/* ========================================
   YOLOv8 Web Application - 简约科技风样式
   ======================================== */

/* ========== 全局变量 ========== */
:root {
    /* 配色方案 - 简约蓝白灰 */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;

    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-dark: #1e293b;

    /* 文本色 */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;
    --text-light: #ffffff;

    /* 边框 */
    --border-color: #e2e8f0;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;

    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* 字体 */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;

    /* 过渡 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== 基础重置 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--bg-secondary);
    line-height: 1.6;
    min-height: 100vh;
}

img, video {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    outline: none;
}

input, select, textarea {
    font-family: inherit;
    outline: none;
}

/* ========== 头部导航 ========== */
.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.header .container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    font-size: 2rem;
}

.nav {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-link:hover {
    background: var(--bg-tertiary);
    color: var(--primary-color);
}

.nav-link.active {
    background: var(--primary-color);
    color: var(--text-light);
}

/* ========== 主内容区 ========== */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
}

.container {
    width: 100%;
}

/* ========== 分区切换 ========== */
.section {
    display: none;
    animation: fadeIn var(--transition-base);
}

.section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== 网格布局 ========== */
.grid {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: var(--spacing-lg);
}

/* ========== 卡片 ========== */
.card {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
    border: 1px solid var(--border-color);
}

.card:hover {
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

/* ========== 配置面板 ========== */
.config-panel {
    height: fit-content;
    position: sticky;
    top: 100px;
}

/* ========== 文件上传区 ========== */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    margin-bottom: var(--spacing-lg);
    background: var(--bg-secondary);
}

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

.upload-area.dragover {
    border-color: var(--primary-color);
    background: var(--primary-light);
    transform: scale(1.01);
}

.upload-placeholder i {
    font-size: 3rem;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-sm);
}

.upload-placeholder p {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.file-hint {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.file-preview {
    position: relative;
}

.file-preview img,
.file-preview video {
    width: 100%;
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--spacing-sm);
}

.file-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius-sm);
}

.file-info i {
    color: var(--primary-color);
}

.file-info span {
    flex: 1;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.btn-remove {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--danger-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-remove:hover {
    background: #dc2626;
    transform: scale(1.1);
}

/* ========== 表单组件 ========== */
.form-group {
    margin-bottom: var(--spacing-md);
}

.param-hint {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: var(--spacing-xs);
    display: block;
}

.param-explain {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
    padding: 0.5rem;
    background: var(--bg-secondary);
    border-radius: 4px;
    border-left: 3px solid var(--primary-color);
}

.form-group label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.form-group label i {
    margin-right: var(--spacing-xs);
    color: var(--primary-color);
}

.value-display {
    background: var(--primary-color);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
}

.form-control {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ========== 滑块 ========== */
.slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-tertiary);
    outline: none;
    -webkit-appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: var(--shadow-lg);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-md);
}

/* ========== 复选框 ========== */
.checkbox-label {
    display: flex !important;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

/* ========== 高级选项 ========== */
.advanced-options {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.btn-toggle {
    width: 100%;
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-fast);
}

.btn-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--primary-color);
}

.btn-toggle i {
    transition: transform var(--transition-base);
}

.btn-toggle.active i {
    transform: rotate(180deg);
}

.advanced-content {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
}

/* ========== 按钮 ========== */
.btn-primary,
.btn-secondary {
    width: 100%;
    padding: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-fast);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #3b82f6 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-hover) 0%, #2563eb 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
}

.btn-primary:disabled {
    background: var(--secondary-color);
    cursor: not-allowed;
    opacity: 0.5;
}

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

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
}

.btn-detect {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    font-size: 1.125rem;
}

/* ========== 结果面板 ========== */
.result-panel {
    min-height: 600px;
}

.result-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 500px;
    color: var(--text-tertiary);
}

.result-placeholder i {
    font-size: 5rem;
    margin-bottom: var(--spacing-md);
}

.result-placeholder p {
    font-size: 1.125rem;
}

/* ========== 加载动画 ========== */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 500px;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--bg-tertiary);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-container p {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.progress-bar {
    width: 300px;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--success-color));
    border-radius: 4px;
    transition: width var(--transition-base);
}

.progress-text {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
}

/* ========== 结果容器 ========== */
.result-container {
    animation: fadeIn var(--transition-base);
}

.result-media {
    margin-bottom: var(--spacing-lg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    max-width: 100%;
    position: relative;
}

.result-media img,
.result-media video {
    width: 100%;
    max-width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
}

/* ========== 统计卡片 ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}

.stat-card i {
    font-size: 2rem;
    color: var(--primary-color);
}

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* ========== 检测详情表格 ========== */
.detections-table {
    margin-bottom: var(--spacing-lg);
}

.detections-table h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.detections-table h3 i {
    color: var(--primary-color);
}

.table-wrapper {
    overflow-x: auto;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

thead {
    background: var(--bg-secondary);
}

th {
    padding: var(--spacing-sm);
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

td {
    padding: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
    color: var(--text-primary);
}

tbody tr:hover {
    background: var(--bg-secondary);
}

/* ========== 操作按钮 ========== */
.action-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

/* ========== 关于页面 ========== */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.about-content h3 {
    font-size: 1.25rem;
    margin: var(--spacing-lg) 0 var(--spacing-sm);
    color: var(--text-primary);
}

.about-content p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    line-height: 1.8;
}

.about-content ul {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.about-content li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    color: var(--text-secondary);
    position: relative;
}

.about-content li::before {
    content: "•";
    color: var(--primary-color);
    font-weight: bold;
    position: absolute;
    left: 0;
}

.categories {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin: var(--spacing-md) 0;
}

.category-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--primary-color);
    color: white;
    border-radius: 16px;
    font-size: 0.875rem;
    font-weight: 500;
}

/* ========== 模态框 ========== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    animation: fadeIn var(--transition-base);
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 600px;
    width: 100%;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    animation: slideUp var(--transition-base);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
}

.modal-close {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--danger-color);
    color: white;
}

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-md);
}

.modal-footer button {
    flex: 1;
}

/* ========== 类别搜索 ========== */
.class-search {
    position: relative;
    margin-bottom: var(--spacing-md);
}

.class-search i {
    position: absolute;
    left: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
}

.class-search input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-sm) var(--spacing-sm) 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
}

/* ========== 类别网格 ========== */
.class-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    max-height: 400px;
    overflow-y: auto;
}

.class-item {
    padding: var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.class-item:hover {
    border-color: var(--primary-color);
    background: var(--bg-secondary);
}

.class-item.selected {
    border-color: var(--primary-color);
    background: rgba(37, 99, 235, 0.1);
}

.class-item input[type="checkbox"] {
    accent-color: var(--primary-color);
}

.class-item label {
    flex: 1;
    cursor: pointer;
    user-select: none;
    font-size: 0.875rem;
}

/* ========== 响应式设计 ========== */
@media (max-width: 1200px) {
    .grid {
        grid-template-columns: 1fr;
    }

    .config-panel {
        position: static;
    }

    /* 在移动端和平板上限制结果面板高度，避免过长 */
    .result-panel {
        max-height: 90vh;
        overflow-y: auto;
    }

    .result-media img,
    .result-media video {
        max-height: 70vh;
    }
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: var(--spacing-md);
    }

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

    .action-buttons {
        grid-template-columns: 1fr;
    }

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

    .main-content {
        padding: var(--spacing-md);
    }
}

/* ========== 滚动条美化 ========== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ========== 打印样式 ========== */
@media print {
    .header,
    .config-panel,
    .action-buttons {
        display: none;
    }

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