/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 50%, #16213e 100%);
    color: #e0e0e0;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部 */
.header {
    text-align: center;
    margin-bottom: 40px;
    position: relative;
}

.title {
    font-size: 4rem;
    font-weight: bold;
    background: linear-gradient(45deg, #00f5ff, #7b4397, #dc2430);
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 3s ease infinite;
    text-shadow: 0 0 20px rgba(0, 245, 255, 0.5);
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.2rem;
    color: #8a9ba8;
    letter-spacing: 2px;
}

/* 主内容 */
.main {
    display: flex;
    justify-content: center;
}

.tool-section {
    width: 100%;
}

.tool-card {
    background: rgba(30, 30, 50, 0.8);
    border-radius: 20px;
    padding: 30px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 245, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), 0 0 20px rgba(0, 245, 255, 0.1);
    transition: all 0.3s ease;
}

.tool-card:hover {
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4), 0 0 30px rgba(0, 245, 255, 0.2);
    transform: translateY(-5px);
}

.tool-title {
    font-size: 2rem;
    margin-bottom: 25px;
    color: #00f5ff;
    text-shadow: 0 0 10px rgba(0, 245, 255, 0.5);
}

/* 上传区域 */
.upload-area {
    margin-bottom: 30px;
}

.dropzone {
    border: 2px dashed rgba(0, 245, 255, 0.5);
    border-radius: 15px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(0, 245, 255, 0.05);
    position: relative;
    overflow: hidden;
}

.dropzone:hover {
    border-color: #00f5ff;
    background: rgba(0, 245, 255, 0.1);
    box-shadow: 0 0 20px rgba(0, 245, 255, 0.2);
}

.dropzone.dragover {
    border-color: #00f5ff;
    background: rgba(0, 245, 255, 0.15);
    transform: scale(1.02);
}

#fileInput {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.dropzone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.upload-icon {
    width: 60px;
    height: 60px;
    color: #00f5ff;
    opacity: 0.8;
    transition: all 0.3s ease;
}

.dropzone:hover .upload-icon {
    transform: scale(1.1);
    opacity: 1;
    filter: drop-shadow(0 0 10px rgba(0, 245, 255, 0.5));
}

.dropzone-content p {
    font-size: 1.1rem;
    color: #8a9ba8;
}

.file-list {
    margin-top: 20px;
    max-height: 200px;
    overflow-y: auto;
    padding: 10px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    border: 1px solid rgba(0, 245, 255, 0.2);
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    margin-bottom: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(0, 245, 255, 0.1);
    transition: all 0.2s ease;
}

.file-item:hover {
    background: rgba(0, 245, 255, 0.1);
    border-color: rgba(0, 245, 255, 0.3);
}

.file-name {
    font-size: 0.9rem;
    color: #e0e0e0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    margin-right: 10px;
}

.file-size {
    font-size: 0.8rem;
    color: #8a9ba8;
    white-space: nowrap;
}

/* 压缩选项 */
.compression-options {
    margin-bottom: 30px;
    padding: 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 15px;
    border: 1px solid rgba(0, 245, 255, 0.2);
}

.compression-options h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: #00f5ff;
}

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

.option-group label {
    display: block;
    margin-bottom: 10px;
    font-size: 1rem;
    color: #e0e0e0;
}

.compression-method-selector {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    gap: 10px;
    -webkit-box-pack: start;
    -ms-flex-pack: start;
    justify-content: flex-start;
}

.compression-method-btn {
    padding: 10px 20px;
    border: 2px solid rgba(0, 245, 255, 0.3);
    background: rgba(0, 245, 255, 0.1);
    color: #00f5ff;
    border-radius: 25px;
    cursor: pointer;
    -webkit-transition: all 0.3s ease;
    -moz-transition: all 0.3s ease;
    -ms-transition: all 0.3s ease;
    -o-transition: all 0.3s ease;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    font-weight: bold;
    position: relative;
    overflow: hidden;
    display: inline-block;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    outline: none;
    text-decoration: none;
    text-align: center;
    /* 确保按钮在所有浏览器中可见 */
    box-sizing: border-box;
}

.compression-method-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: -webkit-linear-gradient(left, transparent, rgba(0, 245, 255, 0.2), transparent);
    background: -moz-linear-gradient(left, transparent, rgba(0, 245, 255, 0.2), transparent);
    background: -ms-linear-gradient(left, transparent, rgba(0, 245, 255, 0.2), transparent);
    background: -o-linear-gradient(left, transparent, rgba(0, 245, 255, 0.2), transparent);
    background: linear-gradient(90deg, transparent, rgba(0, 245, 255, 0.2), transparent);
    -webkit-transition: left 0.5s ease;
    -moz-transition: left 0.5s ease;
    -ms-transition: left 0.5s ease;
    -o-transition: left 0.5s ease;
    transition: left 0.5s ease;
}

