:root {
            --primary-blue: #2563eb;
            --primary-hover: #1d4ed8;
            --dark-navy: #0f172a;
            --slate-text: #64748b;
            --input-bg: #f8fafc;
            --input-border: #e2e8f0;
            --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
        }

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

        body {
            font-family: var(--font-family);
            background-color: #ffffff;
            color: var(--dark-navy);
            min-height: 100vh;
            overflow-x: hidden;
        }

        .auth-container {
            min-height: 100vh;
        }

        /* -------------------------------------------
           BÊN TRÁI: BANNER CHỈ CÓ ẢNH
        ------------------------------------------- */
        .auth-banner-side {
            background-image: url(../../images/login-banner.jpg);
            background-size: cover;
            background-position: center center;
            background-repeat: no-repeat;
            min-height: 100vh;
            position: relative;
        }

        /* Lớp overlay tinh tế để giữ độ sắc nét & tương phản */
        .auth-banner-side::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.05) 0%, rgba(15, 23, 42, 0.2) 100%);
            pointer-events: none;
        }

        /* -------------------------------------------
           BÊN PHẢI: FORM ĐĂNG NHẬP HIỆN ĐẠI
        ------------------------------------------- */
        .auth-form-side {
            min-height: 100vh;
            background: #ffffff;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 3rem 1.5rem;
            overflow: hidden;
        }

        /* Hiệu ứng sóng mờ / gradient ambient tinh tế ở góc dưới bên phải như mockup */
        .auth-form-side::before {
            content: '';
            position: absolute;
            bottom: -120px;
            right: -120px;
            width: 380px;
            height: 380px;
            background: radial-gradient(circle, rgba(239, 246, 255, 0.9) 0%, rgba(219, 234, 254, 0.4) 60%, transparent 80%);
            border-radius: 50%;
            pointer-events: none;
            z-index: 0;
        }

        .auth-form-side::after {
            content: '';
            position: absolute;
            top: -100px;
            right: -80px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(241, 245, 249, 0.8) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
            z-index: 0;
        }

        .auth-card {
            width: 100%;
            max-width: 420px;
            position: relative;
            z-index: 1;
        }

        /* Icon Shield Badge */
        .auth-logo-badge {
            width: 68px;
            height: 68px;
            border-radius: 20px;
            background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px auto;
            box-shadow: 0 12px 28px -6px rgba(37, 99, 235, 0.4),
                0 4px 10px -2px rgba(37, 99, 235, 0.2);
            position: relative;
            transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        .auth-logo-badge:hover {
            transform: scale(1.05) rotate(-3deg);
        }

        .auth-logo-badge svg {
            width: 34px;
            height: 34px;
            fill: #ffffff;
            filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.15));
        }

        /* Tiêu đề & phụ đề */
        .auth-title {
            font-size: 27px;
            font-weight: 800;
            color: var(--dark-navy);
            letter-spacing: -0.5px;
            text-align: center;
            margin-bottom: 8px;
        }

        .auth-subtitle {
            font-size: 14.5px;
            color: var(--slate-text);
            text-align: center;
            margin-bottom: 34px;
            font-weight: 400;
        }

        /* Nhóm ô nhập liệu (Input Group) */
        .auth-input-group {
            position: relative;
            margin-bottom: 20px;
        }

        .auth-input-icon {
            position: absolute;
            left: 18px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 19px;
            color: #94a3b8;
            pointer-events: none;
            transition: color 0.25s ease;
            z-index: 2;
        }

        .auth-input {
            width: 100%;
            height: 52px;
            padding: 12px 48px 12px 50px;
            background-color: var(--input-bg);
            border: 1.5px solid var(--input-border);
            border-radius: 12px;
            font-size: 14.5px;
            color: var(--dark-navy);
            font-weight: 500;
            transition: all 0.25s ease;
            outline: none;
        }

        .auth-input::placeholder {
            color: #94a3b8;
            font-weight: 400;
        }

        .auth-input:hover {
            border-color: #cbd5e1;
            background-color: #ffffff;
        }

        .auth-input:focus {
            background-color: #ffffff;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
        }

        .auth-input-group:focus-within .auth-input-icon {
            color: var(--primary-blue);
        }

