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

        body {
            font-family: 'Kanit', sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow-x: hidden;
        }

        /* Animated background */
        body::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="%23ffffff" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="%23ffffff" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="%23ffffff" opacity="0.15"/><circle cx="10" cy="50" r="0.5" fill="%23ffffff" opacity="0.15"/><circle cx="90" cy="30" r="0.5" fill="%23ffffff" opacity="0.15"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
            pointer-events: none;
            z-index: 1;
        }

        .login-container {
            position: relative;
            z-index: 2;
            width: 100%;
            max-width: 450px;
            margin: 20px;
        }

        .login-card {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            border-radius: 24px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1), 0 0 0 1px rgba(255, 255, 255, 0.2);
            padding: 40px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: all 0.3s ease;
            animation: slideUp 0.6s ease-out;
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .login-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
        }

        .logo-section {
            text-align: center;
            margin-bottom: 30px;
        }

        .logo-container {
            display: inline-flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 20px;
        }

        .logo-container img {
            transition: transform 0.3s ease;
        }

        .logo-container:hover img {
            transform: scale(1.05);
        }

        .system-title {
            font-size: 22px;
            font-weight: 600;
            color: #2d3748;
            margin-bottom: 8px;
            line-height: 1.3;
        }

        .system-subtitle {
            font-size: 14px;
            color: #718096;
            margin-bottom: 20px;
        }

        .alert-message {
            background: linear-gradient(135deg, #fc8181, #f56565);
            color: white;
            padding: 12px 16px;
            border-radius: 12px;
            margin-bottom: 20px;
            font-size: 14px;
            text-align: center;
            border: none;
            animation: shake 0.5s ease-in-out;
        }

        @keyframes shake {

            0%,
            100% {
                transform: translateX(0);
            }

            25% {
                transform: translateX(-5px);
            }

            75% {
                transform: translateX(5px);
            }
        }

        .form-group {
            margin-bottom: 20px;
            position: relative;
        }

        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: #2d3748;
            font-size: 14px;
        }

        .form-control {
            width: 100%;
            padding: 14px 16px 14px 45px;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 16px;
            transition: all 0.3s ease;
            background: #f7fafc;
            font-family: 'Kanit', sans-serif;
        }

        .form-control:focus {
            outline: none;
            border-color: #667eea;
            background: white;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
            transform: translateY(-1px);
        }

        .input-icon {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: #a0aec0;
            font-size: 18px;
            transition: color 0.3s ease;
        }

        .form-control:focus+.input-icon {
            color: #667eea;
        }

        .btn-primary {
            width: 100%;
            padding: 16px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            border: none;
            border-radius: 12px;
            color: white;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            font-family: 'Kanit', sans-serif;
        }

        .btn-primary::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transform: rotate(45deg);
            transition: all 0.6s ease;
            opacity: 0;
        }

        .btn-primary:hover::before {
            animation: shine 0.6s ease-in-out;
        }

        @keyframes shine {
            0% {
                transform: translateX(-100%) translateY(-100%) rotate(45deg);
                opacity: 0;
            }

            50% {
                opacity: 1;
            }

            100% {
                transform: translateX(100%) translateY(100%) rotate(45deg);
                opacity: 0;
            }
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .divider {
            text-align: center;
            margin: 25px 0;
            position: relative;
        }

        .divider::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, #e2e8f0, transparent);
        }

        .divider span {
            background: rgba(255, 255, 255, 0.95);
            padding: 0 20px;
            position: relative;
            color: #718096;
            font-size: 14px;
        }

        .sso-login-btn {
            width: 100%;
            padding: 16px;
            background: linear-gradient(135deg, #4285f4, #34a853);
            border: none;
            border-radius: 12px;
            color: white;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            transition: all 0.3s ease;
            margin-bottom: 15px;
            font-family: 'Kanit', sans-serif;
            position: relative;
            overflow: hidden;
        }

        .sso-login-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(66, 133, 244, 0.3);
        }

        .sso-login-btn svg {
            width: 22px;
            height: 22px;
        }

        .links-section {
            margin-top: 30px;
        }

        .link-item {
            display: block;
            color: #667eea;
            text-decoration: none;
            padding: 8px 0;
            font-size: 14px;
            transition: all 0.3s ease;
            border-bottom: 1px solid transparent;
        }

        .link-item:hover {
            color: #764ba2;
            padding-left: 10px;
            border-bottom-color: #e2e8f0;
        }

        .footer {
            text-align: center;
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid #e2e8f0;
        }

        .footer p {
            margin: 5px 0;
            color: #718096;
            font-size: 12px;
        }

        .footer a {
            color: #667eea;
            text-decoration: none;
        }

        .password-toggle {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: #a0aec0;
            cursor: pointer;
            font-size: 18px;
            transition: color 0.3s ease;
        }

        .password-toggle:hover {
            color: #667eea;
        }

        /* Responsive */
        @media (max-width: 480px) {
            .login-card {
                padding: 30px 25px;
                margin: 10px;
                border-radius: 20px;
            }

            .system-title {
                font-size: 20px;
            }

            .form-control {
                padding: 12px 14px 12px 40px;
                font-size: 15px;
            }

            .btn-primary,
            .sso-login-btn {
                padding: 14px;
                font-size: 15px;
            }
        }

        /* Loading animation */
        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            border-top-color: white;
            animation: spin 1s ease-in-out infinite;
        }

        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }