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

:root {
    --primary-color: #4a90e2;
    --primary-dark: #357abd;
    --success-color: #52c41a;
    --danger-color: #f5222d;
    --warning-color: #faad14;
    --bg-color: #1a1a2e;
    --sidebar-bg: #16213e;
    --text-primary: #fff;
    --text-secondary: #a0a0a0;
    --border-color: #2d3748;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    overflow: hidden;
}

.video-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: relative;
}

/* 顶部栏 */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: var(--sidebar-bg);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
}

.header h1 {
    font-size: 20px;
    font-weight: 600;
}

.connection-status {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.status-dot.online {
    background: var(--success-color);
    box-shadow: 0 0 8px var(--success-color);
    animation: pulse 2s infinite;
}

.status-dot.offline {
    background: var(--text-secondary);
}

.status-dot.connecting {
    background: var(--warning-color);
    animation: blink 1s infinite;
}

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

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

/* 主内容区 - 视频区域 */
.main-content {
    flex: 1;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #0f0f23;
    padding: 20px;
}

.video-wrapper {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    background: #000;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.remote-video-wrapper {
    width: 100%;
    max-width: 1200px;
    aspect-ratio: 16 / 9;
}

.local-video-wrapper {
    position: absolute;
    bottom: 40px;
    right: 40px;
    width: 240px;
    height: 180px;
    border: 3px solid var(--primary-color);
    z-index: 10;
}

.video-wrapper video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
}

.placeholder-icon {
    font-size: 80px;
    margin-bottom: 16px;
    opacity: 0.8;
}

.placeholder-text {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.placeholder-hint {
    font-size: 14px;
    color: var(--text-secondary);
    opacity: 0.7;
}

.video-label {
    position: absolute;
    bottom: 10px;
    left: 10px;
    padding: 4px 12px;
    background: rgba(0, 0, 0, 0.6);
    border-radius: 4px;
    font-size: 13px;
}

/* 控制面板 */
.control-panel {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    padding: 20px;
    background: var(--sidebar-bg);
    border-top: 1px solid var(--border-color);
}

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

.control-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 12px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s;
    min-width: 80px;
}

.control-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.control-btn.active {
    background: var(--primary-color);
}

.control-btn.inactive {
    background: rgba(255, 255, 255, 0.05);
    opacity: 0.6;
}

.control-btn .icon {
    font-size: 24px;
}

.control-btn .label {
    font-size: 12px;
}

.call-btn {
    background: var(--success-color) !important;
    padding: 12px 32px;
}

.call-btn:hover {
    background: #3cb371 !important;
}

.hangup-btn {
    background: var(--danger-color) !important;
    padding: 12px 32px;
}

.hangup-btn:hover {
    background: #dc143c !important;
}

/* 房间面板 */
.room-panel {
    position: absolute;
    top: 70px;
    right: 20px;
    width: 320px;
    background: var(--sidebar-bg);
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    display: none;
    z-index: 200;
}

.room-panel.show {
    display: block;
}

.room-header, .settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.room-header h3, .settings-header h3 {
    font-size: 16px;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-secondary);
    cursor: pointer;
}

.close-btn:hover {
    color: var(--text-primary);
}

.room-content, .settings-content {
    padding: 16px;
}

.room-info {
    margin-bottom: 16px;
}

.room-info label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.room-id-display {
    display: flex;
    gap: 8px;
}

.room-id-display input {
    flex: 1;
    padding: 12px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
    text-align: center;
}

.btn-copy {
    padding: 12px 16px;
    background: var(--primary-color);
    border: none;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-copy:hover {
    background: var(--primary-dark);
}

.room-actions {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.room-actions .btn {
    flex: 1;
}

.room-users h4 {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.user-list {
    max-height: 200px;
    overflow-y: auto;
}

.user-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    margin-bottom: 8px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

.user-info {
    flex: 1;
}

.user-name {
    font-size: 14px;
    font-weight: 500;
}

.user-status {
    font-size: 12px;
    color: var(--text-secondary);
}

.empty-users {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
}

/* 设置面板 */
.settings-panel {
    position: absolute;
    top: 70px;
    right: 20px;
    width: 320px;
    background: var(--sidebar-bg);
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    display: none;
    z-index: 200;
}

.settings-panel.show {
    display: block;
}

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

.setting-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.setting-group select {
    width: 100%;
    padding: 10px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
}

.setting-actions {
    display: flex;
    gap: 8px;
    margin-top: 20px;
}

.setting-actions .btn {
    flex: 1;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* 弹窗 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--sidebar-bg);
    border-radius: 12px;
    width: 90%;
    max-width: 400px;
    box-shadow: var(--card-shadow);
}

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

.modal-header h3 {
    font-size: 16px;
    font-weight: 600;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px;
    border-top: 1px solid var(--border-color);
}

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

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

.form-group input {
    width: 100%;
    padding: 12px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* 通知区域 */
.notification-area {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 500;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.notification {
    padding: 12px 24px;
    background: var(--sidebar-bg);
    border-radius: 8px;
    box-shadow: var(--card-shadow);
    animation: slideIn 0.3s ease;
}

.notification.success {
    border-left: 4px solid var(--success-color);
}

.notification.warning {
    border-left: 4px solid var(--warning-color);
}

.notification.error {
    border-left: 4px solid var(--danger-color);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 通话计时器 */
.call-timer {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    padding: 10px 20px;
    background: var(--success-color);
    border-radius: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 600;
    z-index: 100;
}

.timer-icon {
    font-size: 18px;
}

/* 视频切换按钮 */
.video-switch {
    position: fixed;
    bottom: 120px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
}

.switch-btn {
    padding: 12px 24px;
    background: var(--primary-color);
    border: none;
    border-radius: 25px;
    color: white;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.switch-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

/* 响应式 */
@media (max-width: 768px) {
    .control-panel {
        flex-wrap: wrap;
        gap: 20px;
    }
    
    .control-group {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .control-btn {
        min-width: 60px;
        padding: 10px 14px;
    }
    
    .local-video-wrapper {
        width: 120px;
        height: 90px;
        bottom: 20px;
        right: 20px;
    }
    
    .room-panel, .settings-panel {
        width: calc(100% - 40px);
        right: 20px;
    }
}