:root{--bg:#f5f7fb;--card:#ffffff;--text:#1f2937;--muted:#6b7280;--primary:#2563eb;--danger:#dc2626;--border:#e5e7eb}*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text)}a{text-decoration:none;color:inherit}.login-page{min-height:100vh;display:grid;place-items:center;padding:24px;background:linear-gradient(135deg,#eef4ff,#fff7fb)}.login-card{width:100%;max-width:420px;background:#fff;border:1px solid var(--border);border-radius:18px;padding:28px;box-shadow:0 12px 30px rgba(31,41,55,.08)}.login-card h1{margin:0 0 8px;font-size:26px}.login-card p{margin:0 0 18px;color:var(--muted)}.field{margin-bottom:14px}.field label{display:block;font-size:13px;font-weight:700;margin-bottom:6px}.field input,.field select,.field textarea{width:100%;border:1px solid var(--border);border-radius:10px;padding:10px 12px;background:#fff}.btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:10px;padding:10px 14px;font-weight:700;cursor:pointer;background:var(--primary);color:#fff}.btn.secondary{background:#111827}.btn.danger{background:var(--danger)}.alert{padding:10px 12px;border-radius:10px;margin-bottom:14px;background:#fee2e2;color:#991b1b}.layout{display:flex;min-height:100vh}.sidebar{width:260px;background:#111827;color:#fff;padding:20px;position:fixed;top:0;bottom:0;left:0}.brand{font-size:20px;font-weight:800;margin-bottom:6px}.brand small{display:block;color:#9ca3af;font-size:12px;margin-top:4px}.nav{display:grid;gap:8px;margin-top:24px}.nav a{padding:10px 12px;border-radius:10px;color:#e5e7eb}.nav a:hover,.nav a.active{background:#1f2937}.content{margin-left:260px;flex:1}.topbar{height:70px;background:#fff;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;padding:0 24px}.main{padding:24px}.user-box{display:flex;gap:12px;align-items:center;color:var(--muted);font-size:14px}.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:20px}.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:18px;box-shadow:0 8px 20px rgba(31,41,55,.04)}.card h3{margin:0 0 8px;color:var(--muted);font-size:14px}.card strong{font-size:28px}.grid{display:grid;grid-template-columns:1fr 1.4fr;gap:18px}.table-wrap{overflow:auto}.table{width:100%;border-collapse:collapse;background:#fff;border-radius:14px;overflow:hidden}.table th,.table td{padding:12px;border-bottom:1px solid var(--border);text-align:left;font-size:14px}.table th{background:#f9fafb;color:#374151}.badge{display:inline-block;padding:5px 9px;border-radius:99px;font-size:12px;background:#e0f2fe;color:#075985}.form-card{background:#fff;border:1px solid var(--border);border-radius:16px;padding:18px}.form-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}@media(max-width:900px){.sidebar{position:relative;width:100%;height:auto}.layout{display:block}.content{margin-left:0}.cards{grid-template-columns:repeat(2,1fr)}.grid{grid-template-columns:1fr}}@media(max-width:600px){.cards,.form-row{grid-template-columns:1fr}.topbar{height:auto;align-items:flex-start;gap:12px;flex-direction:column;padding:16px}}