/* Private Chat Room - 主样式表（深色模式） */

:root {
    --bg-primary: #0f0f13;
    --bg-secondary: #1a1a24;
    --bg-tertiary: #252532;
    --bg-hover: #2a2a3a;
    --text-primary: #e8e8f0;
    --text-secondary: #9898a8;
    --text-muted: #686878;
    --accent: #6c5ce7;
    --accent-hover: #5a4bd1;
    --accent-light: rgba(108, 92, 231, 0.15);
    --success: #00b894;
    --warning: #fdcb6e;
    --danger: #e17055;
    --border: #2a2a3a;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.2s ease;
}

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

body.media-viewer-open {
    overflow: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* ========== 首页 ========== */
.home-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #1a1030 100%);
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 420px;
}

.home-container {
    max-width: 480px;
}

.home-card {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 40px 32px;
    box-shadow: var(--shadow);
    text-align: center;
    border: 1px solid var(--border);
}

/* 暂时离开 / 继续聊天 */
.resume-chat-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 20px;
    margin-bottom: 24px;
    background: var(--accent-light);
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    flex-wrap: wrap;
}

.resume-chat-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
    text-align: left;
}

.resume-label {
    font-size: 0.75rem;
    color: var(--accent);
    font-weight: 600;
}

.resume-code {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.btn-pause {
    color: var(--warning);
}

.btn-pause:hover {
    color: var(--warning);
    background: rgba(253, 203, 110, 0.15);
}

/* 首页双入口 */
.home-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 28px;
}

.home-action-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 20px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
    color: inherit;
    font-family: inherit;
    text-align: center;
}

.home-action-card:hover {
    border-color: var(--accent);
    background: var(--accent-light);
    transform: translateY(-2px);
}

.action-icon {
    font-size: 1.75rem;
}

.action-title {
    font-size: 1rem;
    font-weight: 600;
}

.action-desc {
    font-size: 0.7rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* 首页弹窗 */
.home-modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.home-modal .modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
}

.home-modal-dialog {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    width: 100%;
    max-width: 400px;
    max-height: 90vh;
    overflow-y: auto;
    z-index: 1;
    text-align: left;
}

.home-modal-dialog h3 {
    font-size: 1.2rem;
    margin-bottom: 6px;
    text-align: center;
}

.modal-hint {
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-align: center;
    margin-bottom: 20px;
}

.modal-close-btn {
    position: absolute;
    top: 12px;
    right: 14px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
}

.form-field {
    margin-bottom: 14px;
}

.form-field label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-field input,
.form-field textarea {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
}

.form-field input:focus,
.form-field textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.form-field textarea {
    resize: vertical;
    min-height: 80px;
    line-height: 1.5;
}

.form-section {
    margin-bottom: 18px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
}

.form-section:last-of-type {
    border-bottom: none;
}

.section-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.checkbox-row input {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
    flex-shrink: 0;
}

.btn-block {
    width: 100%;
    margin-top: 8px;
}

.btn-sm {
    padding: 8px 14px;
    font-size: 0.85rem;
    white-space: nowrap;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.copy-row {
    display: flex;
    gap: 8px;
}

.copy-row input {
    flex: 1;
    min-width: 0;
}

.share-room-code {
    text-align: center;
    padding: 14px;
    background: var(--accent-light);
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 1.1rem;
}

.share-room-code strong {
    color: var(--accent);
    font-size: 1.4rem;
    letter-spacing: 2px;
}

.success-msg {
    background: rgba(0, 184, 148, 0.15);
    color: var(--success);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 0.9rem;
    text-align: center;
}

.logo {
    color: var(--accent);
    margin-bottom: 16px;
}

.home-card h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 0.95rem;
}

.join-form {
    margin-bottom: 24px;
}

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

.input-group input {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1.1rem;
    text-align: center;
    letter-spacing: 2px;
    transition: border-color var(--transition);
}

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

.input-group input::placeholder {
    color: var(--text-muted);
    letter-spacing: 0;
    font-size: 0.95rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-primary {
    width: 100%;
    background: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

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

.error-msg {
    background: rgba(225, 112, 85, 0.15);
    color: var(--danger);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.features {
    display: flex;
    justify-content: center;
    gap: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

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

/* ========== 聊天页 ========== */
.chat-page {
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.room-info h2 {
    font-size: 1rem;
    font-weight: 600;
}

.online-status {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.online-status.connected {
    color: var(--success);
}

.my-nickname {
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    padding: 4px 10px;
    border-radius: 20px;
}

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}

.btn-icon:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* 消息列表 */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.loading-messages {
    text-align: center;
    color: var(--text-muted);
    padding: 40px;
}

