:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-sidebar: #0f0f23;
    --bg-input: #1e1e3a;
    --bg-user-msg: #2d2d5e;
    --bg-hover: #252550;
    --text-primary: #e8e8f0;
    --text-secondary: #a0a0c0;
    --text-muted: #6a6a8a;
    --accent: #4f6ef7;
    --accent-hover: #6b85ff;
    --border: #2a2a4a;
    --danger: #e0556a;
    --success: #4caf84;
    --radius: 12px;
    --radius-sm: 8px;
}

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

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

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

/* Auth */
.auth-container {
    display: flex; align-items: center; justify-content: center; min-height: 100vh;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f0f23 100%);
}
.auth-card {
    background: var(--bg-secondary); border: 1px solid var(--border);
    border-radius: 16px; padding: 40px; width: 400px; max-width: 90vw;
    box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}
.auth-card h1 { text-align: center; margin-bottom: 8px; font-size: 28px; }
.auth-card .subtitle { text-align: center; color: var(--text-secondary); margin-bottom: 32px; font-size: 14px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 14px; color: var(--text-secondary); }
.form-group input {
    width: 100%; padding: 12px 16px; background: var(--bg-input);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    color: var(--text-primary); font-size: 15px; outline: none; transition: border-color 0.2s;
}
.form-group input:focus { border-color: var(--accent); }
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 24px; border: none; border-radius: var(--radius-sm);
    font-size: 15px; cursor: pointer; transition: all 0.2s; font-weight: 500;
}
.btn-primary { background: var(--accent); color: #fff; width: 100%; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.9; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text-primary); }
.btn-outline:hover { background: var(--bg-hover); }
.auth-footer { text-align: center; margin-top: 20px; font-size: 14px; color: var(--text-secondary); }
.error-msg {
    background: rgba(224,85,106,0.15); color: var(--danger);
    padding: 10px 16px; border-radius: var(--radius-sm); margin-bottom: 16px;
    font-size: 14px; display: none;
}
.error-msg.show { display: block; }

/* Layout */
.app-layout { display: flex; height: 100vh; }

/* Top navigation bar (150x50 buttons) */
.main-area { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.top-nav {
    display: flex; gap: 8px;
    padding: 12px 24px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.top-nav-btn {
    width: 150px; height: 50px;
    background: var(--bg-input); border: 1px solid var(--border);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer; font-size: 15px; font-weight: 500;
    transition: all 0.2s;
    display: flex; align-items: center; justify-content: center; gap: 6px;
}
.top-nav-btn:hover {
    background: var(--bg-hover); color: var(--text-primary);
    border-color: var(--accent);
}
.top-nav-btn.active {
    background: var(--accent); color: #fff;
    border-color: var(--accent);
    box-shadow: 0 2px 8px rgba(79,110,247,0.3);
}

/* Sidebar */
.sidebar {
    width: 280px; min-width: 200px; max-width: 500px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex; flex-direction: column; height: 100vh;
    position: relative; flex-shrink: 0;
    transition: width 0s; /* width is set directly by JS during drag */
}
/* Drag-to-resize handle on the right edge of the sidebar */
.sidebar-resize-handle {
    position: absolute; right: -3px; top: 0; bottom: 0; width: 6px;
    cursor: ew-resize; z-index: 5;
    background: transparent;
    transition: background 0.15s;
}
.sidebar-resize-handle:hover, .sidebar-resize-handle.dragging {
    background: var(--accent);
    opacity: 0.5;
}
.sidebar-header { padding: 16px; border-bottom: 1px solid var(--border); }
.sidebar-header .logo { font-size: 18px; font-weight: 700; display: flex; align-items: center; gap: 8px; }

/* Sidebar tabs (纯文本 / 图片 / 视频) */
.sidebar-tabs {
    display: flex; gap: 4px;
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-sidebar);
    flex-shrink: 0;
}
.sidebar-tab {
    flex: 1; padding: 8px 4px;
    background: transparent; border: 1px solid transparent;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    cursor: pointer; font-size: 13px;
    transition: all 0.15s;
}
.sidebar-tab:hover {
    background: var(--bg-hover); color: var(--text-primary);
}
.sidebar-tab.active {
    background: var(--accent); color: #fff;
    border-color: var(--accent);
}
.sidebar-content {
    flex: 1; display: flex; flex-direction: column;
    overflow: hidden;
}
.sidebar-pane {
    flex: 1; display: flex; flex-direction: column;
    overflow: hidden;
}
.sidebar-placeholder {
    padding: 32px 16px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
}
.sidebar-video-tools {
    padding: 12px 16px 8px;
    display: flex; flex-direction: column; gap: 6px;
}
.sidebar-batch-bar {
    display: flex; align-items: center; gap: 8px;
    padding: 6px 8px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 12px;
}
.sidebar-batch-selectall {
    display: flex; align-items: center; gap: 4px; cursor: pointer;
    color: var(--text-secondary);
    user-select: none;
}
.sidebar-batch-selectall input { cursor: pointer; }
.sidebar-batch-count {
    flex: 1; text-align: right;
    color: var(--text-muted); font-size: 11px;
    font-family: 'Fira Code','Consolas',monospace;
}
#sidebarBatchDlBtn {
    padding: 4px 10px; font-size: 12px;
}
#sidebarBatchDlBtn:disabled {
    opacity: 0.5; cursor: not-allowed;
}
.seedance-sidebar-item-check {
    flex-shrink: 0; width: 14px; align-self: center;
    display: flex; align-items: center; justify-content: center;
    padding-left: 2px;
}
.seedance-sidebar-item-check input {
    cursor: pointer; width: 14px; height: 14px;
    margin: 0;
}
.seedance-sidebar-item.is-selected {
    border-color: var(--accent);
    background: var(--bg-hover);
}
.sidebar-view-all {
    display: flex; align-items: center; gap: 6px;
    font-size: 12px; color: var(--text-secondary); cursor: pointer;
    padding: 4px 0;
    border-bottom: 1px dashed var(--border);
    margin-bottom: 4px;
}
.sidebar-view-all input { cursor: pointer; }

/* Sidebar video record list */
.seedance-sidebar-list {
    flex: 1; overflow-y: auto; padding: 0 8px 8px;
}
.seedance-sidebar-item {
    display: flex; align-items: stretch; gap: 8px;
    padding: 8px; margin-bottom: 6px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
    overflow: hidden;
}
.seedance-sidebar-item:hover {
    background: var(--bg-hover);
    border-color: var(--accent);
}

