* {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            min-height: 100vh;
            font-family: Arial, Helvetica, sans-serif;
            background: #f4f6f8;
            color: #1f2937;
        }

        .topbar {
            height: 74px;
            background: #ffffff;
            border-bottom: 1px solid #e5e7eb;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 7%;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            color: #111827;
        }

        .brand-mark {
            width: 38px;
            height: 38px;
            border-radius: 9px;
            background: #2563eb;
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }

        .brand-text {
            font-size: 22px;
            font-weight: 700;
        }

        .back-link {
            text-decoration: none;
            color: #4b5563;
            font-size: 14px;
            font-weight: 600;
        }

        .back-link:hover {
            color: #2563eb;
        }

        .page {
            min-height: calc(100vh - 74px);
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 40px 20px;
        }

        .login-card {
            width: 100%;
            max-width: 430px;
            background: white;
            border: 1px solid #e5e7eb;
            border-radius: 16px;
            padding: 34px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
        }

        .login-title {
            font-size: 28px;
            font-weight: 700;
            color: #111827;
            margin-bottom: 8px;
            text-align: center;
        }

        .login-description {
            text-align: center;
            color: #6b7280;
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 28px;
        }

        .form-group {
            margin-bottom: 18px;
        }

        label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 7px;
            color: #374151;
        }

        input {
            width: 100%;
            height: 46px;
            border: 1px solid #d1d5db;
            border-radius: 8px;
            padding: 0 13px;
            font-size: 15px;
            outline: none;
            background: white;
        }

        input:focus {
            border-color: #2563eb;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.10);
        }

        .login-button {
            width: 100%;
            height: 47px;
            border: 0;
            border-radius: 8px;
            background: #2563eb;
            color: white;
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            margin-top: 5px;
        }

        .login-button:hover {
            background: #1d4ed8;
        }

        .error-box {
            background: #fee2e2;
            border: 1px solid #fecaca;
            color: #991b1b;
            padding: 11px 12px;
            border-radius: 8px;
            font-size: 14px;
            margin-bottom: 18px;
        }

        .login-note {
            margin-top: 22px;
            text-align: center;
            color: #9ca3af;
            font-size: 12px;
            line-height: 1.5;
        }