* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        :root {
            --primary: #3182ce;
            --primary-dark: #2c5282;
            --secondary: #e53e3e;
            --success: #38a169;
            --warning: #d69e2e;
            --gray-100: #f7fafc;
            --gray-200: #edf2f7;
            --gray-300: #e2e8f0;
            --gray-600: #718096;
            --gray-800: #2d3748;
        }

        body {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: var(--gray-800);
            min-height: 100vh;
            padding: 20px;
        }

        .app-container {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        @media (max-width: 900px) {
            .app-container {
                grid-template-columns: 1fr;
            }
        }

        .panel {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            padding: 30px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        }

        .header {
            grid-column: 1 / -1;
            text-align: center;
            padding: 20px;
            margin-bottom: 20px;
        }

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

        .logo {
            width: 60px;
            height: 60px;
        }

        h1 {
            font-size: 2.8rem;
            color: white;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
            margin-bottom: 10px;
        }

        .subtitle {
            color: rgba(255, 255, 255, 0.9);
            font-size: 1.2rem;
            max-width: 600px;
            margin: 0 auto;
        }

        h2 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            color: var(--primary);
            padding-bottom: 10px;
            border-bottom: 2px solid var(--gray-300);
        }

        h3 {
            font-size: 1.4rem;
            margin: 15px 0;
            color: var(--primary-dark);
        }

        .upload-area {
            border: 3px dashed var(--gray-300);
            border-radius: 15px;
            padding: 40px 20px;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-bottom: 25px;
            background: var(--gray-100);
        }

        .upload-area:hover {
            border-color: var(--primary);
            background: rgba(49, 130, 206, 0.05);
        }

        .upload-area.dragover {
            border-color: var(--primary);
            background: rgba(49, 130, 206, 0.1);
            transform: scale(1.02);
        }

        .upload-icon {
            width: 80px;
            height: 80px;
            margin: 0 auto 20px;
        }

        .upload-text {
            font-size: 1.3rem;
            color: var(--gray-800);
            margin-bottom: 10px;
            font-weight: 600;
        }

        .upload-subtext {
            color: var(--gray-600);
            font-size: 1rem;
        }

        .file-input {
            display: none;
        }

        .compression-options {
            background: var(--gray-100);
            padding: 20px;
            border-radius: 12px;
            margin-bottom: 25px;
        }

        .option-group {
            margin-bottom: 20px;
        }

        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--gray-800);
        }

        select, input[type="range"] {
            width: 100%;
            padding: 12px;
            border: 2px solid var(--gray-300);
            border-radius: 8px;
            font-size: 16px;
            transition: border-color 0.3s ease;
            background: white;
        }

        select:focus, input[type="range"]:focus {
            outline: none;
            border-color: var(--primary);
        }

        .range-container {
            position: relative;
            margin-top: 10px;
        }

        .range-value {
            position: absolute;
            top: -30px;
            right: 0;
            background: var(--primary);
            color: white;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
        }

        .processing-option {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 15px;
        }

        .toggle-switch {
            position: relative;
            display: inline-block;
            width: 60px;
            height: 30px;
        }

        .toggle-switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }

        .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: var(--gray-300);
            transition: .4s;
            border-radius: 34px;
        }

        .slider:before {
            position: absolute;
            content: "";
            height: 22px;
            width: 22px;
            left: 4px;
            bottom: 4px;
            background-color: white;
            transition: .4s;
            border-radius: 50%;
        }

        input:checked + .slider {
            background-color: var(--primary);
        }

        input:checked + .slider:before {
            transform: translateX(30px);
        }

        .btn {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: white;
            border: none;
            padding: 16px 32px;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: block;
            width: 100%;
            margin: 20px 0;
        }

        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(49, 130, 206, 0.3);
        }

        .btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        .btn-secondary {
            background: linear-gradient(135deg, var(--gray-600), var(--gray-800));
        }

        .btn-success {
            background: linear-gradient(135deg, var(--success), #2f855a);
        }

        .file-info {
            background: white;
            padding: 20px;
            border-radius: 12px;
            margin: 20px 0;
            border-left: 4px solid var(--primary);
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .file-icon {
            width: 40px;
            height: 40px;
            flex-shrink: 0;
        }

        .file-details {
            flex-grow: 1;
        }

        .file-name {
            font-weight: 600;
            color: var(--gray-800);
            margin-bottom: 5px;
            font-size: 1.1rem;
        }

        .file-size {
            color: var(--gray-600);
            font-size: 0.9rem;
        }

        .progress-container {
            margin: 25px 0;
        }

        .progress-label {
            display: flex;
            justify-content: space-between;
            margin-bottom: 8px;
            font-weight: 600;
        }

        .progress {
            width: 100%;
            height: 12px;
            background: var(--gray-300);
            border-radius: 10px;
            overflow: hidden;
        }