/* Three-line layout shared by seedance + image sidebars. The meta
   container is a vertical flex; line 1 holds the meta tags, line 2
   is the prompt (single-line, ellipsised), line 3 is the timestamp. */
.seedance-sidebar-meta {
    display: flex; flex-direction: column;
    gap: 2px; min-width: 0; flex: 1; line-height: 1.4;
}
.seedance-sidebar-line1 {
    font-size: 12px; color: var(--text-primary);
    display: flex; flex-wrap: wrap; gap: 4px; align-items: center;
}
.seedance-sidebar-line1 .seedance-history-status {
    font-size: 11px; padding: 1px 6px;
}
.seedance-sidebar-elapsed[data-running="1"] {
    color: var(--accent);
    font-variant-numeric: tabular-nums;
}
.seedance-sidebar-line2 {
    font-size: 13px; color: var(--text-primary);
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.seedance-sidebar-line3 {
    font-size: 11px; color: var(--text-muted);
    display: flex; align-items: center; gap: 4px;
}
/* 5. Video thumbnail at the front */
.seedance-sidebar-thumb {
    flex-shrink: 0; width: 64px; height: 64px;
    border-radius: 4px; background: #000;
    display: flex; align-items: center; justify-content: center;
    overflow: hidden; position: relative;
    cursor: pointer;
}
.seedance-sidebar-thumb img,
.seedance-sidebar-thumb video {
    width: 100%; height: 100%; object-fit: cover;
    display: block;
}
.seedance-sidebar-thumb .thumb-placeholder {
    color: #fff; font-size: 11px; opacity: 0.6;
    text-align: center; padding: 2px;
}
.seedance-sidebar-thumb .thumb-play-icon {
    position: absolute; inset: 0;
    display: flex; align-items: center; justify-content: center;
    background: rgba(0,0,0,0.35); color: #fff; font-size: 18px;
    opacity: 0; transition: opacity 0.15s;
    pointer-events: none;
}
.seedance-sidebar-thumb:hover .thumb-play-icon { opacity: 1; }
/* Lazy-loaded thumbnails (no src yet): keep a small persistent play badge
   so the user can tell the cell is clickable, even before the video frame
   is fetched. Without this the 64x64 cell would just look like a black box. */
.seedance-sidebar-thumb-lazy .thumb-play-icon {
    opacity: 0.55;
    background: rgba(0,0,0,0.25);
    font-size: 14px;
}
.seedance-sidebar-thumb-lazy:hover .thumb-play-icon { opacity: 1; }
.seedance-sidebar-info {
    flex: 1; min-width: 0;
    display: flex; flex-direction: column; gap: 2px;
    font-size: 12px; line-height: 1.4;
}
.seedance-sidebar-row {
    display: flex; align-items: center; gap: 4px; flex-wrap: wrap;
    color: var(--text-secondary);
}
.seedance-sidebar-status {
    padding: 1px 6px; border-radius: 8px; font-size: 11px;
    background: var(--bg-input);
}
.seedance-sidebar-status.status-succeeded,
.seedance-sidebar-status.status-success { color: var(--success); border: 1px solid var(--success); }
.seedance-sidebar-status.status-failed { color: var(--danger); border: 1px solid var(--danger); }
.seedance-sidebar-status.status-running,
.seedance-sidebar-status.status-in_progress { color: var(--accent); border: 1px solid var(--accent); }
.seedance-sidebar-status.status-queued,
.seedance-sidebar-status.status-pending { color: var(--text-muted); border: 1px solid var(--text-muted); }
.seedance-sidebar-status.status-expired { color: #f59e0b; border: 1px solid #f59e0b; }
.seedance-sidebar-taskid {
    font-family: 'Fira Code','Consolas',monospace;
    font-size: 11px; color: var(--text-muted);
    word-break: break-all; line-height: 1.3;
}
.seedance-sidebar-date {
    font-size: 11px; color: var(--text-muted);
    font-family: 'Fira Code','Consolas',monospace;
}
.seedance-sidebar-saved {
    font-size: 11px;
}
/* NOTE: the absolute-positioned override below is the one actually used
   by both the video and image sidebars (the .seedance-sidebar-saved span
   lives inside .seedance-sidebar-thumb, which is position:relative). */
.seedance-sidebar-actions {
    display: flex; flex-direction: column; gap: 2px; flex-shrink: 0;
    align-items: center; justify-content: center;
}
.seedance-sidebar-download-group {
    display: flex; flex-direction: column; align-items: center; gap: 2px;
}
.seedance-sidebar-download {
    width: 26px; height: 26px;
    background: var(--bg-input); border: 1px solid var(--border);
    color: var(--accent); border-radius: 4px;
    cursor: pointer; font-size: 14px;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.15s;
}
.seedance-sidebar-download:hover {
    background: var(--accent); color: #fff; border-color: var(--accent);
}
.seedance-sidebar-download-count {
    font-size: 10px; color: var(--text-muted);
    line-height: 1; font-family: 'Fira Code','Consolas',monospace;
}
.seedance-sidebar-empty {
    padding: 24px 8px; text-align: center;
    color: var(--text-muted); font-size: 12px;
}
/* Image sidebar uses the same wrapper as seedance. The thumbnail is
   an <img>, not a <video>, so we make sure it fills the 64x64 box. */
.seedance-sidebar-thumb img {
    width: 100%; height: 100%; object-fit: cover; display: block;
}
/* Image-count badge in the sidebar (e.g. "4图") */
.seedance-sidebar-badge {
    position: absolute;
    bottom: 2px; right: 2px;
    background: rgba(0,0,0,0.65);
    color: #fff;
    font-size: 10px;
    padding: 1px 5px;
    border-radius: 8px;
    line-height: 1.2;
    pointer-events: none;
}
/* Image dimension badge in the detail modal (e.g. "2048×1152") */
.seedance-history-dim {
    position: absolute;
    top: 6px; right: 6px;
    background: rgba(0,0,0,0.6);
    color: #fff;
    font-size: 11px;
    padding: 2px 6px;
    border-radius: 6px;
    line-height: 1.2;
    pointer-events: none;
}
/* Image-record detail media item: thumbnail block + actions row below
   it (so the buttons never cover the picture). */
.seedance-history-media-item {
    display: flex; flex-direction: column;
    gap: 6px;
    margin-bottom: 12px;
}
.seedance-history-media-item .seedance-history-media-thumb {
    margin: 0;
    width: 100%;
    padding: 0;
    border: 0;
    background: transparent;
    align-items: stretch;
}
.seedance-history-media-actions {
    display: flex; flex-wrap: wrap; gap: 6px;
    justify-content: flex-start;
}
.seedance-history-media-caption {
    font-size: 12px; color: var(--text-muted);
    text-align: center;
}
/* Detail-modal image: full-width, capped to viewport height, the
   picture shows in its natural aspect ratio and is not cropped. */
.seedance-detail-image {
    display: block;
    width: 100%;
    max-height: 80vh;
    object-fit: contain;
    background: var(--bg-secondary, #111);
    border-radius: 4px;
    cursor: zoom-in;
}
/* 💾 "saved to local" badge in the sidebar thumbnail. */
.seedance-sidebar-saved {
    position: absolute;
    top: 2px; right: 2px;
    background: rgba(0,0,0,0.55);
    border-radius: 6px;
    font-size: 12px;
    padding: 1px 4px;
    pointer-events: none;
    line-height: 1.2;
    z-index: 2;
}
/* Per-record download button (mirrors seedance sidebar style). */
.seedance-sidebar-download-group {
    display: inline-flex; align-items: center; gap: 4px;
    margin-left: auto;
    font-size: 11px; color: var(--text-muted);
}
.seedance-sidebar-download {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
    width: 22px; height: 22px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px; line-height: 1;
    padding: 0;
    display: inline-flex; align-items: center; justify-content: center;
}
.seedance-sidebar-download:hover:not(:disabled) {
    background: var(--bg-hover);
    border-color: var(--accent);
}
.seedance-sidebar-download-count { white-space: nowrap; }
.new-chat-btn {
    margin: 12px 16px; padding: 10px 16px; background: var(--accent); color: #fff;
    border: none; border-radius: var(--radius-sm); cursor: pointer; font-size: 14px;
    display: flex; align-items: center; gap: 8px; width: calc(100% - 32px); transition: background 0.2s;
}
.new-chat-btn:hover { background: var(--accent-hover); }
.conversation-list { flex: 1; overflow-y: auto; padding: 8px; }
.conversation-list::-webkit-scrollbar { width: 4px; }
.conversation-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
.conv-item {
    display: flex; align-items: center; gap: 6px;
    padding: 10px 12px; border-radius: var(--radius-sm); cursor: pointer;
    transition: background 0.15s; margin-bottom: 2px;
}
.conv-item:hover { background: var(--bg-hover); }
.conv-item.active { background: var(--bg-hover); border: 1px solid var(--border); }
.conv-item .conv-title {
    flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
    font-size: 14px; color: var(--text-secondary);
    user-select: none;
}
.conv-item.active .conv-title { color: var(--text-primary); }
.conv-title-input {
    flex: 1; min-width: 0;
    background: var(--bg-input); color: var(--text-primary);
    border: 1px solid var(--accent); border-radius: 3px;
    padding: 4px 6px; font-size: 13px; outline: none;
    font-family: inherit;
}
.conv-item.editing { background: var(--bg-input); cursor: text; }
.conv-item.editing .conv-rename,
.conv-item.editing .conv-del { display: none; }
.conv-rename, .conv-del {
    flex-shrink: 0; width: 22px; height: 22px;
    display: flex; align-items: center; justify-content: center;
    background: none; border: none; color: var(--text-muted);
    cursor: pointer; padding: 0; border-radius: 4px;
    font-size: 13px; opacity: 0; transition: opacity 0.15s, color 0.15s, background 0.15s;
}
.conv-item:hover .conv-rename,
.conv-item:hover .conv-del,
.conv-item.active .conv-rename,
.conv-item.active .conv-del { opacity: 1; }
.conv-rename:hover { color: #fff; background: var(--accent); }
.conv-del:hover { color: #fff; background: var(--danger); }
.sidebar-footer {
    padding: 12px 16px; border-top: 1px solid var(--border);
    display: flex; align-items: center; justify-content: space-between;
}
.user-info { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-secondary); }
.user-avatar {
    width: 32px; height: 32px; border-radius: 50%; background: var(--accent);
    display: flex; align-items: center; justify-content: center; color: #fff;
    font-weight: 600; font-size: 14px;
}
.admin-link { color: var(--accent); font-size: 13px; cursor: pointer; }
.logout-btn {
    background: none; border: none; color: var(--text-muted);
    cursor: pointer; font-size: 13px; padding: 4px 8px; border-radius: 4px;
}
.logout-btn:hover { color: var(--danger); background: rgba(224,85,106,0.1); }