.message {
    display: flex;
    max-width: 75%;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.message.mine {
    align-self: flex-end;
}

.message.other {
    align-self: flex-start;
}

.message-bubble {
    padding: 10px 14px;
    border-radius: var(--radius);
    position: relative;
    word-break: break-word;
}

.message.mine .message-bubble {
    background: var(--accent);
    color: #fff;
    border-bottom-right-radius: 4px;
}

.message.other .message-bubble {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
}

.message-text {
    font-size: 0.95rem;
    white-space: pre-wrap;
}

.message-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 4px;
    font-size: 0.7rem;
    opacity: 0.7;
}

.message.mine .message-meta {
    justify-content: flex-end;
}

.message-status {
    display: inline-flex;
    align-items: center;
}

.message-status.read::after {
    content: '✓✓';
    color: #74b9ff;
}

.message-status.delivered::after {
    content: '✓✓';
}

.message-status.sent::after {
    content: '✓';
}

/* 图片消息 */
.message-image {
    display: block;
    max-width: 240px;
    max-height: 280px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
}

.message-image:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
}

/* 视频消息（卡片 + 播放按钮，点击全屏预览） */
.message-video-card {
    position: relative;
    max-width: 280px;
    min-width: 180px;
    aspect-ratio: 16 / 10;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    background: #000;
    transition: transform var(--transition), box-shadow var(--transition);
}

.message-video-card:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
}

.message-video-poster {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    pointer-events: none;
}

.message-video-poster-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    color: var(--text-muted);
    font-size: 2rem;
}

.message-video-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.55) 0%, rgba(0, 0, 0, 0.15) 50%, rgba(0, 0, 0, 0.25) 100%);
}

.message-video-play-btn {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: rgba(108, 92, 231, 0.92);
    border: 2px solid rgba(255, 255, 255, 0.35);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-left: 4px;
    box-shadow: 0 4px 20px rgba(108, 92, 231, 0.45);
    transition: transform var(--transition), background var(--transition);
}

.message-video-card:hover .message-video-play-btn {
    transform: scale(1.08);
    background: var(--accent-hover);
}

.message-video-processing,
.message-video-failed {
    cursor: default;
    background: var(--bg-tertiary);
}

.message-video-processing:hover,
.message-video-failed:hover {
    transform: none;
    box-shadow: none;
}

.message-video-processing-inner {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--text-muted);
    font-size: 0.85rem;
    padding: 12px;
    text-align: center;
}

.message-video-spinner {
    width: 28px;
    height: 28px;
    border: 3px solid rgba(255, 255, 255, 0.15);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: video-spin 0.8s linear infinite;
}

.message-video-failed-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

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

/* 闪图消息 */
.message-flash-card {
    position: relative;
    max-width: 200px;
    min-width: 140px;
    aspect-ratio: 3 / 4;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    background: var(--bg-tertiary);
    border: 2px solid var(--accent);
    transition: transform var(--transition);
}

.message-flash-card:hover {
    transform: scale(1.02);
}

.message-flash-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: blur(6px);
    transform: scale(1.08);
    pointer-events: none;
}

.message-flash-thumb-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--text-muted);
}

.message-flash-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    background: rgba(0, 0, 0, 0.35);
}

.message-flash-tag {
    font-size: 0.85rem;
    font-weight: 600;
    color: #fff;
    background: var(--accent);
    padding: 4px 12px;
    border-radius: 20px;
}

.message-flash-tip {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.85);
}

/* 闪图全屏查看 */
.flash-viewer {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.95);
}

.flash-viewer-backdrop {
    position: absolute;
    inset: 0;
}

.flash-viewer-close {
    position: absolute;
    top: max(12px, env(safe-area-inset-top));
    right: 16px;
    z-index: 3;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
}

.flash-viewer-body {
    position: relative;
    z-index: 1;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
    -webkit-user-select: none;
}

.flash-hold-hint {
    position: absolute;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    text-align: center;
    color: #fff;
    pointer-events: none;
}

.flash-hold-icon {
    font-size: 2.5rem;
    animation: flashPulse 1.5s ease infinite;
}

@keyframes flashPulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.7; }
}

.flash-hold-hint p {
    font-size: 1.1rem;
    font-weight: 600;
}

.flash-hold-sub {
    font-size: 0.85rem !important;
    font-weight: 400 !important;
    color: var(--text-secondary);
}

.flash-viewer-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    opacity: 0;
    filter: blur(30px);
    transition: opacity 0.25s, filter 0.25s;
    pointer-events: none;
}

