/**
 * Niliu子主题 - 工具箱样式
 *
 * 与子比主题风格一致，支持深色模式
 *
 * @package    Niliu
 * @author     逆流
 * @version    1.5.2
 */

/* ============================================================================
   CSS 变量（支持深色模式）
   ============================================================================ */

:root {
    --niliu-toolbox-primary: #3b82f6;
    --niliu-toolbox-primary-hover: #2563eb;
    --niliu-toolbox-bg: #ffffff;
    --niliu-toolbox-card-bg: #ffffff;
    --niliu-toolbox-border: #e5e7eb;
    --niliu-toolbox-text: #1f2937;
    --niliu-toolbox-text-secondary: #6b7280;
    --niliu-toolbox-success: #10b981;
    --niliu-toolbox-warning: #f59e0b;
    --niliu-toolbox-danger: #ef4444;
    --niliu-toolbox-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --niliu-toolbox-shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
    --niliu-toolbox-radius: 12px;
    --niliu-toolbox-radius-sm: 8px;
}

/* 深色模式 */
.dark-theme,
[data-theme="dark"],
.theme-dark {
    --niliu-toolbox-bg: #1a1a2e;
    --niliu-toolbox-card-bg: #16213e;
    --niliu-toolbox-border: #374151;
    --niliu-toolbox-text: #f3f4f6;
    --niliu-toolbox-text-secondary: #9ca3af;
    --niliu-toolbox-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --niliu-toolbox-shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.4);
}

/* ============================================================================
   容器与页面布局
   ============================================================================ */

.niliu-toolbox-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 30px 15px;
}

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

.niliu-toolbox-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--niliu-toolbox-text);
    margin-bottom: 12px;
}

.niliu-toolbox-desc {
    font-size: 1rem;
    color: var(--niliu-toolbox-text-secondary);
    margin-bottom: 20px;
}

/* ============================================================================
   用户状态信息
   ============================================================================ */

.niliu-toolbox-user-info {
    display: inline-flex;
    align-items: center;
    gap: 15px;
    padding: 12px 24px;
    background: var(--niliu-toolbox-card-bg);
    border: 1px solid var(--niliu-toolbox-border);
    border-radius: var(--niliu-toolbox-radius);
    box-shadow: var(--niliu-toolbox-shadow);
}

.niliu-toolbox-user-status {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
    justify-content: center;
}

.niliu-toolbox-user-status .user-type {
    font-weight: 600;
    color: var(--niliu-toolbox-primary);
}

.niliu-toolbox-user-status .usage-info {
    color: var(--niliu-toolbox-text-secondary);
}

.niliu-toolbox-user-status .login-link,
.niliu-toolbox-user-status .upgrade-hint {
    color: var(--niliu-toolbox-warning);
    font-size: 0.9rem;
}

.niliu-toolbox-user-status .login-link:hover {
    text-decoration: underline;
}

/* ============================================================================
   提示框
   ============================================================================ */

.niliu-toolbox-notice {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    margin-bottom: 30px;
    border-radius: var(--niliu-toolbox-radius);
    font-size: 0.95rem;
}

.niliu-toolbox-notice-warning {
    background: #fef3c7;
    border: 1px solid #fcd34d;
    color: #92400e;
}

.dark-theme .niliu-toolbox-notice-warning,
[data-theme="dark"] .niliu-toolbox-notice-warning {
    background: rgba(251, 191, 36, 0.15);
    border-color: rgba(251, 191, 36, 0.3);
    color: #fcd34d;
}

.niliu-toolbox-notice .btn {
    margin-left: auto;
}

/* ============================================================================
   分类筛选
   ============================================================================ */

.niliu-toolbox-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 30px;
    padding: 0 15px;
}

.niliu-toolbox-filter .filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--niliu-toolbox-card-bg);
    border: 1px solid var(--niliu-toolbox-border);
    border-radius: 20px;
    color: var(--niliu-toolbox-text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.niliu-toolbox-filter .filter-btn:hover {
    border-color: var(--niliu-toolbox-primary);
    color: var(--niliu-toolbox-primary);
}

.niliu-toolbox-filter .filter-btn.active {
    background: var(--niliu-toolbox-primary);
    border-color: var(--niliu-toolbox-primary);
    color: #ffffff;
}

.niliu-toolbox-filter .filter-btn i {
    font-size: 0.85rem;
}

@media (max-width: 576px) {
    .niliu-toolbox-filter {
        gap: 8px;
    }

    .niliu-toolbox-filter .filter-btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
}

/* ============================================================================
   工具卡片网格
   ============================================================================ */

.niliu-toolbox-grid {
    display: grid;
    gap: 24px;
}

.niliu-toolbox-grid.columns-2 {
    grid-template-columns: repeat(2, 1fr);
}

.niliu-toolbox-grid.columns-3 {
    grid-template-columns: repeat(3, 1fr);
}

.niliu-toolbox-grid.columns-4 {
    grid-template-columns: repeat(4, 1fr);
}

.niliu-toolbox-grid.columns-5 {
    grid-template-columns: repeat(5, 1fr);
}

/* 响应式 */
@media (max-width: 1200px) {
    .niliu-toolbox-grid.columns-5,
    .niliu-toolbox-grid.columns-4 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .niliu-toolbox-grid.columns-5,
    .niliu-toolbox-grid.columns-4,
    .niliu-toolbox-grid.columns-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .niliu-toolbox-grid {
        grid-template-columns: 1fr !important;
    }

