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

/* 苹果风格设计变量 */
:root {
    /* 苹果色彩系统 */
    --color-blue: #007AFF;
    --color-blue-light: #5AC8FA;
    --color-green: #34C759;
    --color-orange: #FF9500;
    --color-red: #FF3B30;
    --color-purple: #AF52DE;
    --color-pink: #FF2D92;
    --color-indigo: #5856D6;

    /* 中性色 */
    --color-gray-1: #8E8E93;
    --color-gray-2: #AEAEB2;
    --color-gray-3: #C7C7CC;
    --color-gray-4: #D1D1D6;
    --color-gray-5: #E5E5EA;
    --color-gray-6: #F2F2F7;

    /* 文字颜色 */
    --text-primary: #000000;
    --text-secondary: #3C3C43;
    --text-tertiary: #3C3C4399;
    --text-quaternary: #3C3C434D;
    --text-white: #FFFFFF;

    /* 背景颜色 */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F2F2F7;
    --bg-tertiary: #FFFFFF;
    --bg-grouped: #F2F2F7;

    /* 系统颜色 */
    --fill-primary: #78788033;
    --fill-secondary: #78788028;
    --fill-tertiary: #7676801E;
    --fill-quaternary: #74748014;

    /* 分隔线 */
    --separator: #3C3C4349;
    --separator-opaque: #C6C6C8;

    /* 圆角 */
    --radius-small: 6px;
    --radius-medium: 10px;
    --radius-large: 12px;
    --radius-xl: 16px;
    --radius-xxl: 20px;

    /* 阴影 */
    --shadow-1: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-2: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-3: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-4: 0 20px 25px rgba(0, 0, 0, 0.1);

    /* 动画 */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.2s ease-out;
    --transition-slow: 0.3s ease-out;
    --spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* 苹果风格基础样式 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background: var(--bg-secondary);
    min-height: 100vh;
    padding: 20px;
    color: var(--text-primary);
    line-height: 1.47059;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-display: swap;
}

/* 移除复杂的背景装饰 */
.background-decoration {
    display: none;
}

.floating-shape {
    display: none;
}

/* 苹果风格主容器 */
.container {
    max-width: 980px;
    margin: 0 auto;
    background: var(--bg-primary);
    border-radius: var(--radius-xxl);
    box-shadow: var(--shadow-4);
    overflow: hidden;
    border: 1px solid var(--separator-opaque);
}

/* 苹果风格头部 */
.header {
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 48px 40px 40px;
    text-align: center;
    border-bottom: 1px solid var(--separator-opaque);
}

.header-icon {
    font-size: 48px;
    margin-bottom: 16px;
    color: var(--color-blue);
}

.header h1 {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.header p {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-weight: 400;
}

.header-stats {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-top: 24px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-large);
    transition: var(--transition-normal);
    min-width: 100px;
}

.stat-item:hover {
    background: var(--fill-secondary);
    transform: translateY(-1px);
}

.stat-item i {
    font-size: 20px;
    color: var(--color-blue);
}

.stat-item span {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
    text-align: center;
}

/* 苹果风格主内容区域 */
.main-content {
    padding: 32px 40px 40px;
}

/* 苹果风格上传区域 */
.upload-section {
    margin-bottom: 32px;
}

.upload-area {
    border: 2px dashed var(--color-gray-3);
    border-radius: var(--radius-large);
    padding: 40px;
    text-align: center;
    transition: var(--transition-normal);
    background: var(--bg-secondary);
    margin-bottom: 24px;
    position: relative;
}

.upload-area:hover {
    border-color: var(--color-blue);
    background: var(--fill-tertiary);
}

.upload-area.dragover {
    border-color: var(--color-blue);
    background: var(--fill-secondary);
    border-style: solid;
    transform: scale(1.01);
}

.upload-icon {
    font-size: 48px;
    color: var(--color-blue);
    margin-bottom: 16px;
}

.upload-area h3 {
    color: var(--text-primary);
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 17px;
}

.upload-area p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 15px;
}

.file-input {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
    top: 0;
    left: 0;
}

.file-input-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--color-blue);
    color: var(--text-white);
    border-radius: var(--radius-medium);
    cursor: pointer;
    transition: var(--transition-normal);
    font-size: 15px;
    border: none;
    font-weight: 500;
    box-shadow: var(--shadow-2);
}

.file-input-button:hover {
    background: #0056CC;
    transform: translateY(-1px);
    box-shadow: var(--shadow-3);
}

/* 苹果风格按钮 */
.action-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-medium);
    cursor: pointer;
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition-normal);
    text-decoration: none;
    box-shadow: var(--shadow-2);
    min-width: 120px;
    justify-content: center;
    will-change: transform, box-shadow;
}

.btn-primary {
    background: var(--color-green);
    color: var(--text-white);
}

.btn-primary:hover {
    background: #28A745;
    transform: translateY(-1px);
    box-shadow: var(--shadow-3);
}

.btn-success {
    background: var(--color-blue);
    color: var(--text-white);
}

.btn-success:hover {
    background: #0056CC;
    transform: translateY(-1px);
    box-shadow: var(--shadow-3);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--separator-opaque);
}

.btn-secondary:hover {
    background: var(--fill-secondary);
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-1);
}

.btn:disabled {
    background: var(--fill-quaternary);
    color: var(--text-quaternary);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn:disabled:hover {
    transform: none;
}

/* 苹果风格信息卡片 */
.info-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.info-card {
    background: var(--bg-primary);
    border: 1px solid var(--separator-opaque);
    border-radius: var(--radius-large);
    padding: 24px;
    display: flex;
    gap: 16px;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-1);
}

.info-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-3);
    background: var(--fill-tertiary);
}

.info-icon {
    font-size: 24px;
    color: var(--color-blue);
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.info-content h3 {
    color: var(--text-primary);
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 17px;
}

.info-content p {
    color: var(--text-secondary);
    line-height: 1.47059;
    font-size: 15px;
}

/* 苹果风格编辑器区域 */
.editor-section {
    margin-top: 32px;
}

.editor-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.editor-panel {
    background: var(--bg-primary);
    border: 1px solid var(--separator-opaque);
    border-radius: var(--radius-large);
    overflow: hidden;
    box-shadow: var(--shadow-1);
    transition: var(--transition-normal);
}

.editor-panel:hover {
    box-shadow: var(--shadow-3);
}

.panel-header {
    background: var(--bg-secondary);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--separator-opaque);
}

.panel-header i {
    color: var(--color-blue);
    font-size: 16px;
}

.panel-header span {
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
    font-size: 15px;
}

.panel-actions {
    display: flex;
    gap: 8px;
}

.panel-btn {
    background: var(--fill-tertiary);
    border: none;
    padding: 6px 8px;
    border-radius: var(--radius-small);
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    font-size: 14px;
}

.panel-btn:hover {
    background: var(--fill-secondary);
    color: var(--text-primary);
}

.editor-wrapper {
    position: relative;
}

.editor-textarea {
    width: 100%;
    height: 400px;
    padding: 20px;
    border: none;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    font-size: 13px;
    line-height: 1.5;
    resize: vertical;
    background: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
    transition: opacity var(--transition-normal), background-color var(--transition-fast);
    will-change: opacity;
}

.editor-textarea:focus {
    background: var(--fill-quaternary);
}

.editor-textarea::placeholder {
    color: var(--text-tertiary);
}

.editor-info {
    background: var(--bg-secondary);
    padding: 8px 20px;
    border-top: 1px solid var(--separator-opaque);
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 400;
}

/* 苹果风格加载动画 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(20px);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.loading-overlay.show {
    opacity: 1;
}

.loading-spinner {
    text-align: center;
    background: var(--bg-primary);
    padding: 32px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-4);
    border: 1px solid var(--separator-opaque);
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--fill-tertiary);
    border-top: 3px solid var(--color-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 16px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-spinner p {
    font-size: 15px;
    font-weight: 500;
    margin: 0;
    color: var(--text-primary);
}

/* 苹果风格通知 */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--bg-primary);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-4);
    padding: 16px 20px;
    transform: translateX(400px);
    transition: var(--transition-normal);
    z-index: 1001;
    max-width: 320px;
    border: 1px solid var(--separator-opaque);
}

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

.notification-content {
    display: flex;
    align-items: center;
    gap: 12px;
}

.notification-icon {
    font-size: 20px;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.notification.success .notification-icon {
    color: var(--color-green);
}

.notification.error .notification-icon {
    color: var(--color-red);
}

.notification.info .notification-icon {
    color: var(--color-blue);
}

.notification-message {
    font-weight: 400;
    color: var(--text-primary);
    font-size: 15px;
    line-height: 1.47059;
    flex: 1;
}

/* 苹果风格滚动条 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--color-gray-3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-2);
}

/* 文本选择样式 */
::selection {
    background: var(--color-blue-light);
    color: var(--text-white);
}

/* 苹果风格响应式设计 */
@media (max-width: 1024px) {
    .editor-container {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .header-stats {
        flex-wrap: wrap;
        gap: 16px;
    }

    .info-section {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    body {
        padding: 16px;
    }

    .container {
        max-width: 100%;
    }

    .header {
        padding: 32px 24px 24px;
    }

    .header h1 {
        font-size: 28px;
    }

    .header-icon {
        font-size: 40px;
    }

    .main-content {
        padding: 24px;
    }

    .action-buttons {
        flex-direction: column;
        gap: 12px;
    }

    .btn {
        width: 100%;
        max-width: 280px;
    }

    .upload-area {
        padding: 32px 24px;
    }

    .notification {
        right: 16px;
        left: 16px;
        max-width: none;
    }
}

@media (max-width: 480px) {
    body {
        padding: 12px;
    }

    .header {
        padding: 24px 20px 20px;
    }

    .header h1 {
        font-size: 24px;
    }

    .header p {
        font-size: 15px;
    }

    .main-content {
        padding: 20px;
    }

    .editor-textarea {
        height: 300px;
        padding: 16px;
        font-size: 13px;
    }

    .upload-area {
        padding: 24px 20px;
    }

    .info-card {
        padding: 20px;
    }

    .panel-header {
        padding: 12px 16px;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #FFFFFF;
        --text-secondary: #EBEBF599;
        --text-tertiary: #EBEBF54D;
        --text-quaternary: #EBEBF52E;

        --bg-primary: #1C1C1E;
        --bg-secondary: #2C2C2E;
        --bg-tertiary: #3A3A3C;
        --bg-grouped: #000000;

        --fill-primary: #7676804D;
        --fill-secondary: #78788040;
        --fill-tertiary: #7676803D;
        --fill-quaternary: #7676802E;

        --separator: #54545899;
        --separator-opaque: #38383A;

        --color-gray-1: #8E8E93;
        --color-gray-2: #636366;
        --color-gray-3: #48484A;
        --color-gray-4: #3A3A3C;
        --color-gray-5: #2C2C2E;
        --color-gray-6: #1C1C1E;
    }
}

/* 减少动画模式支持 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 焦点指示器 */
.btn:focus-visible {
    outline: 2px solid var(--color-blue);
    outline-offset: 2px;
}