:root {
    --primary-color: #007AFF;
    --secondary-color: #5856D6;
    --background-color: #F2F2F7;
    --card-background: #FFFFFF;
    --text-color: #1C1C1E;
    --border-color: #E5E5EA;
    --border-radius: 12px;
    --spacing: 20px;
}

[data-theme="dark"] {
    --background-color: #1C1C1E;
    --card-background: #2C2C2E;
    --text-color: #FFFFFF;
    --border-color: #3A3A3C;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.5;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.theme-switch {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    background-color: var(--card-background);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.theme-toggle svg {
    fill: var(--text-color);
}

.sun-icon {
    display: none;
}

[data-theme="dark"] .sun-icon {
    display: block;
}

[data-theme="dark"] .moon-icon {
    display: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing);
}

header {
    text-align: center;
    margin-bottom: 40px;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: #666;
    font-size: 1.1rem;
}

.upload-container {
    margin-bottom: var(--spacing);
}

.upload-area {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    border: 2px dashed #E5E5EA;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: #F8F8F8;
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.upload-icon {
    fill: var(--primary-color);
}

.upload-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 20px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-button:hover {
    background-color: #0066CC;
    transform: translateY(-1px);
}

.comparison-container {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--spacing);
    margin-top: 40px;
}

.image-card {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    padding: var(--spacing);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.image-preview {
    width: 100%;
    height: 300px;
    border-radius: 8px;
    overflow: hidden;
    margin: 16px 0;
    background-color: #F8F8F8;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-preview img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.compression-controls {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 20px;
    padding: 20px;
}

.quality-control {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

input[type="range"] {
    width: 200px;
    -webkit-appearance: none;
    height: 4px;
    background: #E5E5EA;
    border-radius: 2px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.primary-button, .secondary-button {
    padding: 12px 24px;
    border-radius: 20px;
    border: none;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.primary-button {
    background-color: var(--primary-color);
    color: white;
}

.primary-button:hover {
    background-color: #0066CC;
    transform: translateY(-1px);
}

.secondary-button {
    background-color: #E5E5EA;
    color: var(--text-color);
}

.secondary-button:hover {
    background-color: #D1D1D6;
}

.secondary-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.image-info {
    margin-top: 16px;
    text-align: center;
}

footer {
    text-align: center;
    margin-top: 40px;
    color: #666;
}

.advanced-settings {
    margin: 20px 0;
}

.settings-toggle {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    font-size: 1rem;
    padding: 8px 16px;
    border-radius: var(--border-radius);
    transition: background-color 0.3s ease;
}

.settings-toggle:hover {
    background-color: rgba(0, 122, 255, 0.1);
}

.settings-panel {
    display: none;
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-top: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.settings-panel.active {
    display: block;
}

.settings-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.settings-group label {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.settings-group input {
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--card-background);
    color: var(--text-color);
}

.batch-container {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    padding: 20px;
    margin: 20px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.batch-list {
    margin: 20px 0;
    display: grid;
    gap: 10px;
}

.batch-item {
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    align-items: center;
    gap: 20px;
    padding: 10px;
    background-color: var(--background-color);
    border-radius: 8px;
}

.batch-item img {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: 4px;
}

.batch-item-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.batch-item-name {
    font-weight: 500;
}

.batch-item-size {
    font-size: 0.9rem;
    color: #666;
}

.compression-ratio {
    margin-top: 8px;
    font-weight: 500;
    color: var(--primary-color);
}

.upload-hint {
    font-size: 0.9rem;
    color: #666;
}

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

    .compression-controls {
        order: -1;
    }

    .settings-group {
        grid-template-columns: 1fr;
    }

    .batch-item {
        grid-template-columns: auto 1fr;
        gap: 10px;
    }

    .batch-item-actions {
        grid-column: 1 / -1;
        display: flex;
        justify-content: flex-end;
        gap: 10px;
    }
}

.mode-switch {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
}

.mode-button {
    padding: 8px 20px;
    border: none;
    border-radius: 20px;
    background-color: var(--card-background);
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.mode-button.active {
    background-color: var(--primary-color);
    color: white;
}

.upload-buttons {
    display: flex;
    gap: 10px;
}

.upload-button-secondary {
    background-color: var(--card-background);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 12px 24px;
    border-radius: 20px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-button-secondary:hover {
    background-color: var(--border-color);
}

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

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

.batch-actions button {
    display: flex;
    align-items: center;
    gap: 8px;
}

.batch-actions svg {
    fill: currentColor;
}

.batch-progress {
    margin: 20px 0;
    padding: 15px;
    background-color: var(--card-background);
    border-radius: var(--border-radius);
}

