/* 全局样式 */
:root {
    --primary-color: #007AFF;
    --background-color: #F5F5F7;
    --text-color: #1D1D1F;
    --border-color: #D2D2D7;
    --hover-color: #0066CC;
    --card-background: #FFFFFF;
    --shadow-color: rgba(0, 0, 0, 0.05);
}

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

body {
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.5;
    min-height: 100vh;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
}

/* 头部样式 */
header {
    text-align: center;
    margin-bottom: 4rem;
    padding: 2rem 0;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #007AFF, #5856D6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: #86868B;
    font-size: 1.2rem;
}

/* 上传区域样式 */
.upload-section {
    margin-bottom: 2rem;
}

.upload-area {
    background-color: var(--card-background);
    border: 2px dashed var(--border-color);
    border-radius: 16px;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px var(--shadow-color);
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: #F8F8F8;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px var(--shadow-color);
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.upload-icon {
    fill: var(--primary-color);
    transition: transform 0.3s ease;
}

.upload-area:hover .upload-icon {
    transform: scale(1.1);
}

.upload-hint {
    color: #86868B;
    font-size: 0.9rem;
}

/* 压缩控制区域 */
.compression-controls {
    background-color: var(--card-background);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 6px var(--shadow-color);
}

.quality-control {
    margin-bottom: 2rem;
}

.quality-control label {
    display: block;
    margin-bottom: 1rem;
    font-weight: 500;
    color: var(--text-color);
}

input[type="range"] {
    width: 100%;
    margin: 1rem 0;
    -webkit-appearance: none;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px var(--shadow-color);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 8px var(--shadow-color);
}

/* 预览区域 */
.preview-section {
    background-color: var(--card-background);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 4px 6px var(--shadow-color);
}

.preview-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.preview-box {
    text-align: center;
}

.preview-box h3 {
    margin-bottom: 1.5rem;
    font-weight: 500;
    color: var(--text-color);
}

.image-container {
    background-color: var(--background-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: inset 0 2px 4px var(--shadow-color);
}

.image-container img {
    max-width: 100%;
    max-height: 300px;
    object-fit: contain;
    border-radius: 8px;
}

.file-info {
    color: #86868B;
    font-size: 0.9rem;
    padding: 0.5rem;
    background-color: var(--background-color);
    border-radius: 8px;
    display: inline-block;
}

/* 按钮样式 */
.primary-button {
    background: linear-gradient(135deg, #007AFF, #5856D6);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    box-shadow: 0 4px 6px var(--shadow-color);
}

.primary-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px var(--shadow-color);
}

.primary-button:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px var(--shadow-color);
}

/* 页脚样式 */
footer {
    text-align: center;
    margin-top: 4rem;
    padding: 2rem 0;
    color: #86868B;
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    header {
        margin-bottom: 2rem;
        padding: 1rem 0;
    }

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

    .upload-area {
        padding: 2rem;
    }

    .compression-controls,
    .preview-section {
        padding: 1.5rem;
    }
}

/* 常用工具区域整体布局 */
.tools-section {
    margin: 32px 0;
    padding: 24px;
    background: #f8f9fa;
    border-radius: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.tools-section h2 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: #333;
}

.tools-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    overflow-x: auto;
    padding-bottom: 8px;
    scrollbar-width: thin;
}

.tools-buttons::-webkit-scrollbar {
    height: 6px;
    background: #f0f0f0;
}

.tools-buttons::-webkit-scrollbar-thumb {
    background: #d2d2d7;
    border-radius: 3px;
}

.tool-btn {
    padding: 10px 24px;
    font-size: 1rem;
    border: none;
    border-radius: 8px;
    background: #e0e7ef;
    color: #222;
    cursor: pointer;
    transition: background 0.2s;
    white-space: nowrap;
    min-width: 110px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.tool-btn:hover {
    background: #c9d6e6;
}

/* 工具卡片样式 */
.tool-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
    padding: 20px;
    margin-bottom: 20px;
}

/* 计算器样式 */
.calc-display {
    width: 100%;
    height: 48px;
    background: #222;
    color: #fff;
    font-size: 1.5rem;
    text-align: right;
    border-radius: 8px;
    padding: 8px 12px;
    margin-bottom: 12px;
    letter-spacing: 2px;
}
.calc-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}
.calc-btn {
    padding: 12px 0;
    font-size: 1.1rem;
    border: none;
    border-radius: 6px;
    background: #e6eaf0;
    color: #222;
    cursor: pointer;
    transition: background 0.2s;
}
.calc-btn:hover {
    background: #bcd0e6;
}

/* 单位换算器样式 */
.convert-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}
#convertInput, #convertResult {
    width: 100px;
    padding: 6px;
    border-radius: 6px;
    border: 1px solid #ccc;
    font-size: 1rem;
}
#convertType, #convertFrom, #convertTo {
    padding: 6px;
    border-radius: 6px;
    border: 1px solid #ccc;
    font-size: 1rem;
}

/* 记事本样式 */
#noteArea {
    width: 100%;
    min-height: 100px;
    border-radius: 8px;
    border: 1px solid #ccc;
    padding: 10px;
    font-size: 1rem;
    margin-bottom: 12px;
    resize: vertical;
}
.note-actions {
    display: flex;
    gap: 12px;
}
.note-actions button {
    padding: 8px 18px;
    border-radius: 6px;
    border: none;
    background: #e0e7ef;
    color: #222;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.2s;
}
.note-actions button:hover {
    background: #c9d6e6;
}

/* 计时器样式 */
.timer-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}
.timer-display {
    font-size: 2rem;
    text-align: center;
    margin-top: 8px;
    color: #007AFF;
    letter-spacing: 2px;
}

/* 秒表样式 */
.stopwatch-display {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 12px;
    color: #007AFF;
    letter-spacing: 2px;
}
.stopwatch-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

/* 日历样式 */
.calendar-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    justify-content: center;
    margin-bottom: 12px;
}
.calendar-table {
    width: 100%;
    border-collapse: collapse;
    text-align: center;
}
.calendar-table th, .calendar-table td {
    padding: 6px;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s;
}
.calendar-table th {
    color: #86868B;
}
.calendar-table td.selected {
    background: #007AFF;
    color: #fff;
}
.calendar-table td:hover {
    background: #e0e7ef;
}

/* 随机数生成器样式 */
.random-result {
    margin-top: 10px;
    font-size: 1.2rem;
    color: #007AFF;
}

/* 待办清单样式 */
.todo-input-row {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}
.todo-list {
    list-style: none;
    padding: 0;
}
.todo-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 0;
    border-bottom: 1px solid #eee;
}
.todo-list li.completed span {
    text-decoration: line-through;
    color: #86868B;
}
.todo-list button {
    background: #e0e7ef;
    border: none;
    border-radius: 4px;
    padding: 2px 8px;
    cursor: pointer;
    color: #222;
    font-size: 0.9rem;
}
.todo-list button:hover {
    background: #c9d6e6;
}

/* 货币换算器样式 */
.currency-result {
    margin-top: 10px;
    font-size: 1.2rem;
    color: #007AFF;
}

/* 英文单词翻译样式 */
.translate-result {
    margin-top: 10px;
    font-size: 1.1rem;
    color: #007AFF;
}