/* ============================================
   智慧教室环境监测系统 - 样式表
   服务器部署版：PC / 平板 / 手机全适配
   ============================================ */

/* --- 基础重置与变量 --- */
:root {
    --bg-primary: #0f1923;
    --bg-secondary: #1a2733;
    --bg-card: #1e2d3d;
    --bg-table: #152028;
    --text-primary: #e8edf2;
    --text-secondary: #8899aa;
    --text-muted: #5a6a7a;
    --accent-blue: #4da8da;
    --accent-green: #2ecc71;
    --accent-red: #e74c3c;
    --accent-orange: #f39c12;
    --accent-purple: #9b59b6;
    --border-color: #2a3a4a;
    --border-glow: rgba(77, 168, 218, 0.3);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    /* 响应式安全区域 */
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --safe-left: env(safe-area-inset-left, 0px);
    --safe-right: env(safe-area-inset-right, 0px);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Microsoft YaHei", "Helvetica Neue", sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    min-height: -webkit-fill-available;
    line-height: 1.6;
    background-image:
        radial-gradient(ellipse at 20% 0%, rgba(77, 168, 218, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 100%, rgba(46, 204, 113, 0.05) 0%, transparent 50%);
    padding-top: var(--safe-top);
    padding-bottom: var(--safe-bottom);
    padding-left: var(--safe-left);
    padding-right: var(--safe-right);
    /* 防止 iOS 橡皮筋效果导致误触 */
    overscroll-behavior: none;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 16px;
}

/* ====================== 顶部标题栏 ====================== */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    margin-bottom: 12px;
    box-shadow: var(--shadow-card);
    gap: 12px;
}

.header-left h1 {
    font-size: 1.3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-blue), #6dd5fa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-left .subtitle {
    font-size: 0.72rem;
    color: var(--text-muted);
    letter-spacing: 1px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    font-size: 0.8rem;
    white-space: nowrap;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    animation: pulse 2s infinite;
    flex-shrink: 0;
}

.status-dot.online {
    background: var(--accent-green);
    box-shadow: 0 0 8px rgba(46, 204, 113, 0.6);
}

.status-dot.offline {
    background: var(--accent-red);
    box-shadow: 0 0 8px rgba(231, 76, 60, 0.6);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.clock {
    font-size: 1.2rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    color: var(--accent-blue);
    letter-spacing: 1px;
    white-space: nowrap;
}

/* ====================== 配置栏（移动端可折叠） ====================== */
.config-bar {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    margin-bottom: 12px;
    overflow: hidden;
}

.config-toggle {
    display: none; /* 默认隐藏，移动端显示 */
    padding: 12px 16px;
    cursor: pointer;
    user-select: none;
    font-size: 0.85rem;
    color: var(--text-secondary);
    justify-content: space-between;
    align-items: center;
    -webkit-tap-highlight-color: transparent;
}

.config-toggle:active {
    background: rgba(255,255,255,0.03);
}

.toggle-arrow {
    font-size: 0.7rem;
    transition: transform 0.3s;
}

.config-body {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    padding: 14px 16px;
    flex-wrap: wrap;
}

.config-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.config-item label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.config-item input {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.85rem;
    min-width: 160px;
    transition: var(--transition);
    font-family: inherit;
}

.config-item input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px var(--border-glow);
}

.config-item input[readonly] {
    opacity: 0.6;
    cursor: not-allowed;
}

.config-actions {
    display: flex;
    align-items: flex-end;
}

/* ====================== 按钮 ====================== */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    letter-spacing: 0.5px;
    white-space: nowrap;
    /* 移动端最小触控区域 */
    min-height: 44px;
    min-width: 44px;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.btn:active {
    transform: scale(0.96);
}

.btn-connect {
    background: var(--accent-blue);
    color: #fff;
}

.btn-connect:hover {
    background: #3d94c8;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(77, 168, 218, 0.4);
}

.btn-connect.connected {
    background: var(--accent-red);
}

.btn-connect.connected:hover {
    background: #c0392b;
    box-shadow: 0 4px 16px rgba(231, 76, 60, 0.4);
}

.btn-query {
    background: linear-gradient(135deg, var(--accent-purple), #8e44ad);
    color: #fff;
    font-size: 0.9rem;
    padding: 10px 20px;
}

.btn-query:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(155, 89, 182, 0.5);
}

.btn-weather {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: #fff;
    font-size: 0.9rem;
    padding: 10px 20px;
}

.btn-weather:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.5);
}

.btn-weather:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ====================== 数据卡片 ====================== */
.cards-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 12px;
}

.card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 18px;
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-2px);
    border-color: var(--accent-blue);
    box-shadow: 0 6px 28px rgba(0, 0, 0, 0.4);
}

.card-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.card-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.card-label {
    font-size: 0.72rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}

.card-value {
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.1;
}

.card-unit {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.card-temp .card-value { color: var(--accent-orange); }
.card-humi .card-value { color: var(--accent-blue); }

.smoke-safe {
    color: var(--accent-green) !important;
    font-size: 1.4rem !important;
}

.smoke-danger {
    color: var(--accent-red) !important;
    font-size: 1.4rem !important;
    animation: blink 0.8s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.device-online { color: var(--accent-green) !important; font-size: 1.2rem !important; }
.device-offline { color: var(--accent-red) !important; font-size: 1.2rem !important; }

.card-smoke.smoke-alarm {
    border-color: var(--accent-red);
    box-shadow: 0 0 20px rgba(231, 76, 60, 0.3);
    animation: alarmBorder 1s infinite;
}

@keyframes alarmBorder {
    0%, 100% { border-color: var(--accent-red); }
    50% { border-color: transparent; }
}

/* ====================== 查询区 ====================== */
.query-section {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.query-hint {
    font-size: 0.8rem;
    color: var(--text-secondary);
    flex: 1;
    min-width: 0;
}

.query-result {
    font-size: 0.82rem;
    color: var(--accent-green);
    font-weight: 500;
    text-align: right;
    word-break: break-all;
}

/* ====================== 语音播报输入区 ====================== */
.tts-section {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.tts-input-group {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 0;
}

.tts-input {
    flex: 1;
    min-width: 160px;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    transition: var(--transition);
}

.tts-input::placeholder {
    color: var(--text-muted);
}

.tts-input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px var(--border-glow);
}

.btn-tts {
    background: linear-gradient(135deg, #e67e22, #d35400);
    color: #fff;
    font-size: 0.9rem;
    padding: 10px 20px;
    white-space: nowrap;
}

.btn-tts:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(230, 126, 34, 0.5);
}

.tts-result {
    font-size: 0.8rem;
    color: var(--accent-green);
    font-weight: 500;
    text-align: right;
}

/* ====================== 图表区 ====================== */
.charts-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 12px;
}

.chart-container {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    padding: 16px;
    box-shadow: var(--shadow-card);
}

.chart-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.chart-wrapper {
    position: relative;
    height: 280px;
}

/* ====================== 数据表格 ====================== */
.table-section {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    padding: 16px;
    margin-bottom: 12px;
    box-shadow: var(--shadow-card);
}

.section-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.record-count {
    font-weight: 400;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.table-wrapper {
    overflow-x: auto;
    max-height: 360px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
    -webkit-overflow-scrolling: touch;
}

.table-wrapper::-webkit-scrollbar {
    width: 4px;
    height: 4px;
}

.table-wrapper::-webkit-scrollbar-track {
    background: transparent;
}

.table-wrapper::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
    min-width: 420px;
}

thead {
    position: sticky;
    top: 0;
    z-index: 1;
}

thead th {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-weight: 600;
    text-align: left;
    padding: 10px 12px;
    border-bottom: 2px solid var(--border-color);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

tbody td {
    padding: 8px 12px;
    border-bottom: 1px solid rgba(42, 58, 74, 0.5);
    color: var(--text-primary);
    white-space: nowrap;
}

tbody tr {
    transition: background 0.2s;
}

tbody tr:hover {
    background: rgba(77, 168, 218, 0.05);
}

tbody tr:last-child td {
    border-bottom: none;
}

.empty-row td {
    text-align: center;
    color: var(--text-muted);
    padding: 32px 12px;
    font-style: italic;
}

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.72rem;
    font-weight: 600;
}