.compression-method-btn:hover::before {
    left: 100%;
}

.compression-method-btn:hover {
    border-color: #00f5ff;
    background: rgba(0, 245, 255, 0.2);
    box-shadow: 0 0 15px rgba(0, 245, 255, 0.3);
    -webkit-transform: translateY(-2px);
    -moz-transform: translateY(-2px);
    -ms-transform: translateY(-2px);
    -o-transform: translateY(-2px);
    transform: translateY(-2px);
}

.compression-method-btn.active {
    border-color: #00f5ff;
    background: rgba(0, 245, 255, 0.3);
    box-shadow: 0 0 15px rgba(0, 245, 255, 0.4);
}

.compression-levels {
    display: flex;
    gap: 15px;
}

.compression-btn {
    padding: 10px 20px;
    border: 2px solid rgba(0, 245, 255, 0.3);
    background: rgba(0, 245, 255, 0.1);
    color: #00f5ff;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    font-weight: bold;
    position: relative;
    overflow: hidden;
}

.compression-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 245, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

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

.compression-btn:hover {
    border-color: #00f5ff;
    background: rgba(0, 245, 255, 0.2);
    box-shadow: 0 0 15px rgba(0, 245, 255, 0.3);
    transform: translateY(-2px);
}

.compression-btn.active {
    border-color: #00f5ff;
    background: rgba(0, 245, 255, 0.3);
    box-shadow: 0 0 15px rgba(0, 245, 255, 0.4);
}

/* 滑块样式 */
.slider-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

#compressionSlider {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.2);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

#compressionSlider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #00f5ff;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(0, 245, 255, 0.8);
    transition: all 0.2s ease;
}

#compressionSlider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 15px rgba(0, 245, 255, 1);
}

#compressionSlider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #00f5ff;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(0, 245, 255, 0.8);
    transition: all 0.2s ease;
    border: none;
}

#compressionSlider::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 15px rgba(0, 245, 255, 1);
}

#sliderValue {
    font-size: 1.1rem;
    color: #00f5ff;
    font-weight: bold;
    min-width: 50px;
    text-align: center;
}

/* 文件大小信息 */
.size-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 30px;
    padding: 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 15px;
    border: 1px solid rgba(0, 245, 255, 0.2);
}

.info-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.info-label {
    font-size: 0.9rem;
    color: #8a9ba8;
    margin-bottom: 5px;
}

#currentSize, #expectedSize {
    font-size: 1.5rem;
    color: #00f5ff;
    font-weight: bold;
    text-shadow: 0 0 10px rgba(0, 245, 255, 0.5);
}

/* 按钮样式 */
.compress-btn, .download-btn {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 25px;
    background: linear-gradient(45deg, #00f5ff, #7b4397);
    color: white;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 245, 255, 0.3);
}

.compress-btn::before, .download-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.compress-btn:hover::before, .download-btn:hover::before {
    left: 100%;
}

.compress-btn:hover, .download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 245, 255, 0.5);
}

.compress-btn:active, .download-btn:active {
    transform: translateY(0);
}

.control-btn {
    padding: 10px 20px;
    border: 2px solid rgba(0, 245, 255, 0.3);
    background: rgba(0, 245, 255, 0.1);
    color: #00f5ff;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    margin-right: 10px;
}

.control-btn:hover {
    border-color: #00f5ff;
    background: rgba(0, 245, 255, 0.2);
    box-shadow: 0 0 15px rgba(0, 245, 255, 0.3);
}

/* 进度条 */
.progress {
    height: 8px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    margin-bottom: 20px;
    overflow: hidden;
    display: none;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #00f5ff, #7b4397);
    border-radius: 4px;
    width: 0%;
    transition: width 0.3s ease;
    box-shadow: 0 0 10px rgba(0, 245, 255, 0.5);
}

/* 预览区域 */
.preview-section {
    margin-top: 30px;
    display: none;
}

.preview-section h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: #00f5ff;
}

.preview-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
    max-height: 400px;
    overflow-y: auto;
    padding: 10px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    border: 1px solid rgba(0, 245, 255, 0.2);
}

.preview-item {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    border: 2px solid rgba(0, 245, 255, 0.3);
    transition: all 0.3s ease;
    background: rgba(0, 0, 0, 0.5);
}

.preview-item:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(0, 245, 255, 0.4);
}

.preview-item.selected {
    border-color: #00f5ff;
    box-shadow: 0 0 20px rgba(0, 245, 255, 0.6);
}

.preview-item img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    display: block;
}

.preview-checkbox {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: #00f5ff;
}

.preview-size {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.7);
    color: #e0e0e0;
    padding: 5px;
    font-size: 0.8rem;
    text-align: center;
}

.download-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

/* 动画 */
@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .title {
        font-size: 2.5rem;
    }
    
    .tool-card {
        padding: 20px;
    }
    
    .compression-levels {
        flex-direction: column;
        align-items: stretch;
    }
    
    .compression-btn {
        width: 100%;
    }
    
    .size-info {
        flex-direction: column;
        gap: 15px;
    }
    
    .download-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .control-btn {
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 245, 255, 0.5);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 245, 255, 0.7);
}