.progress-bar {
    height: 6px;
    background-color: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background-color: var(--primary-color);
    width: 0;
    transition: width 0.3s ease;
}

.progress-text {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-color);
}

.batch-item {
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    align-items: center;
    gap: 20px;
    padding: 15px;
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    margin-bottom: 10px;
    transition: transform 0.3s ease;
}

.batch-item:hover {
    transform: translateY(-2px);
}

.batch-item img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 8px;
}

.batch-item-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.batch-item-name {
    font-weight: 500;
    color: var(--text-color);
}

.batch-item-size {
    font-size: 0.9rem;
    color: #666;
}

.batch-item-compressed-size {
    color: var(--primary-color);
    font-weight: 500;
}

.batch-item-status {
    font-size: 0.9rem;
    padding: 4px 8px;
    border-radius: 12px;
    background-color: var(--border-color);
}

.batch-item-status.success {
    background-color: #34C759;
    color: white;
}

.batch-item-status.error {
    background-color: #FF3B30;
    color: white;
}

.settings-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
}

.settings-toggle svg {
    fill: var(--primary-color);
}

@media (max-width: 768px) {
    .batch-header {
        flex-direction: column;
        gap: 15px;
    }

    .batch-actions {
        width: 100%;
    }

    .batch-actions button {
        flex: 1;
    }

    .batch-item {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 20px;
    }

    .batch-item img {
        margin: 0 auto;
    }
}

.batch-quality-control {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 15px;
    background-color: var(--card-background);
    border-radius: 20px;
    height: 40px;
}

.batch-quality-control label {
    font-size: 0.9rem;
    color: var(--text-color);
    white-space: nowrap;
}

.batch-quality-control input[type="range"] {
    width: 120px;
    -webkit-appearance: none;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    outline: none;
}

.batch-quality-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.batch-quality-control input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.batch-quality-control span {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 500;
    min-width: 45px;
}

@media (max-width: 768px) {
    .batch-actions {
        flex-direction: column;
        gap: 15px;
    }

    .batch-quality-control {
        width: 100%;
        justify-content: center;
    }

    .batch-quality-control input[type="range"] {
        width: 150px;
    }
}

.upload-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
}

.tab-button {
    padding: 8px 20px;
    border: none;
    border-radius: 20px;
    background-color: var(--card-background);
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.tab-button.active {
    background-color: var(--primary-color);
    color: white;
}

.url-input-area {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    padding: var(--spacing);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.url-input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.url-input-group input {
    flex: 1;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: all 0.3s ease;
}

.url-input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 122, 255, 0.1);
}

.url-input-group button {
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.url-input-group button svg {
    fill: currentColor;
}

.url-preview {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
    margin: 15px 0;
    min-height: 100px;
}

.url-preview-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: 8px;
    overflow: hidden;
    background-color: var(--background-color);
}

.url-preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.url-preview-item:hover img {
    transform: scale(1.05);
}

.url-preview-item .remove-button {
    position: absolute;
    top: 5px;
    right: 5px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.url-preview-item:hover .remove-button {
    opacity: 1;
}

.url-preview-item .remove-button:hover {
    background-color: rgba(255, 59, 48, 0.8);
}

.url-hints {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.url-hints p {
    color: #666;
    font-size: 0.9rem;
    margin: 5px 0;
}

.url-error {
    color: #FF3B30;
    font-size: 0.9rem;
    margin-top: 10px;
}

@media (max-width: 768px) {
    .url-input-group {
        flex-direction: column;
    }

    .url-input-group button {
        width: 100%;
        justify-content: center;
    }

    .url-preview {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 20px;
}

.size-control, .batch-size-control {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    padding: 15px;
}

.size-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 10px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.input-group label {
    font-size: 0.9rem;
    color: var(--text-color);
}

.number-input {
    display: flex;
    align-items: center;
    gap: 5px;
}

.number-input input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: all 0.3s ease;
}

.number-input input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 122, 255, 0.1);
}

.number-input span {
    color: #666;
    font-size: 0.9rem;
    white-space: nowrap;
}

.size-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 10px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    appearance: none;
    -webkit-appearance: none;
    outline: none;
    cursor: pointer;
    position: relative;
    background-color: var(--background-color);
}

.checkbox-label input[type="checkbox"]:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-label input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 2px;
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-label span {
    font-size: 0.9rem;
    color: var(--text-color);
}

.text-button {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 0.9rem;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.text-button:hover {
    background-color: rgba(0, 122, 255, 0.1);
}

.batch-controls {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 15px;
}

.batch-buttons {
    display: flex;
    gap: 10px;
}

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

    .size-options {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .batch-buttons {
        flex-direction: column;
    }
}