/* 变量定义 */
:root {
    /* 基础颜色 */
    --primary-color: #3A7BFF;
    --secondary-color: #36D1DC;
    --text-color: #333;
    --text-light: #666;
    --text-lighter: #999;
    --background-color: #f5f7fa;
    --card-color: #ffffff;
    --border-color: #eaeaea;
    --shadow-color: rgba(0, 0, 0, 0.05);
    
    /* 主题色 - 晴天 */
    --sunny-gradient-start: #FFAC30;
    --sunny-gradient-end: #FF6B6B;
    
    /* 主题色 - 雨天 */
    --rainy-gradient-start: #3A7BFF;
    --rainy-gradient-end: #36D1DC;
    
    /* 主题色 - 夜间 */
    --night-gradient-start: #0F172A;
    --night-gradient-end: #1E40AF;
    
    /* 空间变量 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* 圆角 */
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
    
    /* 字体大小 */
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-md: 16px;
    --font-size-lg: 20px;
    --font-size-xl: 24px;
    --font-size-xxl: 32px;
    --font-size-temp: 80px;
    
    /* 动画时间 */
    --transition-fast: 0.2s;
    --transition-normal: 0.3s;
    --transition-slow: 0.5s;
}

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

body {
    font-family: 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    transition: background-color var(--transition-normal);
}

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

input {
    font-family: inherit;
}

/* 天气主题背景 */
body.theme-sunny {
    background: linear-gradient(135deg, var(--sunny-gradient-start), var(--sunny-gradient-end));
    color: #fff;
}

body.theme-rainy {
    background: linear-gradient(135deg, var(--rainy-gradient-start), var(--rainy-gradient-end));
    color: #fff;
}

body.theme-night {
    background: linear-gradient(135deg, var(--night-gradient-start), var(--night-gradient-end));
    color: #fff;
}

/* 主容器 */
.weather-app {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 头部样式 */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
    gap: var(--spacing-lg);
}

.search-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex: 1;
}

.search-box {
    position: relative;
    flex: 0 1 300px;
    z-index: 100;
}

.unit-toggle {
    display: flex;
    flex-direction: column;
    background-color: rgba(255, 255, 255, 0.15);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    margin: 0;
    min-width: 230px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.unit-label {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
    opacity: 0.9;
    color: #fff;
}

.unit-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

.unit-buttons button {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    color: inherit;
    transition: all var(--transition-fast);
    font-size: var(--font-size-md);
    text-align: center;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.unit-buttons button.active {
    background-color: rgba(255, 255, 255, 0.25);
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.unit-buttons button:hover:not(.active) {
    background-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-1px);
}

.right-section {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--spacing-md);
    flex: 0 1 400px;
}

.search-box input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    padding-right: 48px;
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    background-color: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    font-size: var(--font-size-md);
    color: #fff;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.search-box input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.search-box input:focus {
    outline: none;
    background-color: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.search-box input.focused {
    background-color: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.6);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.search-suggestions {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    border-radius: var(--border-radius-md);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    z-index: 10;
    max-height: 240px;
    overflow-y: auto;
    display: none;
    transform-origin: top center;
    transform: translateY(-10px);
    opacity: 0;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.search-suggestions.active {
    display: block;
    transform: translateY(0);
    opacity: 1;
}

.suggestion-item {
    padding: var(--spacing-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    color: var(--text-color);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all var(--transition-fast);
}

.suggestion-item:last-child {
    border-bottom: none;
}

.suggestion-item:before {
    content: "📍";
    margin-right: var(--spacing-sm);
    opacity: 0.7;
    font-size: var(--font-size-sm);
}

.suggestion-item:hover {
    background-color: rgba(0, 0, 0, 0.05);
    padding-left: calc(var(--spacing-md) + 4px);
}

.suggestion-item .city-name {
    font-weight: 500;
}

.suggestion-item .province {
    font-size: var(--font-size-sm);
    color: var(--text-color);
    margin-left: var(--spacing-sm);
    font-weight: 400;
    opacity: 0.85;
}

#location-btn {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    font-size: var(--font-size-md);
    padding: var(--spacing-sm);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    background-color: rgba(255, 255, 255, 0.2);
    transition: all var(--transition-fast);
    width: 36px;
    height: 36px;
}

#location-btn:hover {
    background-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-50%) scale(1.1);
}

/* 修改历史记录区域为网格布局 */
.city-history {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
    max-height: 140px; /* 增加高度，允许显示更多内容 */
    overflow-y: auto;
    padding-right: var(--spacing-xs);
    padding-bottom: var(--spacing-sm);
}

.history-item {
    background-color: rgba(255, 255, 255, 0.15);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-sm) var(--spacing-sm);
    font-size: var(--font-size-sm);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: normal;
    overflow: hidden;
    text-overflow: ellipsis;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    line-height: 1.2;
    word-break: break-all;
}

.history-item:hover {
    background-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
}

/* 主天气显示区域 */
main {
    margin-bottom: var(--spacing-xl);
    flex-grow: 1;
}

.current-weather {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    margin-bottom: var(--spacing-lg);
}

.location {
    margin-bottom: var(--spacing-md);
}

.location h2 {
    font-size: var(--font-size-xl);
    font-weight: 500;
}

.location p {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

.weather-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.temperature {
    font-size: var(--font-size-temp);
    font-weight: 300;
    line-height: 1;
}

