250px)}.top{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:0 8px 28px rgba(15,23,42,.05);margin-bottom:18px}.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}.col-6{grid-column:span 6}.col-12{grid-column:span 12}label{font-weight:650;display:block;margin-bottom:6px}input,textarea,select{width:100%;padding:11px 12px;border:1px solid #d9dee8;border-radius:10px;background:#fff}button,.btn{border:0;background:var(--brand);color:#fff;padding:10px 14px;border-radius:10px;text-decoration:none;display:inline-block;cursor:pointer}.btn.light{background:#eef2ff;color:#243b7b}.btn.danger{background:#b91c1c}table{width:100%;border-collapse:collapse;background:#fff;border-radius:14px;overflow:hidden}th,td{text-align:left;padding:11px;border-bottom:1px solid var(--line);vertical-align:middle}th{background:#f8fafc;color:#475569;font-size:12px;text-transform:uppercase}.muted{color:var(--muted)}.login{max-width:420px;margin:70px auto}.public{max-width:920px;margin:35px auto;padding:20px}.certframe{width:100%;height:620px;border:1px solid var(--line);border-radius:14px}.logo{max-height:42px}.pill{display:inline-block;padding:5px 10px;border-radius:99px;background:#dcfce7;color:#166534;font-weight:700;font-size:12px}@media(max-width:800px){.sidebar{position:relative;width:100%}.layout{display:block}.main{margin-left:0;width:100%;padding:16px}.col-6{grid-column:span 12}.certframe{height:420px}}