    .niliu-toolbox-container {
        padding: 20px 15px;
    }

    .niliu-toolbox-title {
        font-size: 1.5rem;
    }
}

/* ============================================================================
   工具卡片
   ============================================================================ */

.niliu-tool-card {
    position: relative;
}

.niliu-tool-card-inner {
    background: var(--niliu-toolbox-card-bg);
    border: 1px solid var(--niliu-toolbox-border);
    border-radius: var(--niliu-toolbox-radius);
    padding: 24px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.niliu-tool-card-inner:hover {
    transform: translateY(-4px);
    box-shadow: var(--niliu-toolbox-shadow-lg);
    border-color: var(--niliu-toolbox-primary);
}

/* 阴影样式 */
.style-shadow .niliu-tool-card-inner {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    border: none;
}

.style-shadow .niliu-tool-card-inner:hover {
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

/* 简约样式 */
.style-minimal .niliu-tool-card-inner {
    border: none;
    background: transparent;
}

.style-minimal .niliu-tool-card-inner:hover {
    background: var(--niliu-toolbox-card-bg);
    box-shadow: var(--niliu-toolbox-shadow);
}

.niliu-tool-icon {
    margin-bottom: 12px;
    color: var(--niliu-toolbox-text-secondary);
    font-size: 36px;
    line-height: 1;
    transition: color 0.2s ease;
}

.niliu-tool-card-inner:hover .niliu-tool-icon {
    color: var(--niliu-toolbox-primary);
}

.niliu-tool-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--niliu-toolbox-text);
    margin-bottom: 8px;
}

.niliu-tool-desc {
    font-size: 14px;
    color: var(--niliu-toolbox-text-secondary);
    margin-bottom: 12px;
    flex-grow: 1;
    line-height: 1.6;
}

.niliu-tool-btn {
    width: 100%;
    padding: 8px 16px;
    background: transparent;
    color: var(--niliu-toolbox-primary);
    border: 1px solid var(--niliu-toolbox-primary);
    border-radius: var(--niliu-toolbox-radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.niliu-tool-btn:hover {
    background: var(--niliu-toolbox-primary);
    color: #fff;
}

/* ============================================================================
   模态框
   ============================================================================ */

.niliu-toolbox-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
}

.niliu-toolbox-modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.niliu-toolbox-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
}

.niliu-toolbox-modal-content {
    position: relative;
    width: 90%;
    max-width: 560px;
    max-height: 85vh;
    background: var(--niliu-toolbox-card-bg);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: modalFadeIn 0.2s ease;
}

@keyframes modalFadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.niliu-toolbox-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--niliu-toolbox-border);
    background: var(--niliu-toolbox-bg);
}

.niliu-toolbox-modal-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--niliu-toolbox-text);
    margin: 0;
}

.niliu-toolbox-modal-close {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: 4px;
    color: var(--niliu-toolbox-text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
    font-size: 16px;
}

.niliu-toolbox-modal-close:hover {
    background: var(--niliu-toolbox-border);
    color: var(--niliu-toolbox-text);
}

.niliu-toolbox-modal-body {
    padding: 20px;
    overflow-y: auto;
}

/* ============================================================================
   工具通用样式
   ============================================================================ */

.niliu-tool-content {
    color: var(--niliu-toolbox-text);
}

.niliu-tool-form {
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--niliu-toolbox-text);
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    font-size: 14px;
    color: var(--niliu-toolbox-text);
    background: var(--niliu-toolbox-bg);
    border: 1px solid var(--niliu-toolbox-border);
    border-radius: var(--niliu-toolbox-radius-sm);
    transition: border-color 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--niliu-toolbox-primary);
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

.form-range {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--niliu-toolbox-border);
    border-radius: 3px;
    cursor: pointer;
}

.form-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--niliu-toolbox-primary);
    border-radius: 50%;
    cursor: pointer;
}

.range-value {
    display: inline-block;
    min-width: 40px;
    text-align: center;
    font-weight: 600;
    color: var(--niliu-toolbox-primary);
}

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 0;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--niliu-toolbox-primary);
}

/* ============================================================================
   按钮样式
   ============================================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    border: none;
    border-radius: var(--niliu-toolbox-radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary {
    background: var(--niliu-toolbox-primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--niliu-toolbox-primary-hover);
}

.btn-secondary {
    background: var(--niliu-toolbox-border);
    color: var(--niliu-toolbox-text);
}

.btn-secondary:hover {
    background: #d1d5db;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--niliu-toolbox-border);
    color: var(--niliu-toolbox-text);
}

.btn-outline:hover {
    background: var(--niliu-toolbox-border);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.85rem;
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    background: var(--niliu-toolbox-border);
    color: var(--niliu-toolbox-text);
}

.btn-icon:hover {
    background: var(--niliu-toolbox-primary);
    color: #fff;
}

/* ============================================================================
   工具结果区域
   ============================================================================ */

.niliu-tool-result {
    padding: 20px;
    background: rgba(59, 130, 246, 0.05);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--niliu-toolbox-radius-sm);
    margin-top: 20px;
}

.result-value {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
}

.result-value .label {
    color: var(--niliu-toolbox-text-secondary);
}

.result-value .value {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--niliu-toolbox-primary);
}