/* Chat Main */
.chat-main { flex: 1; display: flex; flex-direction: column; background: var(--bg-primary); overflow: hidden; min-height: 0; }
.main-view { flex: 1; display: flex; flex-direction: column; overflow: auto; min-height: 0; }
.chat-header {
    padding: 12px 24px; border-bottom: 1px solid var(--border);
    display: flex; align-items: center; justify-content: space-between;
}
.chat-header .model-selector { display: flex; align-items: center; gap: 8px; }
.chat-header select {
    background: var(--bg-input); border: 1px solid var(--border);
    border-radius: var(--radius-sm); color: var(--text-primary);
    padding: 6px 12px; font-size: 13px; outline: none; cursor: pointer;
}
.chat-header select:focus { border-color: var(--accent); }
.chat-messages {
    flex: 1; overflow-y: auto; padding: 24px;
    display: flex; flex-direction: column; gap: 24px;
}
.chat-messages::-webkit-scrollbar { width: 6px; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
.welcome-screen {
    flex: 1; display: flex; flex-direction: column; align-items: center;
    justify-content: center; color: var(--text-secondary); text-align: center; padding: 40px;
}
.welcome-screen h2 { font-size: 28px; color: var(--text-primary); margin-bottom: 12px; }
.welcome-screen p { font-size: 15px; max-width: 500px; line-height: 1.6; }

/* Messages */
.message {
    display: flex; gap: 12px; max-width: 1200px; width: 100%;
    margin: 0 auto; padding: 4px 0;
    box-sizing: border-box;
}
/* User messages align to the right; AI messages align to the left */
.message.user { justify-content: flex-end; }
.message.assistant { justify-content: flex-start; }
.message-avatar {
    width: 36px; height: 36px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center; font-size: 16px; flex-shrink: 0;
}
.message.user .message-avatar { background: var(--accent); color: #fff; }
.message.assistant .message-avatar { background: #1e3a5f; color: #4f9eff; }
.message-content {
    padding: 12px 16px; border-radius: var(--radius);
    font-size: 15px; line-height: 1.7; word-break: break-word; white-space: pre-wrap;
    max-width: 75%;
}
.message.user .message-content {
    background: var(--bg-user-msg);
    border-radius: var(--radius) 4px var(--radius) var(--radius);
    text-align: left; /* keep text left-aligned inside the bubble */
}
.message.assistant .message-content { background: transparent; max-width: 85%; }
.message-content code {
    background: rgba(0,0,0,0.3); padding: 2px 6px; border-radius: 4px;
    font-size: 13px; font-family: 'Fira Code','Consolas',monospace;
}
.message-content pre {
    background: #0d0d1a; padding: 16px; border-radius: var(--radius-sm);
    overflow-x: auto; margin: 8px 0; border: 1px solid var(--border);
}
.message-content pre code { background: none; padding: 0; }

/* Thinking / reasoning block (DeepSeek chain-of-thought) */
.message-thinking {
    margin: 4px 0 8px;
    border: 1px dashed rgba(120, 200, 255, 0.35);
    border-left: 3px solid var(--accent);
    background: rgba(40, 80, 130, 0.08);
    border-radius: 6px;
    font-size: 13px;
    line-height: 1.6;
    color: var(--text-secondary);
    overflow: hidden;
}
.message-thinking-header {
    display: flex; align-items: center; gap: 6px;
    padding: 6px 10px;
    cursor: pointer;
    user-select: none;
    font-weight: 600;
    color: var(--accent);
    font-size: 12px;
    background: rgba(40, 80, 130, 0.15);
}
.message-thinking-header:hover { background: rgba(40, 80, 130, 0.25); }
.message-thinking-icon {
    display: inline-block; transition: transform 0.2s; font-size: 11px;
}
.message-thinking.is-expanded .message-thinking-icon { transform: rotate(90deg); }
.message-thinking-spinner {
    width: 10px; height: 10px; border-radius: 50%;
    border: 2px solid rgba(120, 200, 255, 0.3);
    border-top-color: var(--accent);
    animation: spin 0.8s linear infinite;
    display: inline-block;
}
.message-thinking-body {
    display: none;
    padding: 8px 12px 10px;
    white-space: pre-wrap;
    word-break: break-word;
    font-family: 'Fira Code','Consolas',monospace;
    font-size: 12px;
    max-height: 360px;
    overflow-y: auto;
}
.message-thinking.is-expanded .message-thinking-body { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Typing */
.typing-indicator { display: flex; gap: 4px; padding: 8px 0; }
.typing-indicator span {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--text-muted); animation: typing 1.4s infinite;
}
.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing {
    0%, 60%, 100% { opacity: 0.3; transform: scale(0.8); }
    30% { opacity: 1; transform: scale(1); }
}