.flash-viewer-image.is-visible {
    opacity: 1;
    filter: none;
}

.flash-countdown {
    position: absolute;
    top: max(16px, env(safe-area-inset-top));
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(225, 112, 85, 0.9);
    color: #fff;
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3;
}

.message-video-badge {
    position: absolute;
    left: 8px;
    bottom: 8px;
    font-size: 0.7rem;
    color: #fff;
    background: rgba(0, 0, 0, 0.55);
    padding: 2px 8px;
    border-radius: 4px;
    pointer-events: none;
}

/* 文件消息 */
.message-file {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-sm);
    min-width: 200px;
}

.message-file-icon {
    font-size: 1.5rem;
}

.message-file-info {
    flex: 1;
    min-width: 0;
}

.message-file-name {
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.message-file-size {
    font-size: 0.75rem;
    opacity: 0.7;
}

.message-file-download {
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    color: inherit;
    text-decoration: none;
}

.message-file-download:hover {
    background: rgba(255, 255, 255, 0.25);
    text-decoration: none;
}

/* 输入区域 */
.chat-input-area {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 12px 16px;
    flex-shrink: 0;
}

.input-toolbar {
    display: flex;
    gap: 4px;
    margin-bottom: 8px;
}

.emoji-panel {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 12px;
    margin-bottom: 8px;
    max-height: 160px;
    overflow-y: auto;
}

.emoji-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 4px;
}

.emoji-item {
    font-size: 1.4rem;
    padding: 4px;
    cursor: pointer;
    border-radius: 4px;
    text-align: center;
    transition: background var(--transition);
}

.emoji-item:hover {
    background: var(--bg-hover);
}

.message-form {
    display: flex;
    gap: 8px;
    align-items: flex-end;
}

.message-form textarea {
    flex: 1;
    padding: 10px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    resize: none;
    max-height: 120px;
    line-height: 1.4;
}

.message-form textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.btn-send {
    width: 44px;
    height: 44px;
    padding: 0;
    background: var(--accent);
    color: #fff;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.btn-send:hover {
    background: var(--accent-hover);
}

/* 上传进度 */
.upload-progress {
    margin-bottom: 8px;
}

.progress-bar {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
    display: block;
}

/* 通用模态层（确认弹窗等） */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
}

/* 图片 / 视频全屏预览 */
.media-viewer {
    position: fixed;
    inset: 0;
    z-index: 1100;
    display: flex;
    flex-direction: column;
    background: rgba(8, 8, 12, 0.97);
}

.media-viewer-backdrop {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.media-viewer-toolbar {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    padding-top: max(12px, env(safe-area-inset-top));
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.6), transparent);
    flex-shrink: 0;
}

.media-viewer-title {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

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

.media-viewer-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    cursor: pointer;
    transition: background var(--transition);
    text-decoration: none;
}

.media-viewer-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

.media-viewer-body {
    position: relative;
    z-index: 1;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 0;
    padding: 8px 16px 24px;
    padding-bottom: max(24px, env(safe-area-inset-bottom));
}

.media-viewer-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: var(--radius-sm);
    user-select: none;
    -webkit-user-drag: none;
}

.media-viewer-video-wrap {
    position: relative;
    flex: 1;
    width: 100%;
    max-width: 960px;
    align-self: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    min-height: 0;
}

.media-viewer-video {
    width: 100%;
    max-height: calc(100vh - 160px);
    border-radius: var(--radius);
    background: #000;
    object-fit: contain;
}

.mv-loading {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 24px;
    width: 100%;
    max-width: none;
    margin: 0;
    text-align: center;
}

.mv-loading-spinner {
    width: 44px;
    height: 44px;
    border: 3px solid var(--bg-tertiary);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: mvSpin 0.8s linear infinite;
}

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

.mv-loading-text {
    font-size: 0.95rem;
    color: var(--text-primary);
}

.mv-loading-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.mv-loading-speed {
    font-size: 0.85rem;
    color: var(--accent);
    font-variant-numeric: tabular-nums;
}

.mv-loading-bar {
    width: 100%;
    max-width: 280px;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}

.mv-loading-fill {
    height: 100%;
    width: 0%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.2s ease;
}

.mv-controls.is-disabled {
    opacity: 0.45;
    pointer-events: none;
}

.mv-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 100%;
    max-width: 960px;
}

.mv-btn {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    cursor: pointer;
    transition: background var(--transition);
}

.mv-btn:hover {
    background: var(--accent-hover);
}

.mv-progress-area {
    flex: 1;
    min-width: 0;
}

.mv-progress {
    width: 100%;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-tertiary);
    border-radius: 2px;
    cursor: pointer;
}