.badge-safe {
    background: rgba(46, 204, 113, 0.15);
    color: var(--accent-green);
}

.badge-danger {
    background: rgba(231, 76, 60, 0.15);
    color: var(--accent-red);
}

.badge-online {
    background: rgba(46, 204, 113, 0.15);
    color: var(--accent-green);
}

.badge-offline {
    background: rgba(231, 76, 60, 0.15);
    color: var(--accent-red);
}

/* ====================== 页脚 ====================== */
.footer {
    text-align: center;
    padding: 12px;
    color: var(--text-muted);
    font-size: 0.72rem;
}

/* ================================================================
   响应式断点
   ================================================================ */

/* --- 平板 (768px - 1024px) --- */
@media (max-width: 1024px) {
    .cards-row {
        grid-template-columns: repeat(2, 1fr);
    }

    .chart-wrapper {
        height: 260px;
    }

    .header-left h1 {
        font-size: 1.15rem;
    }
}

/* --- 手机横屏 / 小平板 (≤ 768px) --- */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    /* 标题栏 */
    .header {
        padding: 12px 14px;
        flex-wrap: wrap;
    }

    .header-left h1 {
        font-size: 1.05rem;
    }

    .header-left .subtitle {
        display: none;
    }

    .clock {
        font-size: 1rem;
    }

    .status-indicator {
        padding: 4px 10px;
        font-size: 0.72rem;
    }

    /* 配置栏移动端折叠 */
    .config-toggle {
        display: flex;
    }

    .config-body {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }

    .config-item input {
        width: 100%;
        min-width: unset;
    }

    .config-actions {
        align-self: stretch;
    }

    .config-actions .btn {
        width: 100%;
    }

    /* 卡片 2 列 */
    .cards-row {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    .card {
        padding: 12px 14px;
        gap: 10px;
    }

    .card-icon {
        font-size: 1.6rem;
    }

    .card-value {
        font-size: 1.4rem;
    }

    .smoke-safe, .smoke-danger {
        font-size: 1.1rem !important;
    }

    .device-online, .device-offline {
        font-size: 1rem !important;
    }

    /* 查询区 */
    .query-section {
        padding: 12px 14px;
        gap: 8px;
    }

    .hide-mobile {
        display: none;
    }

    .btn-query, .btn-weather {
        font-size: 0.8rem;
        padding: 8px 14px;
    }

    .query-result {
        width: 100%;
        text-align: left;
        font-size: 0.75rem;
    }

    /* TTS 区 */
    .tts-section {
        padding: 12px 14px;
        gap: 8px;
    }

    .tts-input-group {
        flex-direction: column;
        gap: 8px;
    }

    .tts-input {
        width: 100%;
    }

    .btn-tts {
        width: 100%;
        text-align: center;
    }

    .tts-result {
        width: 100%;
        text-align: left;
        font-size: 0.75rem;
    }

    /* 图表栈式排列 */
    .charts-row {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .chart-wrapper {
        height: 240px;
    }

    .chart-container {
        padding: 12px;
    }
}

/* --- 小手机 (≤ 480px) --- */
@media (max-width: 480px) {
    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .header-right {
        width: 100%;
        justify-content: space-between;
    }

    .cards-row {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
    }

    .card {
        padding: 10px 12px;
        gap: 8px;
    }

    .card-icon {
        font-size: 1.4rem;
    }

    .card-value {
        font-size: 1.2rem;
    }

    .card-label {
        font-size: 0.65rem;
    }

    .chart-wrapper {
        height: 200px;
    }

    .table-wrapper {
        max-height: 260px;
    }

    table {
        font-size: 0.72rem;
        min-width: 360px;
    }

    thead th,
    tbody td {
        padding: 6px 8px;
    }

    .btn {
        min-height: 40px;
        padding: 8px 14px;
        font-size: 0.8rem;
    }
}

/* --- 超小屏 (≤ 360px) --- */
@media (max-width: 360px) {
    .cards-row {
        grid-template-columns: 1fr 1fr;
        gap: 4px;
    }

    .card {
        padding: 8px 10px;
    }

    .card-icon {
        font-size: 1.2rem;
    }

    .card-value {
        font-size: 1.1rem;
    }
}