/* ============================================================================
   BMI 工具
   ============================================================================ */

.niliu-tool-bmi .result-status {
    margin-top: 15px;
    padding: 10px 16px;
    border-radius: var(--niliu-toolbox-radius-sm);
    font-weight: 500;
}

.niliu-tool-bmi .bmi-scale {
    display: flex;
    margin-top: 20px;
    border-radius: var(--niliu-toolbox-radius-sm);
    overflow: hidden;
}

.niliu-tool-bmi .scale-item {
    flex: 1;
    padding: 10px;
    text-align: center;
    font-size: 0.8rem;
    color: #fff;
}

.niliu-tool-bmi .scale-thin {
    background: #3b82f6;
}

.niliu-tool-bmi .scale-normal {
    background: #10b981;
}

.niliu-tool-bmi .scale-overweight {
    background: #f59e0b;
}

.niliu-tool-bmi .scale-obese {
    background: #ef4444;
}

/* ============================================================================
   番茄时钟
   ============================================================================ */

.niliu-tool-pomodoro .pomodoro-timer {
    text-align: center;
    margin-bottom: 30px;
}

.niliu-tool-pomodoro .timer-display {
    font-size: 4rem;
    font-weight: 700;
    color: var(--niliu-toolbox-primary);
    font-family: 'Monaco', 'Menlo', monospace;
}

.niliu-tool-pomodoro .timer-status {
    margin-top: 10px;
    font-size: 1rem;
    color: var(--niliu-toolbox-text-secondary);
}

.niliu-tool-pomodoro .pomodoro-controls {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 30px;
}

.niliu-tool-pomodoro .pomodoro-settings {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding-top: 20px;
    border-top: 1px solid var(--niliu-toolbox-border);
}

/* ============================================================================
   密码生成器
   ============================================================================ */

.niliu-tool-password .password-display {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.niliu-tool-password .password-display input {
    flex: 1;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 1.1rem;
}

.niliu-tool-password .password-strength {
    padding: 8px 12px;
    border-radius: var(--niliu-toolbox-radius-sm);
    font-size: 0.9rem;
    text-align: center;
}

.niliu-tool-password .password-strength.weak {
    background: #fef2f2;
    color: #dc2626;
}

.niliu-tool-password .password-strength.medium {
    background: #fffbeb;
    color: #d97706;
}

.niliu-tool-password .password-strength.strong {
    background: #f0fdf4;
    color: #16a34a;
}

/* ============================================================================
   文字计数器
   ============================================================================ */

.niliu-tool-wordcount .wordcount-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 20px;
}

@media (max-width: 576px) {
    .niliu-tool-wordcount .wordcount-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

.niliu-tool-wordcount .stat-item {
    padding: 16px;
    background: var(--niliu-toolbox-bg);
    border: 1px solid var(--niliu-toolbox-border);
    border-radius: var(--niliu-toolbox-radius-sm);
    text-align: center;
}

.niliu-tool-wordcount .stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--niliu-toolbox-text-secondary);
    margin-bottom: 6px;
}

.niliu-tool-wordcount .stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--niliu-toolbox-primary);
}

/* ============================================================================
   二维码生成器
   ============================================================================ */

.niliu-tool-qrcode .qrcode-display {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.niliu-tool-qrcode .qrcode-display canvas,
.niliu-tool-qrcode .qrcode-display img {
    border: 4px solid #fff;
    box-shadow: var(--niliu-toolbox-shadow);
    border-radius: var(--niliu-toolbox-radius-sm);
}

/* ============================================================================
   时间戳转换
   ============================================================================ */

.niliu-tool-timestamp .timestamp-current {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 20px;
    background: var(--niliu-toolbox-bg);
    border: 1px solid var(--niliu-toolbox-border);
    border-radius: var(--niliu-toolbox-radius-sm);
    margin-bottom: 24px;
}

.niliu-tool-timestamp .timestamp-current .value {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: 'Monaco', 'Menlo', monospace;
    color: var(--niliu-toolbox-primary);
}

.niliu-tool-timestamp .timestamp-converter {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

@media (max-width: 576px) {
    .niliu-tool-timestamp .timestamp-converter {
        grid-template-columns: 1fr;
    }
}

.niliu-tool-timestamp .converter-section {
    padding: 20px;
    background: var(--niliu-toolbox-bg);
    border: 1px solid var(--niliu-toolbox-border);
    border-radius: var(--niliu-toolbox-radius-sm);
}

.niliu-tool-timestamp .converter-section h4 {
    font-size: 1rem;
    margin-bottom: 16px;
    color: var(--niliu-toolbox-text);
}

.niliu-tool-timestamp .result {
    margin-top: 12px;
    padding: 10px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--niliu-toolbox-radius-sm);
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.9rem;
    word-break: break-all;
}

/* ============================================================================
   Base64 编解码
   ============================================================================ */

.niliu-tool-base64 .base64-tabs {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--niliu-toolbox-border);
}

.niliu-tool-base64 .tab-btn {
    flex: 1;
    padding: 12px;
    background: transparent;
    border: none;
    color: var(--niliu-toolbox-text-secondary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}

.niliu-tool-base64 .tab-btn:hover {
    color: var(--niliu-toolbox-text);
}

.niliu-tool-base64 .tab-btn.active {
    color: var(--niliu-toolbox-primary);
    border-bottom-color: var(--niliu-toolbox-primary);
}