        /* Nút ẩn/hiện mật khẩu */
        .btn-toggle-password {
            position: absolute;
            right: 14px;
            top: 50%;
            transform: translateY(-50%);
            background: transparent;
            border: none;
            color: #94a3b8;
            font-size: 18px;
            padding: 6px;
            cursor: pointer;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s ease;
            z-index: 2;
        }

        .btn-toggle-password:hover {
            color: var(--dark-navy);
            background-color: rgba(241, 245, 249, 0.8);
        }

        /* Checkbox & Quên mật khẩu */
        .auth-options {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 26px;
            font-size: 13.5px;
        }

        .form-check-input {
            width: 18px;
            height: 18px;
            margin-top: 1px;
            border-radius: 6px;
            border: 1.5px solid #cbd5e1;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .form-check-input:checked {
            background-color: var(--primary-blue);
            border-color: var(--primary-blue);
            box-shadow: 0 2px 6px rgba(37, 99, 235, 0.3);
        }

        .form-check-label {
            color: #475569;
            font-weight: 500;
            cursor: pointer;
            user-select: none;
            margin-left: 6px;
        }

        .forgot-link {
            color: var(--primary-blue);
            font-weight: 600;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        .forgot-link:hover {
            color: var(--primary-hover);
            text-decoration: underline;
        }

        /* Nút Đăng nhập */
        .btn-auth-submit {
            width: 100%;
            height: 52px;
            background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
            border: none;
            border-radius: 12px;
            color: #ffffff;
            font-size: 15.5px;
            font-weight: 600;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            cursor: pointer;
            transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: 0 8px 20px -4px rgba(37, 99, 235, 0.4);
        }

        .btn-auth-submit:hover {
            background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
            transform: translateY(-2px);
            box-shadow: 0 12px 24px -4px rgba(37, 99, 235, 0.5);
            color: #ffffff;
        }

        .btn-auth-submit:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        }

        .btn-auth-submit i {
            transition: transform 0.25s ease;
        }

        .btn-auth-submit:hover i {
            transform: translateX(4px);
        }

        /* Đường phân cách & ghi chú bảo mật ở chân trang */
        .auth-divider {
            height: 1px;
            background-color: #f1f5f9;
            margin: 36px 0 24px 0;
            position: relative;
        }

        .auth-footer-badge {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 13px;
            color: #94a3b8;
            font-weight: 500;
        }

        .auth-footer-badge svg {
            width: 16px;
            height: 16px;
            fill: #94a3b8;
        }

        /* Thông báo Alert */
        .alert-custom {
            border-radius: 10px;
            font-size: 14px;
            padding: 12px 16px;
            margin-bottom: 22px;
            border: none;
        }

        .alert-custom-danger {
            background-color: #fef2f2;
            color: #991b1b;
            border-left: 4px solid #ef4444;
        }

        .alert-custom-success {
            background-color: #f0fdf4;
            color: #166534;
            border-left: 4px solid #22c55e;
        }

        /* Responsive điều chỉnh */
        @media (max-width: 991.98px) {
            .auth-form-side {
                padding: 4rem 1.5rem;
            }

            .auth-title {
                font-size: 24px;
            }
        }

        /* -------------------------------------------
           TỐI ƯU CHO BLADE FORM COMPONENT TRONG AUTH
        ------------------------------------------- */
        .auth-card .input-group {
            margin-bottom: 20px;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
            transition: all 0.25s ease;
        }

        .auth-card .input-group .input-group-text {
            background-color: var(--input-bg);
            border-color: var(--input-border);
            color: #94a3b8;
            padding-left: 18px;
            padding-right: 14px;
            font-size: 19px;
            transition: all 0.25s ease;
        }

        .auth-card .input-group .form-control {
            height: 52px;
            background-color: var(--input-bg);
            border-color: var(--input-border);
            font-size: 14.5px;
            color: var(--dark-navy);
            font-weight: 500;
            transition: all 0.25s ease;
        }

        .auth-card .input-group .form-control:focus {
            background-color: #ffffff;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
        }

        .auth-card .input-group:focus-within {
            box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
            border-radius: 12px;
        }

        .auth-card .input-group:focus-within .input-group-text {
            border-color: var(--primary-blue);
            color: var(--primary-blue);
            background-color: #ffffff;
        }

        .auth-card .input-group:focus-within .form-control {
            background-color: #ffffff;
            border-color: var(--primary-blue);
            box-shadow: none;
        }