.mv-progress::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
}

.mv-progress::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border: none;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
}

.mv-time {
    flex-shrink: 0;
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
    min-width: 88px;
    text-align: center;
}

.mv-mute {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.mv-mute:hover {
    background: var(--bg-hover);
}

/* 确认弹窗 */
.confirm-modal .modal-dialog {
    position: relative;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 24px;
    max-width: 360px;
    width: 90%;
    border: 1px solid var(--border);
    z-index: 1;
}

.confirm-modal h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.confirm-modal p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 20px;
}

.modal-actions-stack {
    flex-direction: column;
    gap: 10px;
}

.modal-actions-stack .btn-block {
    width: 100%;
}

.modal-hint-sm {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 16px;
    line-height: 1.5;
}

.export-progress-bar {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 16px;
}

.export-progress-fill {
    height: 100%;
    width: 30%;
    background: var(--accent);
    border-radius: 2px;
    animation: exportProgress 1.2s ease-in-out infinite alternate;
}

@keyframes exportProgress {
    from { width: 20%; margin-left: 0; }
    to { width: 80%; margin-left: 20%; }
}

.modal-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 10px 18px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
    padding: 10px 18px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.btn-danger:hover {
    opacity: 0.9;
}

/* 聊天已结束栏 */
.chat-ended-bar {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 20px 16px;
    flex-shrink: 0;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}

.ended-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: center;
}

.btn-exit-chat {
    width: 100%;
    max-width: 280px;
    padding: 14px;
    font-size: 1rem;
}

.ended-hint {
    color: var(--text-muted);
    font-style: italic;
}

/* 允许截屏开关 */
.header-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.screenshot-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 0.75rem;
    color: var(--text-secondary);
    user-select: none;
}

.screenshot-toggle input {
    display: none;
}

.toggle-slider {
    width: 36px;
    height: 20px;
    background: var(--bg-tertiary);
    border-radius: 10px;
    position: relative;
    transition: background 0.2s;
    flex-shrink: 0;
}

.toggle-slider::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    background: #fff;
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: transform 0.2s;
}

.screenshot-toggle input:checked + .toggle-slider {
    background: var(--accent);
}

.screenshot-toggle input:checked + .toggle-slider::after {
    transform: translateX(16px);
}

.toggle-label {
    white-space: nowrap;
}

/* 系统提示（加入/离开房间） */
.message-system {
    display: flex;
    justify-content: center;
    padding: 10px 16px;
    animation: fadeIn 0.3s ease;
}

.message-system span {
    font-size: 0.75rem;
    color: var(--text-muted);
    background: var(--bg-tertiary);
    padding: 6px 14px;
    border-radius: 20px;
    line-height: 1.4;
    text-align: center;
}

.setting-toast {
    position: fixed;
    top: 70px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    z-index: 10001;
    display: none;
    box-shadow: var(--shadow);
}

/* 防截屏蒙版与水印 (ScreenGuard / PrivacyProtect) */
.sg-watermark {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 500;
    overflow: hidden;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(6, 1fr);
    opacity: 0.08;
}

.sg-wm-item {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: #fff;
    transform: rotate(-25deg);
    white-space: nowrap;
}

.sg-idle-mask,
.sg-threat-mask {
    position: fixed;
    inset: 0;
    z-index: 9998;
    display: none;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: rgba(15, 15, 19, 0.92);
}

.sg-idle-content,
.sg-threat-content {
    text-align: center;
    color: var(--text-primary);
}

.sg-threat-content h3 {
    margin: 12px 0 8px;
    color: var(--danger);
}

.sg-threat-content p,
.sg-idle-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.sg-shield-icon {
    font-size: 2.5rem;
}

.sg-feedback-tip {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10000;
    background: rgba(225, 112, 85, 0.95);
    color: #fff;
    padding: 16px 24px;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    display: none;
    box-shadow: var(--shadow);
}

.sg-protected,
.protection-active .chat-messages {
    -webkit-user-select: none;
    user-select: none;
}

/* ========== 响应式 ========== */
@media (max-width: 480px) {
    .home-actions {
        grid-template-columns: 1fr;
    }

    .home-card {
        padding: 32px 24px;
    }

    .features {
        gap: 16px;
    }

    .message {
        max-width: 85%;
    }

    .message-image {
        max-width: 200px;
    }

    .message-video-card {
        max-width: 220px;
    }

    .media-viewer-video {
        max-height: calc(100vh - 200px);
    }

    .mv-time {
        display: none;
    }

    .emoji-grid {
        grid-template-columns: repeat(6, 1fr);
    }

    .screenshot-toggle .toggle-label {
        display: none;
    }
}