/* Input */
.chat-input-area { padding: 16px 24px 24px; }
.chat-input-container {
    max-width: 1200px; margin: 0 auto; display: flex; gap: 12px;
    background: var(--bg-input); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 8px 16px; transition: border-color 0.2s;
    position: relative;
}
.chat-input-container:focus-within { border-color: var(--accent); }
.chat-input-container textarea {
    flex: 1; background: none; border: none; color: var(--text-primary);
    font-size: 15px; outline: none; padding: 8px 0;
    height: 40px; min-height: 40px; max-height: 600px;
    font-family: inherit; line-height: 1.5;
    overflow-y: auto; overflow-x: hidden;
    resize: none;
}
.chat-input-container textarea::placeholder { color: var(--text-muted); }
/* Custom resize handle at bottom-right */
.chat-input-container .resize-handle {
    position: absolute; right: 4px; bottom: 4px;
    width: 14px; height: 14px;
    cursor: ns-resize; opacity: 0.45;
    background:
        linear-gradient(135deg, transparent 0%, transparent 35%, var(--text-secondary) 35%, var(--text-secondary) 50%, transparent 50%, transparent 65%, var(--text-secondary) 65%, var(--text-secondary) 80%, transparent 80%);
    transition: opacity 0.2s;
    pointer-events: auto;
}
.chat-input-container .resize-handle:hover { opacity: 0.85; }
.send-btn {
    background: var(--accent); border: none; color: #fff; width: 40px; height: 40px;
    border-radius: 50%; cursor: pointer; display: flex; align-items: center;
    justify-content: center; flex-shrink: 0; align-self: flex-end; transition: background 0.2s;
}
.send-btn:hover { background: var(--accent-hover); }
.send-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.stop-btn {
    background: #ef4444; border: none; color: #fff; width: 40px; height: 40px;
    border-radius: 50%; cursor: pointer; display: inline-flex; align-items: center;
    justify-content: center; flex-shrink: 0; align-self: flex-end;
    transition: background 0.2s; margin-left: 6px;
}
.stop-btn:hover { background: #dc2626; }

/* Admin */
.admin-layout { display: flex; height: 100vh; }
.admin-sidebar {
    width: 240px; min-width: 240px; background: var(--bg-sidebar);
    border-right: 1px solid var(--border); display: flex; flex-direction: column;
}
.admin-sidebar .logo { padding: 20px; font-size: 18px; font-weight: 700; border-bottom: 1px solid var(--border); }
.admin-nav { flex: 1; padding: 12px; }
.admin-nav-item {
    display: flex; align-items: center; gap: 10px; padding: 12px 16px;
    border-radius: var(--radius-sm); cursor: pointer; color: var(--text-secondary);
    font-size: 14px; transition: all 0.15s; margin-bottom: 4px;
}
.admin-nav-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.admin-nav-item.active { background: var(--accent); color: #fff; }
.admin-nav-item .badge {
    margin-left: auto; background: rgba(255,255,255,0.2);
    padding: 2px 8px; border-radius: 10px; font-size: 12px;
}
.admin-main { flex: 1; overflow-y: auto; padding: 32px; }
.admin-main h2 { font-size: 24px; margin-bottom: 24px; }
.admin-table {
    width: 100%; border-collapse: collapse; background: var(--bg-secondary);
    border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border);
}
.admin-table th, .admin-table td {
    padding: 12px 16px; text-align: left; font-size: 14px; border-bottom: 1px solid var(--border);
}
.admin-table th {
    background: var(--bg-sidebar); color: var(--text-secondary);
    font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: 0.5px;
}
.admin-table tr:hover td { background: var(--bg-hover); }
.admin-table .view-link { color: var(--accent); cursor: pointer; font-size: 13px; }
.admin-table .view-link:hover { text-decoration: underline; }
.admin-form {
    background: var(--bg-secondary); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px; max-width: 600px;
}
.admin-form .form-group { margin-bottom: 16px; }
.admin-form .form-group label { display: block; margin-bottom: 6px; font-size: 14px; color: var(--text-secondary); }
.admin-form .form-group input, .admin-form .form-group select {
    width: 100%; padding: 10px 14px; background: var(--bg-input);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    color: var(--text-primary); font-size: 14px; outline: none;
}
.admin-form .form-group input:focus, .admin-form .form-group select:focus { border-color: var(--accent); }
.admin-form .btn { width: auto; }
.seedance-detail-modal {
    max-width: 900px; width: 90vw;
    max-height: 90vh; overflow: hidden;
    display: flex; flex-direction: column;
}
.seedance-detail-body {
    flex: 1; overflow-y: auto; padding: 0 4px;
}
.seedance-detail-modal .seedance-history-row {
    display: flex; gap: 12px; padding: 8px 0;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
}
.seedance-detail-modal .seedance-history-row label {
    flex-shrink: 0; width: 100px; color: var(--text-secondary);
    font-weight: 500; font-size: 12px;
}
.seedance-detail-modal .seedance-history-row > span,
.seedance-detail-modal .seedance-history-row > div {
    flex: 1; word-break: break-word; color: var(--text-primary);
}
.seedance-player-modal {
    max-width: 90vw; max-height: 90vh; background: #111;
    color: #fff;
}
.seedance-player-modal .modal-close { color: #fff; }
.seedance-player-modal h3 { color: #fff; }
.modal-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.7); display: flex; align-items: center;
    justify-content: center; z-index: 1000;
}
.modal {
    background: var(--bg-secondary); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 32px; max-width: 700px; width: 90vw;
    max-height: 80vh; overflow-y: auto; position: relative;
}
.modal h3 { margin-bottom: 20px; font-size: 20px; }
.modal .conv-messages { max-height: 50vh; overflow-y: auto; }
.modal .conv-message { padding: 10px 0; border-bottom: 1px solid var(--border); }
.modal .conv-message .role { font-size: 12px; color: var(--accent); margin-bottom: 4px; text-transform: uppercase; }
.modal .conv-message .content { font-size: 14px; line-height: 1.6; white-space: pre-wrap; }
.modal-close {
    position: absolute; top: 16px; right: 16px;
    background: none; border: none; color: var(--text-muted);
    font-size: 24px; cursor: pointer;
}
.modal-close:hover { color: var(--text-primary); }

/* Deep Think Toggle */
.deep-think-toggle {
    display: flex; align-items: center; gap: 8px; margin-left: 12px;
}
.deep-think-toggle label {
    display: flex; align-items: center; gap: 6px; cursor: pointer;
    font-size: 13px; color: var(--text-secondary); user-select: none;
}
.deep-think-toggle input[type="checkbox"] {
    width: 16px; height: 16px; accent-color: var(--accent); cursor: pointer;
}