/* ============================================================================
   JSON 格式化
   ============================================================================ */

.niliu-tool-json .json-actions {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.niliu-tool-json .json-status {
    padding: 10px;
    border-radius: var(--niliu-toolbox-radius-sm);
    font-size: 0.9rem;
    text-align: center;
}

.niliu-tool-json .json-status.valid {
    background: #f0fdf4;
    color: #16a34a;
}

.niliu-tool-json .json-status.invalid {
    background: #fef2f2;
    color: #dc2626;
}

.niliu-tool-json textarea {
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.85rem;
}

/* ============================================================================
   颜色转换器
   ============================================================================ */

.niliu-tool-color .color-picker-wrapper {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.niliu-tool-color .color-picker {
    width: 60px;
    height: 60px;
    padding: 0;
    border: none;
    cursor: pointer;
    border-radius: var(--niliu-toolbox-radius-sm);
}

.niliu-tool-color .color-preview {
    flex: 1;
    height: 60px;
    border-radius: var(--niliu-toolbox-radius-sm);
    border: 1px solid var(--niliu-toolbox-border);
}

.niliu-tool-color .color-inputs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 16px;
}

@media (max-width: 576px) {
    .niliu-tool-color .color-inputs {
        grid-template-columns: 1fr;
    }
}

.niliu-tool-color .color-inputs input {
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.85rem;
}

.niliu-tool-color .color-copy-btns {
    display: flex;
    gap: 10px;
    justify-content: center;
}

/* ============================================================================
   单位换算
   ============================================================================ */

.niliu-tool-unit .unit-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.niliu-tool-unit .unit-tabs .tab-btn {
    padding: 8px 16px;
    background: var(--niliu-toolbox-bg);
    border: 1px solid var(--niliu-toolbox-border);
    border-radius: var(--niliu-toolbox-radius-sm);
    color: var(--niliu-toolbox-text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.niliu-tool-unit .unit-tabs .tab-btn:hover {
    border-color: var(--niliu-toolbox-primary);
    color: var(--niliu-toolbox-primary);
}

.niliu-tool-unit .unit-tabs .tab-btn.active {
    background: var(--niliu-toolbox-primary);
    border-color: var(--niliu-toolbox-primary);
    color: #fff;
}

.niliu-tool-unit .unit-selects {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    margin-bottom: 20px;
}

.niliu-tool-unit .unit-selects .form-group {
    flex: 1;
    margin-bottom: 0;
}

.niliu-tool-unit .unit-result {
    padding: 20px;
    background: rgba(59, 130, 246, 0.05);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--niliu-toolbox-radius-sm);
    text-align: center;
    font-size: 1.2rem;
}

.niliu-tool-unit .unit-result .value {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--niliu-toolbox-primary);
}

/* ============================================================================
   加载状态
   ============================================================================ */

.niliu-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.niliu-loading::after {
    content: '';
    width: 32px;
    height: 32px;
    border: 3px solid var(--niliu-toolbox-border);
    border-top-color: var(--niliu-toolbox-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ============================================================================
   复制成功提示
   ============================================================================ */

.niliu-toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    background: #1f2937;
    color: #fff;
    border-radius: var(--niliu-toolbox-radius-sm);
    font-size: 0.9rem;
    z-index: 10000;
    animation: toastIn 0.3s ease;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* ============================================================================
   搜索框样式
   ============================================================================ */

.niliu-toolbox-search {
    max-width: 480px;
    margin: 0 auto 24px;
    position: relative;
}

.niliu-toolbox-search-input {
    width: 100%;
    padding: 14px 48px 14px 20px;
    font-size: 15px;
    color: var(--niliu-toolbox-text);
    background: var(--niliu-toolbox-card-bg);
    border: 1px solid var(--niliu-toolbox-border);
    border-radius: 24px;
    outline: none;
    transition: all 0.25s ease;
    box-shadow: var(--niliu-toolbox-shadow);
}

.niliu-toolbox-search-input:focus {
    border-color: var(--niliu-toolbox-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.niliu-toolbox-search-input::placeholder {
    color: var(--niliu-toolbox-text-secondary);
}

.niliu-toolbox-search-icon {
    position: absolute;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--niliu-toolbox-text-secondary);
    font-size: 16px;
    pointer-events: none;
}

.niliu-toolbox-search-clear {
    position: absolute;
    right: 48px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    display: none;
    align-items: center;
    justify-content: center;
    background: var(--niliu-toolbox-border);
    border: none;
    border-radius: 50%;
    color: var(--niliu-toolbox-text-secondary);
    font-size: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.niliu-toolbox-search-clear:hover {
    background: var(--niliu-toolbox-primary);
    color: #fff;
}

.niliu-toolbox-search.has-value .niliu-toolbox-search-clear {
    display: flex;
}

/* 搜索无结果提示 */
.niliu-toolbox-no-results {
    display: none;
    text-align: center;
    padding: 60px 20px;
    color: var(--niliu-toolbox-text-secondary);
}

.niliu-toolbox-no-results i {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.niliu-toolbox-no-results p {
    font-size: 15px;
    margin: 0;
}

/* 搜索高亮 */
.niliu-tool-card.search-hidden {
    display: none !important;
}

.niliu-tool-name mark,
.niliu-tool-desc mark {
    background: rgba(59, 130, 246, 0.2);
    color: var(--niliu-toolbox-primary);
    padding: 0 2px;
    border-radius: 2px;
}

/* ============================================================================
   去除 Number Input 箭头（Spinner）
   ============================================================================ */

/* Chrome, Safari, Edge, Opera */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* Firefox */
input[type="number"] {
    -moz-appearance: textfield;
    appearance: textfield;
}

/* 工具弹窗内的所有数字输入框 */
.niliu-toolbox-modal input[type="number"] {
    -webkit-appearance: none;
    -moz-appearance: textfield;
    appearance: textfield;
}

/* ============================================================================
   弹窗样式优化（更现代简洁）
   ============================================================================ */

/* 弹窗遮罩层增强 */
.niliu-toolbox-modal-overlay {
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

/* 弹窗容器优化 */
.niliu-toolbox-modal-content {
    max-width: 600px;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--niliu-toolbox-border);
}

/* 弹窗头部优化 */
.niliu-toolbox-modal-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--niliu-toolbox-border);
    background: var(--niliu-toolbox-card-bg);
}

.niliu-toolbox-modal-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--niliu-toolbox-text);
    margin: 0;
}

/* 关闭按钮优化 */
.niliu-toolbox-modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: 8px;
    color: var(--niliu-toolbox-text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 14px;
}

.niliu-toolbox-modal-close:hover {
    background: var(--niliu-toolbox-border);
    color: var(--niliu-toolbox-text);
    transform: rotate(90deg);
}

/* 弹窗内容区优化 */
.niliu-toolbox-modal-body {
    padding: 24px;
    overflow-y: auto;
}

/* 表单样式优化 */
.niliu-toolbox-modal .form-group {
    margin-bottom: 20px;
}

.niliu-toolbox-modal .form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--niliu-toolbox-text);
}

.niliu-toolbox-modal .form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: 14px;
    color: var(--niliu-toolbox-text);
    background: var(--niliu-toolbox-bg);
    border: 1px solid var(--niliu-toolbox-border);
    border-radius: 10px;
    transition: all 0.2s ease;
    box-sizing: border-box;
}

.niliu-toolbox-modal .form-control:focus {
    outline: none;
    border-color: var(--niliu-toolbox-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.niliu-toolbox-modal textarea.form-control {
    resize: vertical;
    min-height: 120px;
    line-height: 1.6;
}

/* Select 下拉框优化 */
.niliu-toolbox-modal select.form-control {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
    cursor: pointer;
}

/* 按钮样式优化 */
.niliu-toolbox-modal .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 500;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.niliu-toolbox-modal .btn-primary {
    background: var(--niliu-toolbox-primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.25);
}

.niliu-toolbox-modal .btn-primary:hover {
    background: var(--niliu-toolbox-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.35);
}

.niliu-toolbox-modal .btn-secondary {
    background: var(--niliu-toolbox-border);
    color: var(--niliu-toolbox-text);
}

.niliu-toolbox-modal .btn-secondary:hover {
    background: #d1d5db;
}

/* 结果区域优化 */
.niliu-toolbox-modal .niliu-tool-result {
    padding: 20px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(59, 130, 246, 0.02) 100%);
    border: 1px solid rgba(59, 130, 246, 0.15);
    border-radius: 12px;
    margin-top: 20px;
}

/* 输入组样式 */
.niliu-toolbox-modal .input-group {
    display: flex;
    gap: 10px;
}

.niliu-toolbox-modal .input-group .form-control {
    flex: 1;
}

.niliu-toolbox-modal .input-group .btn {
    flex-shrink: 0;
}

/* Range 滑块优化 */
.niliu-toolbox-modal .form-range {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--niliu-toolbox-border);
    border-radius: 3px;
    cursor: pointer;
}

.niliu-toolbox-modal .form-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--niliu-toolbox-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(59, 130, 246, 0.3);
    transition: transform 0.15s ease;
}

.niliu-toolbox-modal .form-range::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.niliu-toolbox-modal .form-range::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--niliu-toolbox-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(59, 130, 246, 0.3);
}

/* Checkbox 和 Radio 优化 */
.niliu-toolbox-modal .checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.niliu-toolbox-modal .checkbox-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 0;
    cursor: pointer;
    font-weight: 400;
    font-size: 14px;
    color: var(--niliu-toolbox-text);
}

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

/* 深色模式下弹窗优化 */
.dark-theme .niliu-toolbox-modal-content,
[data-theme="dark"] .niliu-toolbox-modal-content {
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.dark-theme .niliu-toolbox-modal select.form-control,
[data-theme="dark"] .niliu-toolbox-modal select.form-control {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239ca3af' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
}

/* ========================================
   工具内部样式增强
   ======================================== */

/* 工具表单容器 */
.niliu-toolbox-modal .tool-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* 表单组 - 增强版 */
.niliu-toolbox-modal .form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.niliu-toolbox-modal .form-group label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--niliu-toolbox-text);
}

.niliu-toolbox-modal .form-group label i {
    color: var(--niliu-toolbox-primary);
    font-size: 14px;
}

/* 原生输入框样式 - 适用于所有 input */
.niliu-toolbox-modal input[type="text"],
.niliu-toolbox-modal input[type="number"],
.niliu-toolbox-modal input[type="url"],
.niliu-toolbox-modal input[type="email"],
.niliu-toolbox-modal input[type="password"],
.niliu-toolbox-modal input[type="tel"],
.niliu-toolbox-modal textarea,
.niliu-toolbox-modal select {
    width: 100%;
    padding: 14px 16px;
    font-size: 15px;
    line-height: 1.5;
    color: var(--niliu-toolbox-text);
    background: var(--niliu-toolbox-bg);
    border: 2px solid var(--niliu-toolbox-border);
    border-radius: 10px;
    transition: all 0.2s ease;
    box-sizing: border-box;
}

.niliu-toolbox-modal input::placeholder,
.niliu-toolbox-modal textarea::placeholder {
    color: var(--niliu-toolbox-text-muted);
    opacity: 0.7;
}

.niliu-toolbox-modal input:hover,
.niliu-toolbox-modal textarea:hover,
.niliu-toolbox-modal select:hover {
    border-color: var(--niliu-toolbox-primary);
}

.niliu-toolbox-modal input:focus,
.niliu-toolbox-modal textarea:focus,
.niliu-toolbox-modal select:focus {
    outline: none;
    border-color: var(--niliu-toolbox-primary);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
}

/* 输入框带后缀（如"折"） */
.niliu-toolbox-modal .input-group {
    display: flex;
    align-items: stretch;
    gap: 0;
}

.niliu-toolbox-modal .input-group input {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
    flex: 1;
}

.niliu-toolbox-modal .input-group .input-suffix {
    display: flex;
    align-items: center;
    padding: 0 16px;
    background: var(--niliu-toolbox-border);
    border: 2px solid var(--niliu-toolbox-border);
    border-left: none;
    border-radius: 0 10px 10px 0;
    font-size: 14px;
    font-weight: 500;
    color: var(--niliu-toolbox-text-muted);
}

/* 按钮样式增强 */
.niliu-toolbox-modal .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.niliu-toolbox-modal .btn-primary {
    background: linear-gradient(135deg, var(--niliu-toolbox-primary) 0%, #2563eb 100%);
    color: #fff;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.35);
}

.niliu-toolbox-modal .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.45);
}

.niliu-toolbox-modal .btn-primary:active {
    transform: translateY(0);
}

/* 结果区域样式 */
.niliu-toolbox-modal .tool-result {
    margin-top: 24px;
    padding: 20px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(16, 185, 129, 0.05) 100%);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 12px;
}

.niliu-toolbox-modal .tool-result .result-value {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin-bottom: 12px;
}

.niliu-toolbox-modal .tool-result .result-value .label {
    font-size: 14px;
    color: var(--niliu-toolbox-text-muted);
}

.niliu-toolbox-modal .tool-result .result-value .value {
    font-size: 32px;
    font-weight: 700;
    color: var(--niliu-toolbox-primary);
}

.niliu-toolbox-modal .tool-result .result-status {
    padding: 12px 16px;
    background: var(--niliu-toolbox-card-bg);
    border-radius: 8px;
    font-size: 14px;
    color: var(--niliu-toolbox-text);
    line-height: 1.6;
}

.niliu-toolbox-modal .tool-result .result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px dashed var(--niliu-toolbox-border);
}

.niliu-toolbox-modal .tool-result .result-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.niliu-toolbox-modal .tool-result .result-item .label {
    font-size: 14px;
    color: var(--niliu-toolbox-text-muted);
}

.niliu-toolbox-modal .tool-result .result-item .value {
    font-size: 18px;
    font-weight: 600;
    color: var(--niliu-toolbox-primary);
}

/* Tab 选项卡样式 */
.niliu-toolbox-modal .tool-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    padding: 6px;
    background: var(--niliu-toolbox-border);
    border-radius: 10px;
}

.niliu-toolbox-modal .tool-tabs .tab-btn {
    flex: 1;
    padding: 10px 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--niliu-toolbox-text-muted);
    background: transparent;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.niliu-toolbox-modal .tool-tabs .tab-btn:hover {
    color: var(--niliu-toolbox-text);
}

.niliu-toolbox-modal .tool-tabs .tab-btn.active {
    background: var(--niliu-toolbox-card-bg);
    color: var(--niliu-toolbox-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.niliu-toolbox-modal .tab-content {
    display: none;
}

.niliu-toolbox-modal .tab-content.active {
    display: block;
}

/* 表单行样式（如百分比计算） */
.niliu-toolbox-modal .form-row {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.niliu-toolbox-modal .form-row input {
    width: auto;
    flex: 1;
    min-width: 80px;
}

.niliu-toolbox-modal .form-row span {
    font-size: 14px;
    color: var(--niliu-toolbox-text-muted);
    white-space: nowrap;
}

.niliu-toolbox-modal .form-row .result {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 60px;
    padding: 8px 16px;
    background: linear-gradient(135deg, var(--niliu-toolbox-primary) 0%, #2563eb 100%);
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    border-radius: 8px;
}

/* 文本域样式 */
.niliu-toolbox-modal textarea {
    min-height: 120px;
    resize: vertical;
    line-height: 1.6;
}

/* 选择框样式 */
.niliu-toolbox-modal select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%236b7280' d='M8 11L3 5h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 44px;
    cursor: pointer;
}

/* 复选框组样式 */
.niliu-toolbox-modal .checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    padding: 16px;
    background: var(--niliu-toolbox-bg);
    border-radius: 10px;
}

.niliu-toolbox-modal .checkbox-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--niliu-toolbox-text);
    cursor: pointer;
    transition: color 0.2s;
}

.niliu-toolbox-modal .checkbox-group label:hover {
    color: var(--niliu-toolbox-primary);
}

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

/* 工具提示文本 */
.niliu-toolbox-modal .tool-hint {
    margin-top: 8px;
    font-size: 12px;
    color: var(--niliu-toolbox-text-muted);
    line-height: 1.5;
}

.niliu-toolbox-modal .tool-hint i {
    margin-right: 4px;
    color: var(--niliu-toolbox-primary);
}

/* 成功/错误/警告状态 */
.niliu-toolbox-modal .status-success {
    color: #10b981 !important;
    background: rgba(16, 185, 129, 0.1) !important;
    border-color: rgba(16, 185, 129, 0.2) !important;
}

.niliu-toolbox-modal .status-error {
    color: #ef4444 !important;
    background: rgba(239, 68, 68, 0.1) !important;
    border-color: rgba(239, 68, 68, 0.2) !important;
}

.niliu-toolbox-modal .status-warning {
    color: #f59e0b !important;
    background: rgba(245, 158, 11, 0.1) !important;
    border-color: rgba(245, 158, 11, 0.2) !important;
}

/* 暗色模式适配 */
.dark-theme .niliu-toolbox-modal .input-group .input-suffix,
[data-theme="dark"] .niliu-toolbox-modal .input-group .input-suffix {
    background: var(--niliu-toolbox-border);
}

.dark-theme .niliu-toolbox-modal .tool-tabs,
[data-theme="dark"] .niliu-toolbox-modal .tool-tabs {
    background: rgba(255, 255, 255, 0.05);
}

.dark-theme .niliu-toolbox-modal .tool-tabs .tab-btn.active,
[data-theme="dark"] .niliu-toolbox-modal .tool-tabs .tab-btn.active {
    background: var(--niliu-toolbox-card-bg);
}

.dark-theme .niliu-toolbox-modal select,
[data-theme="dark"] .niliu-toolbox-modal select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%239ca3af' d='M8 11L3 5h10z'/%3E%3C/svg%3E");
}

/* 移动端适配 */
@media (max-width: 640px) {
    .niliu-toolbox-modal .tool-tabs {
        flex-wrap: wrap;
    }

    .niliu-toolbox-modal .tool-tabs .tab-btn {
        flex: 1 1 auto;
        min-width: calc(50% - 4px);
    }

    .niliu-toolbox-modal .form-row {
        flex-direction: column;
        align-items: stretch;
    }

    .niliu-toolbox-modal .form-row input {
        width: 100%;
    }

    .niliu-toolbox-modal .tool-result .result-value .value {
        font-size: 26px;
    }
}

/* ========================================
   通用统计网格样式
   ======================================== */

.niliu-toolbox-modal .stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 20px;
}

.niliu-toolbox-modal .stat-item {
    padding: 16px;
    background: linear-gradient(135deg, var(--niliu-toolbox-bg) 0%, rgba(59, 130, 246, 0.03) 100%);
    border: 1px solid var(--niliu-toolbox-border);
    border-radius: 10px;
    text-align: center;
    transition: all 0.2s ease;
}

.niliu-toolbox-modal .stat-item:hover {
    border-color: var(--niliu-toolbox-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.1);
}

.niliu-toolbox-modal .stat-value {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--niliu-toolbox-primary);
    line-height: 1.2;
    margin-bottom: 6px;
}

.niliu-toolbox-modal .stat-label {
    display: block;
    font-size: 12px;
    color: var(--niliu-toolbox-text-muted);
    font-weight: 500;
}

/* 复制按钮样式 */
.niliu-toolbox-modal .copy-btn {
    margin-top: 10px;
}

.niliu-toolbox-modal .copy-btn.copied {
    background: #10b981;
    border-color: #10b981;
    color: #fff;
}

/* 只读文本域样式 */
.niliu-toolbox-modal textarea[readonly] {
    background: var(--niliu-toolbox-bg);
    cursor: default;
}

/* 密码生成器强度指示器 */
.niliu-toolbox-modal .password-strength {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 12px;
    padding: 12px 16px;
    background: var(--niliu-toolbox-bg);
    border-radius: 8px;
}

.niliu-toolbox-modal .strength-bar {
    flex: 1;
    height: 6px;
    background: var(--niliu-toolbox-border);
    border-radius: 3px;
    overflow: hidden;
}

.niliu-toolbox-modal .strength-bar-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.3s ease, background 0.3s ease;
}

.niliu-toolbox-modal .strength-bar-fill.weak {
    background: #ef4444;
    width: 25%;
}

.niliu-toolbox-modal .strength-bar-fill.fair {
    background: #f59e0b;
    width: 50%;
}

.niliu-toolbox-modal .strength-bar-fill.good {
    background: #3b82f6;
    width: 75%;
}

.niliu-toolbox-modal .strength-bar-fill.strong {
    background: #10b981;
    width: 100%;
}

.niliu-toolbox-modal .strength-text {
    font-size: 13px;
    font-weight: 500;
    min-width: 60px;
    text-align: right;
}

/* 滑块数值显示 */
.niliu-toolbox-modal .range-value {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    padding: 4px 10px;
    background: var(--niliu-toolbox-primary);
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    border-radius: 4px;
    margin-left: 12px;
}