.weather-icon {
    width: 80px;
    height: 80px;
    margin-right: var(--spacing-md);
}

.weather-icon svg {
    width: 100%;
    height: 100%;
}

.weather-desc {
    font-size: var(--font-size-lg);
}

.details {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.detail-item {
    display: flex;
    flex-direction: column;
    min-width: 100px;
}

.detail-label {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

.detail-value {
    font-size: var(--font-size-md);
    font-weight: 500;
}

.air-quality {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
}

.air-quality h3 {
    font-size: var(--font-size-md);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.aqi-indicator {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.aqi-value {
    font-size: var(--font-size-lg);
    font-weight: 500;
}

.aqi-bar {
    height: 8px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    overflow: hidden;
}

.aqi-fill {
    height: 100%;
    width: 0;
    background: linear-gradient(to right, #4CAF50, #FFEB3B, #FF5722);
    transition: width var(--transition-normal);
}

.aqi-label {
    font-size: var(--font-size-sm);
    text-align: right;
}

.weather-alert {
    background-color: rgba(255, 87, 34, 0.2);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    display: none;
}

.weather-alert.active {
    display: block;
}

.alert-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.alert-content {
    font-size: var(--font-size-sm);
}

/* 预报区域 */
.forecast-section {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.tab-nav {
    display: flex;
    background-color: rgba(255, 255, 255, 0.1);
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-md);
    text-align: center;
    color: inherit;
    transition: all var(--transition-fast);
}

.tab-btn.active {
    background-color: rgba(255, 255, 255, 0.2);
    font-weight: 500;
}

.tab-content {
    padding: var(--spacing-lg);
}

.tab-pane {
    display: none;
}

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

/* 小时预报 */
.hourly-chart-container {
    height: 200px;
    margin-bottom: var(--spacing-lg);
}

.hourly-list {
    display: flex;
    overflow-x: auto;
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    scrollbar-width: thin;
}

.hourly-list::-webkit-scrollbar {
    height: 4px;
}

.hourly-list::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
}

.hourly-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 60px;
}

.hourly-time {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
}

.hourly-icon {
    width: 40px;
    height: 40px;
    margin-bottom: var(--spacing-xs);
}

.hourly-temp {
    font-size: var(--font-size-md);
    font-weight: 500;
}

/* 日预报 */
.daily-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.daily-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-md);
}

.daily-date {
    flex: 1;
}

.daily-day {
    font-size: var(--font-size-md);
    font-weight: 500;
}

.daily-date-num {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

.daily-icon {
    width: 48px;
    height: 48px;
    margin: 0 var(--spacing-md);
}

.daily-temp {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.daily-high, .daily-low {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.daily-high-value {
    font-size: var(--font-size-md);
    font-weight: 500;
}

.daily-low-value {
    font-size: var(--font-size-md);
    opacity: 0.8;
}

.daily-high-label, .daily-low-label {
    font-size: var(--font-size-xs);
    opacity: 0.8;
}

/* 生活指数 */
.life-indices {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.life-index-item {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.index-icon {
    font-size: 28px;
    margin-bottom: var(--spacing-xs);
}

.index-name {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

.index-value {
    font-size: var(--font-size-lg);
    font-weight: 500;
}

/* 加载动画 */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 100;
    backdrop-filter: blur(5px);
}

.loading.hidden {
    display: none;
}

.loading-cloud {
    position: relative;
    width: 80px;
    height: 40px;
    margin-bottom: var(--spacing-md);
}

.cloud-body {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 60%;
    background-color: white;
    border-radius: 20px;
}

.cloud-circle {
    position: absolute;
    background-color: white;
    border-radius: 50%;
}

.cloud-circle.c1 {
    width: 36px;
    height: 36px;
    top: 0;
    left: 10px;
}

.cloud-circle.c2 {
    width: 28px;
    height: 28px;
    top: 5px;
    right: 10px;
}

.cloud-circle.c3 {
    width: 20px;
    height: 20px;
    top: 15px;
    left: 30px;
}

.loading p {
    color: white;
    font-size: var(--font-size-md);
}

/* 错误提示 */
.error-message {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: white;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    z-index: 200;
    max-width: 90%;
    width: 400px;
    display: none;
}
.error-message.active {display:none;}
.error-message p {
    text-align: center;
    color: var(--text-color);
}
.error-message button {
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--primary-color);
    color: white;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
}

.error-message button:hover {
    background-color: #2A6BE1;
}

/* 动画 */
@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.weather-icon {
    animation: pulse 2s infinite ease-in-out;
}

@keyframes float {
    0% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
    100% {
        transform: translateY(0);
    }
}

.loading-cloud {
    animation: float 2s infinite ease-in-out;
}

/* 历史记录部分 */
.history-section {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    backdrop-filter: blur(5px);
    max-width: 400px;
    width: 100%;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.history-title {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    font-weight: 500;
}

.clear-history-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    opacity: 0.8;
    transition: all var(--transition-fast);
    color: #fff;
    background-color: rgba(255, 255, 255, 0.1);
}

.clear-history-btn:hover {
    opacity: 1;
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

/* Toast消息 */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 12px 24px;
    border-radius: 4px;
    font-size: 14px;
    z-index: 1000;
    opacity: 0;
    transition: all 0.3s ease;
}

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

/* 历史记录为空时的样式 */
.history-empty {
    text-align: center;
    padding: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
    grid-column: 1 / -1;
}