/* Search Toggle */
.search-toggle {
    display: flex; align-items: center; gap: 8px;
}
.toggle-switch {
    position: relative; display: inline-block; width: 40px; height: 22px;
}
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
    position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--bg-input); border: 1px solid var(--border);
    border-radius: 22px; transition: 0.3s;
}
.toggle-slider::before {
    content: ""; position: absolute; height: 16px; width: 16px;
    left: 2px; bottom: 2px; background-color: var(--text-muted);
    border-radius: 50%; transition: 0.3s;
}
.toggle-switch input:checked + .toggle-slider {
    background-color: var(--accent); border-color: var(--accent);
}
.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(18px); background-color: #fff;
}

/* Quick Prompts */
.quick-prompts-bar {
    display: flex; gap: 8px; padding: 8px 24px; overflow-x: auto;
    border-top: 1px solid var(--border); flex-wrap: wrap;
}
.quick-prompt-chip {
    padding: 6px 14px; background: var(--bg-input); border: 1px solid var(--border);
    border-radius: 20px; font-size: 13px; color: var(--text-secondary);
    cursor: pointer; white-space: nowrap; transition: all 0.15s;
}
.quick-prompt-chip:hover { background: var(--bg-hover); color: var(--text-primary); border-color: var(--accent); }

/* Skills Panel */
.skills-panel {
    padding: 16px 24px; border-top: 1px solid var(--border);
}
.skills-panel h3 { font-size: 14px; color: var(--text-secondary); margin-bottom: 8px; }
.skill-tag {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 4px 12px; background: rgba(79,110,247,0.15); color: var(--accent);
    border-radius: 16px; font-size: 12px; margin: 0 4px 4px 0;
}
.skill-tag.inactive { opacity: 0.5; }

/* Memories Panel */
.memories-panel {
    padding: 16px 24px; border-top: 1px solid var(--border);
}
.memories-panel h3 { font-size: 14px; color: var(--text-secondary); margin-bottom: 8px; }
.memory-item {
    display: flex; align-items: center; gap: 8px; padding: 6px 0;
    font-size: 13px; color: var(--text-secondary);
}
.memory-item .mem-key { color: var(--accent); font-weight: 500; }

/* File Upload */
.file-upload-area {
    padding: 8px 24px; border-top: 1px solid var(--border);
    display: flex; align-items: center; gap: 8px;
}
.file-upload-btn {
    background: none; border: 1px dashed var(--border); color: var(--text-muted);
    padding: 6px 12px; border-radius: var(--radius-sm); cursor: pointer;
    font-size: 13px; display: flex; align-items: center; gap: 6px;
    transition: all 0.15s;
}
.file-upload-btn:hover { border-color: var(--accent); color: var(--accent); }
.file-upload-btn input[type="file"] { display: none; }
.uploaded-files { display: flex; gap: 6px; flex-wrap: wrap; }
.uploaded-file-chip {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 4px 10px; background: rgba(76,175,132,0.15); color: var(--success);
    border-radius: 12px; font-size: 12px;
}
.uploaded-file-chip .remove-file {
    cursor: pointer; font-size: 14px; line-height: 1;
}
.uploaded-file-chip .remove-file:hover { color: var(--danger); }

/* Settings Panel */
.settings-panel {
    padding: 16px 24px; border-top: 1px solid var(--border);
}
.settings-panel h3 { font-size: 14px; color: var(--text-secondary); margin-bottom: 12px; }
.settings-panel .form-group { margin-bottom: 12px; }
.settings-panel .form-group label { font-size: 13px; }
.settings-panel .form-group input {
    width: 100%; padding: 8px 12px; background: var(--bg-input);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    color: var(--text-primary); font-size: 14px; outline: none;
}
.settings-panel .form-group input:focus { border-color: var(--accent); }
.settings-panel .btn { width: auto; font-size: 13px; padding: 8px 16px; }

/* Settings button in sidebar */
.settings-btn {
    background: none; border: none; color: var(--text-muted);
    cursor: pointer; font-size: 13px; padding: 4px 8px; border-radius: 4px;
}
.settings-btn:hover { color: var(--accent); background: rgba(79,110,247,0.1); }

/* User management in admin */
.admin-table .btn-sm { margin-right: 4px; }

/* Prompt Dropdown in chat input */
.prompt-dropdown-wrapper {
    display: flex; align-items: center; gap: 4px; margin-right: 8px;
}
.prompt-dropdown {
    background: var(--bg-input); border: 1px solid var(--border);
    border-radius: var(--radius-sm); color: var(--text-primary);
    padding: 6px 10px; font-size: 13px; outline: none; cursor: pointer;
    max-width: 160px;
}
.prompt-dropdown:focus { border-color: var(--accent); }
.prompt-dropdown option { background: var(--bg-secondary); color: var(--text-primary); }
.prompt-manage-btn {
    background: none; border: 1px solid var(--border); color: var(--text-muted);
    cursor: pointer; font-size: 14px; padding: 4px 8px; border-radius: var(--radius-sm);
    transition: all 0.15s;
}
.prompt-manage-btn:hover { border-color: var(--accent); color: var(--accent); }

/* Input Options Bar (below chat input) */
.input-options-bar {
    display: flex; align-items: center; gap: 16px;
    padding: 8px 24px; max-width: 1200px; margin: 0 auto;
}
.input-options-bar .deep-think-toggle { margin-left: 0; }
.model-selector-inline {
    display: flex; align-items: center; gap: 6px;
}
.model-selector-inline select {
    background: var(--bg-input); border: 1px solid var(--border);
    border-radius: var(--radius-sm); color: var(--text-primary);
    padding: 4px 10px; font-size: 13px; outline: none; cursor: pointer;
}
.model-selector-inline select:focus { border-color: var(--accent); }

/* File upload area - inline in options bar */
.file-upload-area {
    display: flex; align-items: center; gap: 8px;
}
.file-upload-area .file-upload-btn {
    background: none; border: 1px dashed var(--border); color: var(--text-muted);
    padding: 4px 10px; border-radius: var(--radius-sm); cursor: pointer;
    font-size: 12px; display: flex; align-items: center; gap: 4px;
    transition: all 0.15s;
}
.file-upload-area .file-upload-btn:hover { border-color: var(--accent); color: var(--accent); }
.file-upload-area .file-upload-btn input[type="file"] { display: none; }
.file-upload-area .uploaded-files { display: flex; gap: 4px; flex-wrap: wrap; }
.file-upload-area .uploaded-file-chip {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 2px 8px; background: rgba(76,175,132,0.15); color: var(--success);
    border-radius: 10px; font-size: 11px;
}
.file-upload-area .uploaded-file-chip .remove-file {
    cursor: pointer; font-size: 12px; line-height: 1;
}
.file-upload-area .uploaded-file-chip .remove-file:hover { color: var(--danger); }

