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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #312e2b;
            color: white;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        #slideshow-container {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            z-index: 1;
        }
        .slideshow-image {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-size: cover;
            background-position: center center;
            opacity: 0;
            transition: opacity 1.5s ease-in-out;
        }
        .slideshow-image.active {
            opacity: 1;
        }
        #slideshow-container::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 2;
        }

        .login-container {
            background: rgba(0, 0, 0, 0.514);
            backdrop-filter: blur(12px);
            border-radius: 20px;
            padding: 60px;
            text-align: center;
            width: 100%;
            max-width: 500px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            z-index: 3;
            position: relative;
            animation: slideUp 0.8s ease-out;
        }

        @keyframes slideUp {
            from {
                transform: translateY(50px);
                opacity: 0;
            }
            to {
                transform: translateY(0);
                opacity: 1;
            }
        }

        .logo {
            font-size: 64px;
            font-weight: bold;
            color: #81b64c;
            margin-bottom: 20px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
            letter-spacing: 3px;
        }

        .subtitle {
            font-size: 20px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 60px;
            line-height: 1.4;
        }

        .welcome-text {
            font-size: 28px;
            font-weight: 600;
            color: white;
            margin-bottom: 15px;
        }

        .welcome-subtitle {
            font-size: 18px;
            color: #b8b5b2;
            margin-bottom: 50px;
            line-height: 1.5;
        }

        .google-login-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 18px;
            padding: 20px 35px;
            background: linear-gradient(135deg, #4285f4, #3367d6);
            border: none;
            border-radius: 12px;
            color: white;
            font-size: 18px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            box-shadow: 0 4px 15px rgba(66, 133, 244, 0.3);
            position: relative;
            overflow: hidden;
            width: 100%;
        }

        .google-login-btn:hover {
            background: linear-gradient(135deg, #3367d6, #2451b3);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(66, 133, 244, 0.4);
        }

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

        .google-login-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: left 0.6s;
        }

        .google-login-btn:hover::before {
            left: 100%;
        }

        .google-icon {
            width: 28px;
            height: 28px;
            background: white;
            border-radius: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: #4285f4;
            font-weight: bold;
        }

        .footer-text {
            margin-top: 40px;
            padding-top: 25px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #888;
            font-size: 14px;
            line-height: 1.5;
        }

        .loading-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.8);
            display: none;
            align-items: center;
            justify-content: center;
            z-index: 1000;
            backdrop-filter: blur(5px);
        }

        .loading-overlay.show {
            display: flex;
        }

        .loading-content {
            background: #262421;
            padding: 40px;
            border-radius: 12px;
            text-align: center;
            border: 2px solid #81b64c;
            max-width: 300px;
            width: 90%;
        }

        .spinner {
            width: 50px;
            height: 50px;
            border: 4px solid #404040;
            border-top: 4px solid #81b64c;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin: 0 auto 20px;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        .loading-text {
            color: white;
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .loading-subtitle {
            color: #b8b5b2;
            font-size: 14px;
        }

        /* Tablets */
        @media (max-width: 768px) and (min-width: 481px) {
            .login-container {
                padding: 50px 40px;
                max-width: 450px;
            }

            .logo {
                font-size: 56px;
                margin-bottom: 18px;
            }

            .subtitle {
                font-size: 18px;
                margin-bottom: 50px;
            }

            .welcome-text {
                font-size: 26px;
            }

            .welcome-subtitle {
                font-size: 17px;
                margin-bottom: 45px;
            }

            .google-login-btn {
                padding: 18px 30px;
                font-size: 17px;
                gap: 16px;
            }

            .google-icon {
                width: 26px;
                height: 26px;
                font-size: 19px;
            }

            .footer-text {
                font-size: 13px;
                margin-top: 35px;
                padding-top: 20px;
            }
        }

        /* Mobile */
        @media (max-width: 480px) {
            body {
                padding: 15px;
            }

            .login-container {
                padding: 40px 30px;
                max-width: none;
                width: 100%;
                border-radius: 16px;
            }

            .logo {
                font-size: 48px;
                margin-bottom: 15px;
                letter-spacing: 2px;
            }

            .subtitle {
                font-size: 16px;
                margin-bottom: 40px;
            }

            .welcome-text {
                font-size: 24px;
                margin-bottom: 12px;
            }

            .welcome-subtitle {
                font-size: 15px;
                margin-bottom: 40px;
            }

            .google-login-btn {
                padding: 16px 25px;
                font-size: 16px;
                gap: 14px;
            }

            .google-icon {
                width: 24px;
                height: 24px;
                font-size: 18px;
            }

            .footer-text {
                font-size: 12px;
                margin-top: 30px;
                padding-top: 18px;
            }

            .loading-content {
                padding: 30px 25px;
                margin: 15px;
            }

            .loading-text {
                font-size: 16px;
            }

            .loading-subtitle {
                font-size: 13px;
            }
        }

        /* Extra small mobile */
        @media (max-width: 320px) {
            .login-container {
                padding: 30px 20px;
            }

            .logo {
                font-size: 42px;
            }

            .welcome-text {
                font-size: 22px;
            }

            .google-login-btn {
                padding: 14px 20px;
                font-size: 15px;
                gap: 12px;
            }
        }

        /* Desktop large */
        @media (min-width: 1200px) {
            .login-container {
                max-width: 550px;
                padding: 70px;
            }

            .logo {
                font-size: 68px;
                margin-bottom: 25px;
            }

            .subtitle {
                font-size: 22px;
                margin-bottom: 70px;
            }

            .welcome-text {
                font-size: 30px;
                margin-bottom: 18px;
            }

            .welcome-subtitle {
                font-size: 19px;
                margin-bottom: 55px;
            }

            .google-login-btn {
                padding: 22px 40px;
                font-size: 19px;
                gap: 20px;
            }

            .google-icon {
                width: 30px;
                height: 30px;
                font-size: 22px;
            }
        }