/* 颜色预览 */
.niliu-toolbox-modal .color-preview {
    width: 100%;
    height: 80px;
    border-radius: 10px;
    border: 2px solid var(--niliu-toolbox-border);
    margin-bottom: 16px;
    transition: all 0.2s ease;
}

.niliu-toolbox-modal .color-inputs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.niliu-toolbox-modal .color-inputs .form-group {
    margin-bottom: 0;
}

/* JSON格式化工具 */
.niliu-toolbox-modal .json-actions {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
}

.niliu-toolbox-modal .json-actions .btn {
    flex: 1;
}

/* 单位换算工具 */
.niliu-toolbox-modal .unit-selects {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.niliu-toolbox-modal .unit-selects .form-group {
    flex: 1;
    margin-bottom: 0;
}

.niliu-toolbox-modal .unit-arrow {
    font-size: 20px;
    color: var(--niliu-toolbox-primary);
}

.niliu-toolbox-modal .unit-result {
    text-align: center;
    padding: 24px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(16, 185, 129, 0.05) 100%);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 12px;
}

.niliu-toolbox-modal .unit-result .result-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--niliu-toolbox-primary);
    margin-bottom: 8px;
}

.niliu-toolbox-modal .unit-result .result-unit {
    font-size: 14px;
    color: var(--niliu-toolbox-text-muted);
}

/* 移动端适配统计网格 */
@media (max-width: 640px) {
    .niliu-toolbox-modal .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .niliu-toolbox-modal .stat-value {
        font-size: 22px;
    }

    .niliu-toolbox-modal .color-inputs {
        grid-template-columns: 1fr;
    }

    .niliu-toolbox-modal .unit-selects {
        flex-direction: column;
    }

    .niliu-toolbox-modal .unit-arrow {
        transform: rotate(90deg);
    }
}

/* ============================================================================
   键盘测试工具
   ============================================================================ */

.niliu-tool-keyboard-test {
    user-select: none;
}

.niliu-tool-keyboard-test .keyboard-info {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 24px;
    padding: 20px;
    background: var(--niliu-toolbox-bg);
    border: 1px solid var(--niliu-toolbox-border);
    border-radius: 12px;
}

.niliu-tool-keyboard-test .key-display {
    text-align: center;
    min-width: 100px;
}

.niliu-tool-keyboard-test .key-display label {
    display: block;
    font-size: 12px;
    color: var(--niliu-toolbox-text-secondary);
    margin-bottom: 8px;
}

.niliu-tool-keyboard-test .key-name {
    font-size: 36px;
    font-weight: 700;
    color: var(--niliu-toolbox-primary);
    font-family: 'Monaco', 'Menlo', monospace;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.niliu-tool-keyboard-test .key-details {
    flex: 1;
}

.niliu-tool-keyboard-test .key-details p {
    margin: 0 0 6px 0;
    font-size: 13px;
    color: var(--niliu-toolbox-text-secondary);
}

.niliu-tool-keyboard-test .key-details p:last-child {
    margin-bottom: 0;
}

.niliu-tool-keyboard-test .key-details strong {
    color: var(--niliu-toolbox-text);
    font-family: 'Monaco', 'Menlo', monospace;
}

/* 键盘布局 */
.niliu-tool-keyboard-test .keyboard-layout {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 16px;
    background: var(--niliu-toolbox-bg);
    border: 1px solid var(--niliu-toolbox-border);
    border-radius: 12px;
}

.niliu-tool-keyboard-test .keyboard-row {
    display: flex;
    gap: 6px;
    justify-content: center;
}

.niliu-tool-keyboard-test .key {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 8px;
    background: var(--niliu-toolbox-card-bg);
    border: 1px solid var(--niliu-toolbox-border);
    border-radius: 6px;
    font-size: 11px;
    font-weight: 500;
    color: var(--niliu-toolbox-text);
    transition: all 0.1s ease;
    box-shadow: 0 2px 0 var(--niliu-toolbox-border);
}

.niliu-tool-keyboard-test .key:hover {
    background: var(--niliu-toolbox-border);
}

.niliu-tool-keyboard-test .key.active {
    background: var(--niliu-toolbox-primary);
    border-color: var(--niliu-toolbox-primary);
    color: #fff;
    transform: translateY(2px);
    box-shadow: none;
}

/* 特殊按键宽度 */
.niliu-tool-keyboard-test .key.wide {
    min-width: 60px;
}

.niliu-tool-keyboard-test .key.extra-wide {
    min-width: 80px;
}

.niliu-tool-keyboard-test .key.space {
    min-width: 200px;
}

/* 移动端适配 */
@media (max-width: 640px) {
    .niliu-tool-keyboard-test .keyboard-info {
        flex-direction: column;
        text-align: center;
    }

    .niliu-tool-keyboard-test .keyboard-layout {
        padding: 10px;
        overflow-x: auto;
    }

    .niliu-tool-keyboard-test .keyboard-row {
        gap: 4px;
        min-width: 500px;
    }

    .niliu-tool-keyboard-test .key {
        min-width: 28px;
        height: 28px;
        font-size: 9px;
        padding: 0 4px;
    }

    .niliu-tool-keyboard-test .key.wide {
        min-width: 48px;
    }

    .niliu-tool-keyboard-test .key.extra-wide {
        min-width: 60px;
    }

    .niliu-tool-keyboard-test .key.space {
        min-width: 140px;
    }
}