:root {
    --app-sidebar-width: 280px;
}

body,
html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: 'Outfit', 'Roboto', sans-serif;
    background-color: rgb(var(--mdui-color-background));
    color: rgb(var(--mdui-color-on-background));
}

/* ================== Login Area ================== */
.login-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 16px;
    background-color: rgb(var(--mdui-color-surface-container-lowest));
}

.login-card {
    width: 100%;
    max-width: 400px;
    padding: 32px 24px;
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-header h1 {
    color: rgb(var(--mdui-color-primary));
    margin-bottom: 8px;
    font-size: 28px;
    font-weight: 700;
}

.login-header p {
    color: rgb(var(--mdui-color-on-surface-variant));
}

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

.form-group mdui-text-field,
.form-group mdui-select {
    width: 100%;
}

.auto-login {
    display: flex;
    justify-content: center;
    margin-top: 16px;
}

/* Utils */
.loading {
    display: none;
    text-align: center;
    margin-top: 16px;
}

.token-info {
    margin-top: 24px;
    padding: 16px;
    background-color: rgb(var(--mdui-color-surface-variant));
    border-radius: 12px;
    display: none;
}

.token-value {
    word-break: break-all;
    font-family: 'Roboto Mono', monospace;
    font-size: 12px;
    background-color: rgb(var(--mdui-color-surface));
    padding: 12px;
    border-radius: 8px;
    margin-top: 8px;
}

.message.error {
    background-color: rgb(var(--mdui-color-error-container));
    color: rgb(var(--mdui-color-on-error-container));
}

.message.success {
    background-color: rgb(var(--mdui-color-primary-container));
    color: rgb(var(--mdui-color-on-primary-container));
}

/* ================== App Container ================== */
.app-container {
    display: flex;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
}

/* ================== Sidebar ================== */
.sidebar {
    width: var(--app-sidebar-width);
    background-color: rgb(var(--mdui-color-surface-container-low));
    border-right: 1px solid rgb(var(--mdui-color-outline-variant));
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: transform 0.3s ease;
    z-index: 100;
}

.sidebar-header {
    height: 64px;
    display: flex;
    align-items: center;
    padding: 0 16px;
    font-size: 20px;
    font-weight: 700;
    color: rgb(var(--mdui-color-on-surface));
    border-bottom: 1px solid rgb(var(--mdui-color-outline-variant));
    gap: 12px;
    cursor: pointer;
}

.sidebar-header img {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.channel-list {
    flex: 1;
    overflow-y: auto;
    padding: 12px 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.channel-item {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    color: rgb(var(--mdui-color-on-surface-variant));
    text-decoration: none;
    gap: 12px;
}

.channel-item:hover {
    background-color: rgb(var(--mdui-color-surface-container-highest));
    color: rgb(var(--mdui-color-on-surface));
}

.channel-item.active {
    background-color: rgb(var(--mdui-color-secondary-container));
    color: rgb(var(--mdui-color-on-secondary-container));
    font-weight: 600;
}

.channel-icon {
    font-size: 20px;
}

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

.channel-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 15px;
}

.user-profile-section {
    padding: 12px 16px;
    background-color: rgb(var(--mdui-color-surface-container));
    border-top: 1px solid rgb(var(--mdui-color-outline-variant));
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgb(var(--mdui-color-primary-container));
    color: rgb(var(--mdui-color-on-primary-container));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
}

.user-details {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.user-name {
    font-size: 14px;
    font-weight: 600;
    color: rgb(var(--mdui-color-on-surface));
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-status {
    font-size: 12px;
}

.user-status.connected {
    color: rgb(var(--mdui-color-primary));
}

.user-status.disconnected {
    color: rgb(var(--mdui-color-error));
}

.user-status.connecting {
    color: rgb(var(--mdui-color-secondary));
}


/* ================== Main Chat Area ================== */
.main-chat {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: rgb(var(--mdui-color-surface));
    min-width: 0;
    position: relative;
    /* 防止 absolute FAB 定位出错 */
}

.chat-body-wrapper {
    display: flex;
    flex-direction: row;
    /* Default Row, right side hidden in chat mode */
    flex: 1;
    min-height: 0;
    position: relative;
}

.chat-main-column {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
    min-height: 0;
    position: relative;
}

.chat-header {
    height: 64px;
    display: flex;
    align-items: center;
    padding: 0 24px;
    border-bottom: 1px solid rgb(var(--mdui-color-outline-variant));
    background-color: rgb(var(--mdui-color-surface));
    gap: 16px;
}

.menu-toggle {
    display: none;
}

.chat-title-info {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 12px;
    overflow: hidden;
}

.chat-title-icon {
    color: rgb(var(--mdui-color-on-surface-variant));
}

.chat-title-text {
    font-size: 18px;
    font-weight: 700;
    color: rgb(var(--mdui-color-on-surface));
    white-space: nowrap;
}

.chat-topic {
    font-size: 14px;
    color: rgb(var(--mdui-color-on-surface-variant));
    margin-left: 8px;
    padding-left: 16px;
    border-left: 1px solid rgb(var(--mdui-color-outline-variant));
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ================== General Messages Styling (Chat Mode Default) ================== */
.messages-area {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    background-color: rgb(var(--mdui-color-surface));
    position: relative;
}

.message-group {
    display: flex;
    gap: 16px;
    max-width: 100%;
}

.msg-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.msg-avatar:hover {
    transform: scale(1.05);
}

.msg-content-wrapper {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.msg-header {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 4px;
}

.msg-author {
    font-size: 15px;
    font-weight: 600;
    color: rgb(var(--mdui-color-on-surface));
    cursor: pointer;
}

.msg-author:hover {
    text-decoration: underline;
}

.msg-time {
    font-size: 12px;
    color: rgb(var(--mdui-color-on-surface-variant));
}

.msg-bubble {
    font-size: 15px;
    line-height: 1.5;
    color: rgb(var(--mdui-color-on-surface));
    word-break: break-word;
    width: 100%;
}

.msg-bubble p {
    margin: 0 0 8px 0;
}

.msg-bubble p:last-child {
    margin-bottom: 0;
}

.msg-title {
    font-weight: bold;
    font-size: 16px;
    margin-bottom: 6px;
    color: rgb(var(--mdui-color-primary));
}

.msg-actions {
    margin-top: 6px;
    display: flex;
    gap: 8px;
}

.message-like {
    font-size: 13px;
    background-color: rgb(var(--mdui-color-surface-container-high));
    padding: 2px 8px;
    border-radius: 12px;
    color: rgb(var(--mdui-color-on-surface-variant));
    cursor: pointer;
}

/* Reference HTML */
.msg-reference {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
    font-size: 13px;
    color: rgb(var(--mdui-color-on-surface-variant));
    position: relative;
}

.msg-reference::before {
    content: '';
    position: absolute;
    left: -28px;
    top: 50%;
    width: 24px;
    height: 24px;
    border-left: 2px solid rgb(var(--mdui-color-outline-variant));
    border-top: 2px solid rgb(var(--mdui-color-outline-variant));
    border-top-left-radius: 8px;
    transform: translateY(-100%);
}

.msg-reference-author {
    font-weight: 600;
}

.msg-reference-text {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 300px;
}

/* ================== Forum Mode Styling ================== */
.forum-mode .messages-area {
    background-color: rgb(var(--mdui-color-surface-container-lowest));
    padding: 16px max(16px, calc((100% - 900px) / 2));
    /* 居中限宽排版 */
    gap: 16px;
}

.forum-mode .message-group {
    background-color: rgb(var(--mdui-color-surface));
    border: 1px solid rgb(var(--mdui-color-outline-variant));
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    /* 传统卡片阴影感 */
    flex-direction: column;
    /* 论坛头像和内容通常分离 */
}

/* 在论坛模式下，头像信息作为顶部独立的 header */
.forum-mode .msg-header {
    border-bottom: 1px solid rgb(var(--mdui-color-outline-variant));
    padding-bottom: 12px;
    margin-bottom: 12px;
    width: 100%;
}

.forum-mode .msg-header::before {
    content: '';
    /* 将头像移入头部 */
}

/* 隐藏聊天模式特定的左侧引用划线 */
.forum-mode .msg-reference::before {
    display: none;
}

.forum-mode .msg-reference {
    background-color: rgb(var(--mdui-color-surface-container-high));
    padding: 8px 12px;
    border-radius: 8px;
    margin-bottom: 12px;
}

/* ---------------- 三栏布局: 帖子发布区 ---------------- */
.forum-post-editor-area {
    display: none;
    width: 320px;
    border-left: 1px solid rgb(var(--mdui-color-outline-variant));
    background-color: rgb(var(--mdui-color-surface-container-low));
    padding: 24px;
    flex-direction: column;
    overflow-y: auto;
    flex-shrink: 0;
}

.editor-header {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    color: rgb(var(--mdui-color-on-surface));
}

.forum-mobile-fab {
    display: none;
    position: absolute;
    right: 24px;
    bottom: 24px;
    z-index: 100;
}

/* 布局控制逻辑 */
/* In forum mode, the logic is simply hiding the input area and showing the right area */
.forum-mode .chat-input-area {
    display: none;
    /* 在论坛模式中隐藏通用底部输入框 */
}

@media (min-width: 841px) {
    .forum-mode .forum-post-editor-area {
        display: flex;
    }
}

@media (max-width: 840px) {
    .forum-mode .forum-mobile-fab {
        display: inline-flex;
    }
}

/* ================== Chat Input Area ================== */
.chat-input-area {
    padding: 0 24px 24px;
    background-color: rgb(var(--mdui-color-surface));
}

.input-bar {
    display: flex;
    align-items: center;
    background-color: rgb(var(--mdui-color-surface-container-high));
    border-radius: 12px;
    padding: 8px 16px;
    gap: 12px;
    transition: background-color 0.2s ease;
}

.input-bar:focus-within {
    background-color: rgb(var(--mdui-color-surface-container-highest));
}

.input-bar mdui-text-field {
    flex: 1;
    --shape-corner: 8px;
}

mdui-text-field::part(container) {
    background: transparent !important;
}

.typing-status {
    font-size: 12px;
    color: rgb(var(--mdui-color-on-surface-variant));
    padding-left: 16px;
    padding-top: 8px;
    height: 20px;
    display: none;
    /* 按照用户要求隐藏 */
}

/* ================== Markdown ================== */
.markdown-content pre {
    background-color: rgb(var(--mdui-color-surface-container-high));
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
}

.markdown-content code {
    background-color: rgb(var(--mdui-color-surface-container-high));
    padding: 2px 6px;
    border-radius: 4px;
}

.markdown-content img {
    max-width: 100%;
    border-radius: 8px;
}

/* ================== Modals & Overlays ================== */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 90;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.new-message-indicator {
    position: absolute;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: none;
}

/* Debug */
.debug-panel {
    position: fixed;
    bottom: 16px;
    right: 16px;
    background: rgb(var(--mdui-color-surface));
    padding: 16px;
    border-radius: 12px;
    max-width: 400px;
    max-height: 300px;
    overflow-y: auto;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    border: 1px solid rgb(var(--mdui-color-outline-variant));
    display: none;
    z-index: 1000;
}

/* ================== Responsive ================== */
@media (max-width: 840px) {
    .sidebar {
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-overlay.open {
        display: block;
        opacity: 1;
    }

    .menu-toggle {
        display: block;
    }

    .chat-topic {
        display: none;
    }

    .messages-area {
        padding: 16px;
    }

    .chat-input-area {
        padding: 0 16px 16px;
    }
}