/* Reasoning block (thinking process) */
.reasoning-block {
    margin-bottom: 12px; border: 1px solid rgba(79,110,247,0.3);
    border-radius: var(--radius-sm); background: rgba(79,110,247,0.05);
    overflow: hidden;
}
.reasoning-block summary {
    padding: 8px 12px; cursor: pointer; font-size: 13px;
    color: var(--accent); font-weight: 500; user-select: none;
    display: flex; align-items: center; gap: 6px;
}
.reasoning-block summary:hover { background: rgba(79,110,247,0.08); }
.reasoning-block .reasoning-content {
    padding: 8px 12px 12px; font-size: 13px; color: var(--text-muted);
    line-height: 1.6; white-space: pre-wrap; border-top: 1px solid rgba(79,110,247,0.15);
    max-height: 300px; overflow-y: auto;
}

/* Prompt Manager Modal */
.prompt-manager-modal { max-width: 1200px; }
.prompt-manager-body { display: flex; gap: 24px; }
.prompt-manager-left { flex: 1; }
.prompt-manager-right { flex: 1; }
.prompt-manager-body h4 { font-size: 14px; color: var(--text-secondary); margin-bottom: 12px; }
.prompt-list { max-height: 300px; overflow-y: auto; }
.prompt-list-item {
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm);
    margin-bottom: 6px; cursor: pointer; transition: all 0.15s;
}
.prompt-list-item:hover { background: var(--bg-hover); }
.prompt-list-item.selected { border-color: var(--accent); background: rgba(79,110,247,0.1); }
.prompt-list-item .prompt-title { font-size: 14px; color: var(--text-primary); }
.prompt-list-item .prompt-preview { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.prompt-manager-right .form-group { margin-bottom: 12px; }
.prompt-manager-right .form-group label { font-size: 13px; color: var(--text-secondary); display: block; margin-bottom: 4px; }
.prompt-manager-right .form-group input,
.prompt-manager-right .form-group textarea {
    width: 100%; padding: 8px 12px; background: var(--bg-input);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    color: var(--text-primary); font-size: 14px; outline: none; resize: vertical;
}
.prompt-manager-right .form-group input:focus,
.prompt-manager-right .form-group textarea:focus { border-color: var(--accent); }
.prompt-manager-right .btn { width: 100%; font-size: 13px; padding: 8px 16px; }


/* ============================================================
   Seedance 2.0 Video Generation
   ============================================================ */
.seedance-bar {
    max-width: 1500px; margin: 8px auto 0; display: flex; gap: 8px;
}
.seedance-toggle-btn, .seedance-settings-btn {
    background: var(--bg-input); border: 1px solid var(--border);
    color: var(--text-secondary); padding: 8px 14px; border-radius: var(--radius-sm);
    cursor: pointer; font-size: 13px; transition: all 0.2s;
}
.seedance-toggle-btn:hover, .seedance-settings-btn:hover {
    background: var(--accent); color: #fff; border-color: var(--accent);
}
.seedance-panel {
    max-width: 1500px; margin: 8px auto 16px; background: var(--bg-secondary);
    border: 1px solid var(--border); border-radius: var(--radius); padding: 20px;
}
.seedance-panel-header {
    display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px;
}
.seedance-panel-header h3 { font-size: 16px; }
.seedance-panel-body .form-group { margin-bottom: 14px; }
.seedance-panel-body .form-group label {
    display: block; margin-bottom: 6px; font-size: 13px; color: var(--text-secondary);
}
.seedance-panel-body .form-group input,
.seedance-panel-body .form-group select,
.seedance-panel-body .form-group textarea {
    width: 100%; padding: 9px 12px; background: var(--bg-input);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    color: var(--text-primary); font-size: 14px; outline: none; font-family: inherit;
}
.seedance-panel-body .form-group textarea { resize: vertical; }
.seedance-panel-body .form-group input:focus,
.seedance-panel-body .form-group select:focus,
.seedance-panel-body .form-group textarea:focus { border-color: var(--accent); }
.seedance-media-list { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 6px; }
.seedance-params {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px;
}
.seedance-toggles {
    display: flex; flex-wrap: wrap; align-items: center; gap: 6px;
    margin-bottom: 16px; font-size: 13px; color: var(--text-secondary);
}
.seedance-generate-btn { width: 100%; margin-top: 8px; }
.seedance-task-area { margin-top: 16px; }
.seedance-status, .seedance-error {
    padding: 12px; border-radius: var(--radius-sm); font-size: 14px; text-align: center;
}
.seedance-status { background: var(--bg-input); color: var(--text-secondary); }
.seedance-error { background: rgba(224,85,106,0.12); color: var(--danger); }
.seedance-task-card {
    background: var(--bg-input); border: 1px solid var(--border);
    border-radius: var(--radius-sm); padding: 14px; margin-top: 10px;
}
.seedance-task-header {
    display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px;
    font-size: 13px; color: var(--text-secondary);
}
.seedance-task-status { font-weight: 600; }
.seedance-task-status.status-succeeded { color: var(--success); }
.seedance-task-status.status-failed, .seedance-task-status.status-expired { color: var(--danger); }
.seedance-task-status.status-queued, .seedance-task-status.status-running { color: var(--accent); }
.seedance-video { width: 100%; border-radius: var(--radius-sm); margin-bottom: 10px; }
.seedance-usage { font-size: 12px; color: var(--text-muted); word-break: break-all; }
.seedance-config-modal { max-width: 480px; }
.seedance-config-modal .form-group { margin-bottom: 16px; }
.seedance-config-modal .form-group label {
    display: block; margin-bottom: 6px; font-size: 14px; color: var(--text-secondary);
}
.seedance-config-modal .form-group input,
.seedance-config-modal .form-group select {
    width: 100%; padding: 10px 14px; background: var(--bg-input);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    color: var(--text-primary); font-size: 14px; outline: none;
}


/* ============================================================
   Seedance 2.0 Video Generation
   ============================================================ */
.seedance-bar {
    max-width: 1500px; margin: 8px auto 0; display: flex; gap: 8px;
}
.seedance-toggle-btn, .seedance-settings-btn {
    padding: 6px 14px; background: var(--bg-input); border: 1px solid var(--border);
    color: var(--text-secondary); border-radius: var(--radius-sm); cursor: pointer;
    font-size: 13px; transition: all 0.15s;
}
.seedance-toggle-btn:hover, .seedance-settings-btn:hover {
    background: var(--accent); color: #fff; border-color: var(--accent);
}
.seedance-panel {
    max-width: 1500px; margin: 8px auto 0; background: var(--bg-secondary);
    border: 1px solid var(--border); border-radius: var(--radius);
}
.seedance-panel-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 12px 16px; background: var(--bg-sidebar); border-bottom: 1px solid var(--border);
}
.seedance-panel-header h3 { font-size: 15px; color: var(--text-primary); }
.seedance-panel-body { padding: 16px; }
.seedance-panel-body .form-group { margin-bottom: 12px; }
.seedance-panel-body .form-group label {
    display: block; margin-bottom: 4px; font-size: 13px; color: var(--text-secondary);
}
.seedance-panel-body .form-group input,
.seedance-panel-body .form-group select,
.seedance-panel-body .form-group textarea {
    width: 100%; padding: 8px 12px; background: var(--bg-input);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    color: var(--text-primary); font-size: 14px; outline: none; font-family: inherit;
}
.seedance-panel-body .form-group textarea { resize: vertical; }
.seedance-panel-body .form-group input:focus,
.seedance-panel-body .form-group select:focus,
.seedance-panel-body .form-group textarea:focus { border-color: var(--accent); }
.seedance-params {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px;
}
.seedance-config-row {
    display: flex; align-items: center; gap: 12px;
    margin-bottom: 12px;
    padding: 8px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}
.seedance-config-row .seedance-config-select { flex: 1; max-width: 100%; }

