* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: Arial, Helvetica, sans-serif; background: #f4f5f7; color: #222; }

.app-header { background: #1f2937; color: #fff; padding: 14px 20px; }
.header-inner { display: flex; justify-content: space-between; align-items: center; max-width: 1100px; margin: 0 auto; }
.brand { font-size: 20px; font-weight: bold; }
.user-box a.btn-link { color: #fff; margin-left: 12px; text-decoration: none; background: #374151; padding: 6px 12px; border-radius: 4px; }
.user-box span { margin-right: 6px; }

.app-menu { background: #111827; }
.app-menu ul { list-style: none; display: flex; max-width: 1100px; margin: 0 auto; }
.app-menu li a { display: block; padding: 12px 18px; color: #d1d5db; text-decoration: none; }
.app-menu li a:hover { background: #1f2937; color: #fff; }

.container { max-width: 1100px; margin: 20px auto; background: #fff; padding: 20px; border-radius: 6px; box-shadow: 0 1px 3px rgba(0,0,0,0.1); }

.app-footer { text-align: center; padding: 15px; color: #6b7280; font-size: 13px; margin-top: 30px; }

table { width: 100%; border-collapse: collapse; margin-top: 15px; }
table th, table td { border: 1px solid #e5e7eb; padding: 8px 10px; text-align: left; font-size: 14px; }
table th { background: #f9fafb; }

.btn { display: inline-block; background: #2563eb; color: #fff; padding: 8px 16px; border: none; border-radius: 4px; cursor: pointer; text-decoration: none; font-size: 14px; }
.btn:hover { background: #1d4ed8; }
.btn-secondary { background: #6b7280; }
.btn-danger { background: #dc2626; }
.btn-small { padding: 4px 10px; font-size: 12px; }

.form-group { margin-bottom: 15px; }
.form-group label { display: block; margin-bottom: 5px; font-weight: bold; font-size: 14px; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 8px 10px; border: 1px solid #d1d5db; border-radius: 4px; font-size: 14px;
}

.alert { padding: 10px 14px; border-radius: 4px; margin-bottom: 15px; font-size: 14px; }
.alert-success { background: #d1fae5; color: #065f46; }
.alert-error { background: #fee2e2; color: #991b1b; }

.login-wrapper { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-box { background: #fff; padding: 30px; border-radius: 8px; width: 100%; max-width: 380px; box-shadow: 0 2px 8px rgba(0,0,0,0.15); }
.login-box h2 { margin-bottom: 20px; text-align: center; }

.page-title { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }