:root {
    --primary: #4361ee;
    --primary-dark: #3a56d4;
    --secondary: #7209b7;
    --success: #06d6a0;
    --warning: #ffd166;
    --danger: #ef476f;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --light-gray: #e9ecef;
    --border-radius: 12px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
    color: var(--dark);
    min-height: 100vh;
/*    padding: 20px;*/
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.header {
    text-align: center;
    margin-bottom: 40px;
    border-radius: 10px;
    padding: 10px;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header p {
    color: var(--gray);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 30px;
    margin-bottom: 30px;
    transition: var(--transition);
}

.card:hover {
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.12);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-title i {
    color: var(--primary);
}

.upload-area {
    border: 2px dashed var(--light-gray);
    border-radius: var(--border-radius);
    padding: 60px 20px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 20px;
    background-color: #fafbfc;
}

.upload-area:hover, .upload-area.dragover {
    border-color: var(--primary);
    background-color: rgba(67, 97, 238, 0.05);
}

.upload-icon {
    font-size: 3.5rem;
    color: var(--primary);
    margin-bottom: 15px;
}

.upload-text {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.upload-subtext {
    color: var(--gray);
    margin-bottom: 20px;
}

.btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    font-size: 1rem;
}

.btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--light-gray);
    color: var(--dark);
}

.btn-secondary:hover {
    background: #dee2e6;
}

.btn-success {
    background: var(--success);
}

.btn-success:hover {
    background: #05c290;
}

.btn-danger {
    background: var(--danger);
}

.btn-danger:hover {
    background: #e63946;
}

.btn:disabled {
    background: var(--light-gray);
    color: var(--gray);
    cursor: not-allowed;
    transform: none;
}

.file-input {
    display: none;
}

.settings {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
    box-shadow: rgba(100, 100, 111, 0.2) 0px 7px 29px 0px;
    padding: 10px;
    margin: 10px;
    border-radius: 10px;
    width: 40%;
}

.setting-label {
    font-weight: 600;
    display: flex;
    justify-content: between;
    align-items: center;
}

.setting-label span {
    font-weight: normal;
    color: var(--gray);
    font-size: 0.9rem;
}

.range-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.range-value {
    font-weight: 600;
    min-width: 50px;
    text-align: center;
}

input[type="range"] {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: var(--light-gray);
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
}

select, input[type="number"] {
    padding: 12px;
    border-radius: 8px;
    border: 1px solid var(--light-gray);
    font-size: 1rem;
    transition: var(--transition);
}

select:focus, input[type="number"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

.dimension-inputs {
    display: flex;
    gap: 10px;
}

.dimension-inputs input {
    flex: 1;
}

.preview-section {
    display: none;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.file-count {
    color: var(--gray);
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.preview-card {
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
}

.preview-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.preview-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-bottom: 1px solid var(--light-gray);
}

.preview-info {
    padding: 15px;
}

.preview-name {
    font-weight: 600;
    margin-bottom: 10px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.preview-stats {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.preview-original {
    color: var(--gray);
}

.preview-compressed {
    color: var(--success);
    font-weight: 600;
}

.preview-actions {
    display: flex;
    gap: 10px;
}

.preview-actions .btn {
    flex: 1;
    justify-content: center;
    padding: 8px 12px;
    font-size: 0.9rem;
}

.summary {
    display: flex;
    justify-content: space-between;
    background: var(--light);
    padding: 20px;
    border-radius: var(--border-radius);
    margin-top: 30px;
}

.summary-item {
    text-align: center;
}

.summary-value {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 5px;
}

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

.savings {
    color: var(--success);
}

.progress-container {
    margin: 30px 0;
    display: none;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.progress-bar {
    height: 10px;
    background: var(--light-gray);
    border-radius: 5px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 5px;
    width: 0%;
    transition: width 0.5s ease;
}

.actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
}

.alert {
    padding: 15px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    display: none;
}

.alert-warning {
    background: rgba(255, 209, 102, 0.2);
    border-left: 4px solid var(--warning);
    color: #856404;
}

.alert-success {
    background: rgba(6, 214, 160, 0.2);
    border-left: 4px solid var(--success);
    color: #155724;
}

.file-list {
    margin-top: 10px;
    font-size: 0.9rem;
}

.upload-summary {
    display: none;
    margin-bottom: 20px;
    padding: 15px;
    background: rgba(6, 214, 160, 0.1);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--success);
}

.download-animation {
    display: none;
    text-align: center;
    margin: 30px 0;
    padding: 20px;
    background: rgba(6, 214, 160, 0.1);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--success);
}

.download-icon {
    font-size: 3rem;
    color: var(--success);
    margin-bottom: 15px;
    animation: bounce 1s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.size-input-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.size-input {
    flex: 1;
}

.size-unit {
    color: var(--gray);
    min-width: 30px;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .container {
        max-width: 95%;
    }
}

@media (max-width: 992px) {
    .preview-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }

    .header h1 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .settings {
        grid-template-columns: 1fr;
    }

    .preview-grid {
        grid-template-columns: 1fr;
    }

    .summary {
        flex-direction: column;
        gap: 20px;
    }

    .actions {
        flex-direction: column;
    }

    .dimension-inputs {
        flex-direction: column;
    }

    .header h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 20px;
    }
}

@media (max-width: 576px) {

    .settings{
        flex-direction: column;
    }
    .setting-group{
        width:90%;
    }
    body {
        padding: 10px;
    }

    .header h1 {
        font-size: 1.6rem;
    }

    .upload-area {
        padding: 40px 15px;
    }

    .upload-icon {
        font-size: 2.5rem;
    }

    .preview-actions {
        flex-direction: column;
    }

    .preview-stats {
        flex-direction: column;
        gap: 5px;
    }
}

@media (max-width: 400px) {
    .header h1 {
        font-size: 1.4rem;
    }

    .upload-text {
        font-size: 1rem;
    }

    .btn {
        padding: 10px 16px;
        font-size: 0.9rem;
    }
}