.seedance-toggles {
    display: flex; align-items: center; flex-wrap: wrap; gap: 6px;
    padding: 8px 0; font-size: 13px; color: var(--text-secondary);
}
.seedance-toggles label:not(.toggle-switch) { cursor: pointer; }
.seedance-media-list {
    margin-top: 8px; display: flex; flex-wrap: wrap; gap: 6px;
}
.seedance-generate-btn {
    width: 100%; margin-top: 8px; padding: 10px; font-size: 15px;
}
.seedance-task-area { margin-top: 16px; }
.seedance-status { color: var(--text-secondary); font-size: 14px; padding: 8px 0; }
.seedance-task-card {
    background: var(--bg-input); border: 1px solid var(--border);
    border-radius: var(--radius-sm); padding: 12px;
}
.seedance-task-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 8px; font-size: 13px;
}
.seedance-task-id { color: var(--text-muted); font-size: 12px; }
.seedance-task-status { font-weight: 600; }
.status-queued { color: var(--text-secondary); }
.status-running { color: var(--accent); }
.status-succeeded { color: var(--success); }
.status-failed, .status-expired { color: var(--danger); }
.seedance-video { width: 100%; border-radius: var(--radius-sm); margin-bottom: 8px; }
.seedance-error { color: var(--danger); font-size: 13px; padding: 8px 0; }

/* Submission status banner — shown below the form on click and stays
   visible until the server confirms the task is accepted. */
.seedance-submit-banner {
    display: flex; align-items: center; gap: 12px;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
}
.seedance-submit-banner-success {
    border-left-color: var(--success);
    background: rgba(76,175,132,0.10);
}
.seedance-submit-spinner {
    width: 18px; height: 18px; flex-shrink: 0;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: seedance-spin 0.8s linear infinite;
}
@keyframes seedance-spin { to { transform: rotate(360deg); } }
.seedance-submit-text { flex: 1; min-width: 0; }
.seedance-submit-title { font-size: 14px; font-weight: 600; color: var(--text-primary); }
.seedance-submit-hint { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }

/* Sidebar: red error row below the date for failed records */
.seedance-sidebar-error { color: var(--danger); font-size: 12px; }
.seedance-sidebar-err-label { display: inline-block; min-width: 30px; opacity: 0.8; margin-right: 4px; }
.seedance-sidebar-err-text {
    display: inline-block; max-width: 100%;
    color: var(--danger); font-weight: 600;
    word-break: break-all;
}

/* Detail modal: secondary action row (编辑视频 / 重新生成) */
.seedance-history-actions-secondary {
    display: flex; flex-wrap: wrap; gap: 8px;
    margin-top: 8px;
}
.seedance-history-hint { color: var(--text-muted); font-size: 12px; margin-top: 4px; }

/* Generation form: transient confirmation hint shown above the prompt
   after 编辑视频 / 重新生成 has filled the form. */
.seedance-form-hint {
    display: none;
    padding: 8px 12px;
    margin-bottom: 8px;
    background: rgba(79,110,247,0.12);
    border: 1px solid var(--accent);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 13px;
}
.seedance-form-hint.is-shown {
    display: block;
    animation: seedance-hint-fade 3.5s ease forwards;
}
@keyframes seedance-hint-fade {
    0%   { opacity: 0; transform: translateY(-4px); }
    10%  { opacity: 1; transform: translateY(0); }
    85%  { opacity: 1; }
    100% { opacity: 0; }
}
.seedance-usage { color: var(--text-muted); font-size: 12px; word-break: break-all; }
.seedance-config-modal { max-width: 480px; }
.seedance-config-modal .form-group { margin-bottom: 16px; }
.seedance-config-modal .form-group label {
    display: block; margin-bottom: 6px; font-size: 14px; color: var(--text-secondary);
}
.seedance-config-modal .form-group input,
.seedance-config-modal .form-group select {
    width: 100%; padding: 10px 14px; background: var(--bg-input);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    color: var(--text-primary); font-size: 14px; outline: none;
}

.seedance-media-buttons {
    display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px;
}
.seedance-media-btn {
    padding: 6px 12px; font-size: 13px;
}
.seedance-config-modal .form-group input[type="text"] {
    width: 100%; padding: 10px 14px; background: var(--bg-input);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    color: var(--text-primary); font-size: 14px; outline: none;
}
.seedance-config-modal .form-group input:focus {
    border-color: var(--accent);
}

/* Seedance media items */
.seedance-media-item {
    display: flex; align-items: center; gap: 8px;
    padding: 8px 10px; background: var(--bg-input);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    cursor: pointer; transition: all 0.15s; margin-bottom: 4px;
}
.seedance-media-item:hover {
    border-color: var(--accent); background: var(--bg-hover);
}
.seedance-media-thumb {
    width: 48px; height: 48px; object-fit: cover;
    border-radius: 4px; flex-shrink: 0;
}
.seedance-media-icon {
    font-size: 24px; width: 48px; text-align: center; flex-shrink: 0;
}
.seedance-media-name {
    flex: 1; font-size: 13px; color: var(--text-primary);
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.seedance-media-type {
    font-size: 11px; color: var(--text-muted);
    background: var(--bg-sidebar); padding: 2px 6px; border-radius: 4px;
    text-transform: uppercase;
}
.seedance-media-role {
    font-size: 11px; padding: 2px 4px; border-radius: 4px;
    border: 1px solid var(--border-color); background: var(--bg-sidebar);
    color: var(--text-color); cursor: pointer; max-width: 80px;
}
.seedance-media-role:focus { outline: none; border-color: var(--accent); }

.seedance-media-empty {
    text-align: center; padding: 16px; color: var(--text-muted);
    font-size: 13px; border: 1px dashed var(--border);
    border-radius: var(--radius-sm);
}
.seedance-media-list.drag-over {
    outline: 2px dashed var(--accent);
    outline-offset: -2px;
    background: var(--bg-hover);
    border-radius: var(--radius-sm);
}

