:root{--bg:#f5f7fb;--card:#fff;--text:#172033;--muted:#697386;--primary:#2563eb;--ok:#0f9f6e;--danger:#dc2626;--border:#e5e9f2}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text)}.app{display:grid;grid-template-columns:260px 1fr;min-height:100vh}aside{background:#0f172a;color:white;padding:24px;position:sticky;top:0;height:100vh}.brand{font-size:22px;font-weight:800;margin-bottom:28px;display:flex;gap:10px;align-items:center}nav{display:grid;gap:8px}nav a{color:#dbeafe;text-decoration:none;padding:12px 14px;border-radius:14px}nav a:hover{background:rgba(255,255,255,.1)}main{padding:28px}header{margin-bottom:20px}header h1{margin:0;font-size:30px}header p{margin:6px 0 0;color:var(--muted)}.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-bottom:18px}.stat,.card{background:var(--card);border:1px solid var(--border);border-radius:24px;box-shadow:0 12px 40px rgba(15,23,42,.06)}.stat{padding:18px}.stat span{display:block;color:var(--muted)}.stat strong{display:block;font-size:32px;margin:8px 0}.stat small{color:var(--muted)}.card{padding:20px;margin-bottom:18px;overflow:auto}.card h2{margin-top:0}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:13px;border-bottom:1px solid var(--border);font-size:14px}th{color:var(--muted);font-weight:700;background:#f8fafc}.login-body{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#eff6ff,#f8fafc)}.login-card{width:min(420px,92vw);background:white;border-radius:28px;padding:28px;box-shadow:0 24px 80px rgba(37,99,235,.16)}.login-card h1{margin:0}.login-card p{color:var(--muted)}label{display:grid;gap:8px;margin:12px 0;color:var(--muted);font-weight:600}input,textarea{width:100%;border:1px solid var(--border);border-radius:14px;padding:13px 14px;font:inherit}textarea{min-height:110px}button{border:0;background:var(--primary);color:white;border-radius:14px;padding:13px 18px;font-weight:800;cursor:pointer}.alert{background:#fef2f2;color:var(--danger);padding:12px;border-radius:14px;margin:10px 0}.success{background:#ecfdf5;color:var(--ok);padding:12px;border-radius:14px;margin:10px 0}.form{max-width:680px}code{background:#f1f5f9;padding:3px 7px;border-radius:8px}@media(max-width:900px){.app{grid-template-columns:1fr}aside{height:auto;position:relative}.stats{grid-template-columns:1fr 1fr}}@media(max-width:560px){main{padding:16px}.stats{grid-template-columns:1fr}th,td{font-size:13px;padding:10px}}