/**
 * 同城商家AI工具箱 - 统一样式
 * 紫色渐变主题，延续懒人AI工具箱风格
 */

/* ========== CSS变量 ========== */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-color: #764ba2;
    --secondary-color: #667eea;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --text-primary: #333;
    --text-secondary: #666;
    --text-muted: #999;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --border-color: #e5e7eb;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding-bottom: 80px;
    color: var(--text-primary);
    line-height: 1.6;
}

/* ========== 顶部导航 ========== */
.top-nav {
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 12px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    color: #fff;
    font-size: 18px;
    font-weight: bold;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-link {
    color: rgba(255,255,255,0.9);
    text-decoration: none;
    font-size: 13px;
    padding: 6px 12px;
    border-radius: 20px;
    transition: all 0.2s;
}

.nav-link:hover, .nav-link.active {
    background: rgba(255,255,255,0.2);
    color: #fff;
}

/* ========== 头部区域 ========== */
.header {
    text-align: center;
    padding: 30px 16px;
    color: #fff;
}

.header h1 {
    font-size: 28px;
    margin-bottom: 10px;
}

.header p {
    opacity: 0.9;
    font-size: 15px;
}

.slogan-badge {
    display: inline-block;
    background: rgba(255,255,255,0.2);
    padding: 8px 20px;
    border-radius: 25px;
    margin-top: 16px;
    font-size: 14px;
}

/* ========== 主容器 ========== */
.container {
    max-width: 480px;
    margin: 0 auto;
    padding: 0 16px;
}

/* ========== 统计卡片 ========== */
.stats-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-md);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    text-align: center;
}

.stat-item .stat-num {
    font-size: 26px;
    font-weight: bold;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-item .stat-label {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ========== 工具卡片网格 ========== */
.tools-section {
    margin-bottom: 16px;
}

.section-title {
    color: #fff;
    font-size: 18px;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 20px;
    background: #fff;
    border-radius: 2px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.tool-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 18px 14px;
    text-decoration: none;
    color: inherit;
    box-shadow: var(--shadow-md);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.tool-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity 0.3s;
}

.tool-card:hover::after {
    opacity: 1;
}

.tool-icon {
    font-size: 32px;
    margin-bottom: 10px;
}

.tool-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.tool-desc {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.4;
}

.tool-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 3px 8px;
    border-radius: 10px;
    font-size: 10px;
    font-weight: 600;
}

.badge-free {
    background: var(--success-color);
    color: #fff;
}

.badge-vip {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff;
}

.badge-hot {
    background: var(--danger-color);
    color: #fff;
}

/* ========== 热门推荐 ========== */
.hot-section {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 18px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-md);
}

.hot-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.hot-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.hot-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px;
    background: var(--bg-light);
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.hot-item:hover {
    background: linear-gradient(135deg, rgba(102,126,234,0.1), rgba(118,75,162,0.1));
}

.hot-rank {
    width: 24px;
    height: 24px;
    background: var(--primary-gradient);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
    flex-shrink: 0;
}

.hot-info {
    flex: 1;
}

.hot-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.hot-desc {
    font-size: 12px;
    color: var(--text-muted);
}

.hot-arrow {
    color: var(--text-muted);
    font-size: 18px;
}

/* ========== 表单样式 ========== */
.form-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-md);
}

.form-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

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

.form-label .required {
    color: var(--danger-color);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 12px 14px;
    font-size: 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all 0.2s;
    background: var(--bg-white);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(118,75,162,0.1);
}

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

.form-hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 6px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

/* ========== 按钮样式 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(118,75,162,0.4);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: var(--bg-light);
    color: var(--text-primary);
}

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

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

/* ========== 结果展示 ========== */
.result-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-md);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.result-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

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

.result-content {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-break: break-word;
}

.result-content h1,
.result-content h2,
.result-content h3 {
    color: var(--text-primary);
    margin: 16px 0 8px 0;
}

.result-content ul,
.result-content ol {
    margin: 8px 0;
    padding-left: 20px;
}

.result-content li {
    margin-bottom: 6px;
}

.result-content strong {
    color: var(--primary-color);
}

/* ========== Loading状态 ========== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-modal {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 30px 40px;
    text-align: center;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--bg-light);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 16px;
}

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

.loading-text {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ========== Toast提示 ========== */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(0,0,0,0.8);
    color: #fff;
    padding: 12px 24px;
    border-radius: 25px;
    font-size: 14px;
    z-index: 10000;
    opacity: 0;
    transition: all 0.3s;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.success {
    background: var(--success-color);
}

.toast.error {
    background: var(--danger-color);
}

/* ========== Tab切换 ========== */
.tabs {
    display: flex;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    padding: 4px;
    margin-bottom: 16px;
}

.tab-item {
    flex: 1;
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-secondary);
}

.tab-item.active {
    background: var(--bg-white);
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ========== 底部导航 ========== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 10px 16px;
    padding-bottom: max(10px, env(safe-area-inset-bottom));
    display: flex;
    justify-content: space-around;
    border-top: 1px solid var(--border-color);
    z-index: 100;
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 11px;
    transition: color 0.2s;
}

.bottom-nav-item.active {
    color: var(--primary-color);
}

.bottom-nav-item .nav-icon {
    font-size: 22px;
}

/* ========== 空状态 ========== */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}

.empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-text {
    font-size: 14px;
}

/* ========== 响应式适配 ========== */
@media (max-width: 375px) {
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

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

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

/* ========== 复制的提示 ========== */
.copy-hint {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0,0,0,0.8);
    color: #fff;
    padding: 16px 32px;
    border-radius: var(--radius-md);
    font-size: 14px;
    z-index: 10001;
    animation: fadeIn 0.2s ease-out;
}