body{font-family:Arial,Helvetica,sans-serif;background:#f6f7fb;margin:0}
.container{max-width:1100px;margin:0 auto;padding:24px}
.nav{background:#1f2937;color:#fff;padding:12px 24px;display:flex;gap:16px;align-items:center}
.nav a{color:#fff;text-decoration:none;margin-right:12px}
.card{background:#fff;border-radius:12px;padding:20px;box-shadow:0 6px 20px rgba(0,0,0,.08);margin:16px 0}
.btn{display:inline-block;padding:10px 14px;border-radius:10px;border:1px solid #ddd;background:#fff;text-decoration:none}
.btn.primary{background:#2563eb;color:#fff;border-color:#2563eb}
.table{width:100%;border-collapse:collapse}
.table th,.table td{border-bottom:1px solid #eee;padding:10px;text-align:left}
.badge{padding:4px 10px;border-radius:999px;background:#e5e7eb}
.badge.warn{background:#fde68a}
.badge.danger{background:#fecaca}
.flash{background:#ecfeff;border:1px solid #a5f3fc;padding:10px;border-radius:8px;margin:10px 0}
input,select,textarea{width:100%;padding:10px;margin:6px 0 12px;border:1px solid #ddd;border-radius:8px}