        .progress-bar {
            height: 100%;
            background: linear-gradient(90deg, var(--primary), var(--primary-dark));
            width: 0%;
            transition: width 0.5s ease;
            border-radius: 10px;
        }

        .results {
            margin-top: 30px;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
            margin: 20px 0;
        }

        .stat-card {
            background: var(--gray-100);
            padding: 20px;
            border-radius: 12px;
            text-align: center;
            border: 1px solid var(--gray-300);
        }

        .stat-value {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .stat-label {
            color: var(--gray-600);
            font-size: 0.9rem;
        }

        .comparison {
            display: flex;
            justify-content: space-between;
            margin: 30px 0;
            gap: 20px;
        }

        .file-comparison {
            flex: 1;
            text-align: center;
            padding: 20px;
            background: var(--gray-100);
            border-radius: 12px;
        }

        .comparison-bar {
            height: 30px;
            background: linear-gradient(90deg, var(--primary), var(--primary-dark));
            border-radius: 6px;
            margin: 15px 0;
            position: relative;
        }

        .comparison-bar-original {
            background: linear-gradient(90deg, var(--gray-600), var(--gray-800));
        }

        .server-info {
            background: #fff4e6;
            border-left: 4px solid #ff922b;
            padding: 15px;
            border-radius: 8px;
            margin: 20px 0;
            font-size: 0.9rem;
        }

        .feature-list {
            margin: 20px 0;
            padding-left: 20px;
        }

        .feature-list li {
            margin-bottom: 10px;
            line-height: 1.5;
        }

        .notification {
            position: fixed;
            top: 20px;
            right: 20px;
            padding: 15px 20px;
            border-radius: 8px;
            background: white;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
            display: flex;
            align-items: center;
            gap: 10px;
            transform: translateX(100%);
            transition: transform 0.3s ease;
            z-index: 1000;
        }

        .notification.show {
            transform: translateX(0);
        }

        .notification-success {
            border-left: 4px solid var(--success);
        }

        .notification-error {
            border-left: 4px solid var(--secondary);
        }

        .notification-icon {
            width: 24px;
            height: 24px;
        }

        footer {
            grid-column: 1 / -1;
            text-align: center;
            color: white;
            margin-top: 40px;
            padding: 20px;
            opacity: 0.9;
        }

        /* Animation for processing */
        @keyframes pulse {
            0% { opacity: 1; }
            50% { opacity: 0.5; }
            100% { opacity: 1; }
        }

        .processing {
            animation: pulse 1.5s infinite;
        }
    


/* Social Sharing Styles */
.social-sharing {
    margin: 20px 0;
    padding: 20px;
    background: var(--gray-100);
    border-radius: 12px;
    text-align: center;
}

.social-sharing h3 {
    margin-bottom: 15px;
    color: var(--primary-dark);
    font-size: 1.2rem;
}

.share-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 16px;
    border: none;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    color: white;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

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

.share-btn-native {
    background: linear-gradient(135deg, #667eea, #764ba2);
}

.share-btn-facebook {
    background: linear-gradient(135deg, #1877f2, #42a5f5);
}

.share-btn-twitter {
    background: linear-gradient(135deg, #1da1f2, #0d8bd9);
}

.share-btn-linkedin {
    background: linear-gradient(135deg, #0077b5, #005885);
}

.share-btn-whatsapp {
    background: linear-gradient(135deg, #25d366, #128c7e);
}

.share-btn-telegram {
    background: linear-gradient(135deg, #0088cc, #006699);
}

.share-btn-reddit {
    background: linear-gradient(135deg, #ff4500, #cc3700);
}

.share-icon {
    width: 18px;
    height: 18px;
    fill: currentColor;
    flex-shrink: 0;
}

.share-stats {
    margin-top: 15px;
    display: flex;
    justify-content: center;
    gap: 20px;
    font-size: 0.9rem;
    color: var(--gray-600);
}

.share-count {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* Toast notification */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    color: var(--gray-800);
    padding: 12px 20px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border-left: 4px solid var(--success);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast.show {
    transform: translateX(0);
}

.toast-success {
    border-left-color: var(--success);
}

.toast-error {
    border-left-color: var(--secondary);
}

/* Animation for successful share */
@keyframes shareSuccess {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.share-btn.shared {
    animation: shareSuccess 0.3s ease;
}

/* Demo section */
.demo-section {
    margin-bottom: 30px;
    padding: 20px;
    background: white;
    border-radius: 12px;
}

.compression-demo {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 15px 0;
    padding: 15px;
    background: var(--gray-100);
    border-radius: 8px;
}

.file-stat {
    text-align: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary);
}

.stat-label {
    color: var(--gray-600);
    font-size: 0.9rem;
}

.arrow {
    font-size: 1.5rem;
    color: var(--success);
}

/* Mobile optimizations */
@media (max-width: 600px) {
    .share-buttons {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .compression-demo {
        flex-direction: column;
        gap: 10px;
    }
    
    .arrow {
        transform: rotate(90deg);
    }
}