/* Prompt wrapper for @ mention */
.seedance-prompt-group { position: relative; }
.seedance-prompt-wrapper { position: relative; }
.seedance-prompt-wrapper textarea { width: 100%; }
.seedance-prompt-thumbnails {
    display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; min-height: 0;
}
.seedance-prompt-thumbnails:empty { display: none; }
.seedance-prompt-thumb-item {
    position: relative; display: flex; flex-direction: column; align-items: center;
    background: var(--bg-secondary); border: 1px solid var(--border-color);
    border-radius: var(--radius-sm); padding: 6px; width: 80px; cursor: pointer;
    transition: border-color 0.2s, transform 0.15s, box-shadow 0.15s;
}
.seedance-prompt-thumb-item:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}
.seedance-prompt-thumb-item:active { transform: translateY(0); }
.seedance-prompt-thumb-img {
    width: 64px; height: 64px; object-fit: cover; border-radius: 4px; margin-bottom: 4px;
}
.seedance-prompt-thumb-icon {
    font-size: 28px; line-height: 64px; height: 64px; margin-bottom: 4px;
}
.seedance-prompt-thumb-name {
    font-size: 11px; color: var(--text-secondary); max-width: 72px;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap; text-align: center;
}
.seedance-mention-dropdown {
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--bg-secondary); border: 1px solid var(--accent);
    border-radius: var(--radius-sm); max-height: 280px; overflow-y: auto;
    z-index: 99999; box-shadow: 0 6px 20px rgba(0,0,0,0.6);
    margin-top: 4px;
}
.seedance-mention-item {
    display: flex; align-items: center; gap: 8px;
    padding: 8px 12px; cursor: pointer; transition: background 0.1s;
    font-size: 13px;
}
.seedance-mention-item:hover { background: var(--bg-hover); }
.seedance-mention-icon { font-size: 18px; width: 28px; text-align: center; }
.seedance-mention-name { flex: 1; color: var(--text-primary); }
.seedance-mention-type {
    font-size: 11px; color: var(--text-muted);
    background: var(--bg-sidebar); padding: 2px 6px; border-radius: 4px;
}
.seedance-mention-thumb {
    width: 36px; height: 36px; object-fit: cover; border-radius: 4px;
    flex-shrink: 0; border: 1px solid var(--border-color);
}
.seedance-mention-item { min-height: 44px; }

/* Seedance config layout */
.seedance-config-layout {
    display: flex; gap: 20px;
}
.seedance-config-left {
    width: 200px; flex-shrink: 0;
    border-right: 1px solid var(--border); padding-right: 16px;
}
.seedance-config-left h4 {
    font-size: 13px; color: var(--text-secondary); margin-bottom: 8px;
}
.seedance-config-right { flex: 1; }
.seedance-config-list {
    max-height: 300px; overflow-y: auto;
}
.seedance-config-item {
    padding: 8px 10px; border-radius: var(--radius-sm); cursor: pointer;
    font-size: 13px; color: var(--text-primary); display: flex;
    align-items: center; justify-content: space-between;
    transition: background 0.1s;
}
.seedance-config-item:hover { background: var(--bg-hover); }
.seedance-config-item.active {
    background: rgba(79,110,247,0.15); color: var(--accent);
}
.seedance-config-badge {
    font-size: 10px; background: var(--accent); color: #fff;
    padding: 1px 6px; border-radius: 8px;
}

/* Seedance config dropdown */
.seedance-config-select {
    background: var(--bg-input); border: 1px solid var(--border);
    color: var(--text-primary); padding: 6px 10px; border-radius: var(--radius-sm);
    font-size: 13px; cursor: pointer; outline: none; max-width: 200px;
}
.seedance-config-select:focus { border-color: var(--accent); }

.seedance-history-btn { width: 100%; }
.seedance-history-panel {
    margin-top: 10px; max-height: 460px; overflow-y: auto;
    border: 1px solid var(--border-color); border-radius: var(--radius-sm);
    background: var(--bg-sidebar); padding: 8px;
}
.seedance-history-header {
    display: flex; justify-content: space-between; align-items: center;
    font-weight: 600; padding: 4px 6px 8px; border-bottom: 1px solid var(--border-color);
    margin-bottom: 8px; flex-wrap: wrap; gap: 8px;
}
.seedance-history-batch-bar {
    display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.seedance-history-select-all-label {
    font-size: 12px; color: var(--text-secondary); cursor: pointer;
    display: flex; align-items: center; gap: 4px; font-weight: normal;
}
.seedance-history-select-all-label input { cursor: pointer; }
.seedance-history-batch-checkbox {
    cursor: pointer; flex-shrink: 0; margin-right: 2px;
}
.seedance-history-refresh { cursor: pointer; font-size: 16px; }
.seedance-history-admin-toggle { padding: 6px 8px; margin-bottom: 6px; font-size: 12px; color: var(--text-muted); }
.seedance-history-admin-toggle label { cursor: pointer; }
.seedance-history-user { font-size: 12px; color: var(--accent); margin-right: 6px; font-weight: 500; }
.seedance-notification-toast {
    position: fixed; right: 20px; bottom: 20px; z-index: 9999;
    background: var(--surface); border: 1px solid var(--border-color);
    border-radius: 8px; padding: 12px 16px; max-width: 320px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15); cursor: pointer;
    animation: seedanceToastIn 0.3s ease;
    transition: opacity 0.3s;
}
.seedance-notification-toast:hover { opacity: 0.85; }
.seedance-notification-title { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.seedance-notification-desc { font-size: 12px; color: var(--text-muted); }
@keyframes seedanceToastIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}
.seedance-history-empty { text-align: center; color: var(--text-muted); padding: 24px; font-size: 13px; }
.seedance-history-item {
    background: var(--bg-main); border: 1px solid var(--border-color);
    border-radius: var(--radius-sm); padding: 10px; margin-bottom: 10px;
}
.seedance-history-item-head {
    display: flex; align-items: center; gap: 8px; margin-bottom: 6px; font-size: 12px;
}
.seedance-history-mode { background: var(--accent); color: #fff; padding: 1px 8px; border-radius: 10px; font-size: 11px; }
.seedance-history-taskid {
    font-size: 11px; color: var(--text-muted);
    background: var(--bg-input); padding: 1px 8px; border-radius: 10px;
    border: 1px solid var(--border); max-width: 200px;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
    font-family: 'Fira Code','Consolas',monospace;
}
.seedance-history-status { font-size: 12px; font-weight: 600; }
.seedance-history-status.status-succeeded { color: var(--success, #2ecc71); }
.seedance-history-status.status-failed { color: var(--danger); }
.seedance-history-date { color: var(--text-muted); margin-left: auto; }
.seedance-history-del { cursor: pointer; }
.seedance-history-prompt { font-size: 13px; color: var(--text-color); margin-bottom: 8px; word-break: break-all; }
.seedance-history-video { width: 100%; border-radius: var(--radius-sm); margin-bottom: 6px; }
.seedance-history-actions { display: flex; align-items: center; gap: 10px; }
.seedance-history-meta { font-size: 11px; color: var(--text-muted); }
.seedance-history-err { font-size: 12px; color: var(--danger); margin-top: 6px; }
.btn-sm { font-size: 12px; padding: 3px 10px; }

/* Seedance panel scroll fix */
.chat-main.seedance-open { overflow-y: auto; }
.chat-main.seedance-open .chat-messages { flex: 0 1 200px; min-height: 120px; }
.seedance-panel { margin-bottom: 24px; }

/* Collapsible history records */
.seedance-history-dur { font-size: 12px; color: var(--text-secondary); }
.seedance-history-expand { margin-left: 4px; font-size: 10px; color: var(--text-muted); }
.seedance-history-item.expanded .seedance-history-expand { transform: rotate(90deg); display: inline-block; }
.seedance-history-detail { padding: 8px 4px 4px; border-top: 1px dashed var(--border-color); margin-top: 6px; }
.seedance-history-row { display: flex; gap: 8px; margin-bottom: 6px; font-size: 13px; align-items: flex-start; }
.seedance-history-row label { min-width: 56px; color: var(--text-muted); font-size: 12px; flex-shrink: 0; }
.seedance-history-row span { flex: 1; word-break: break-all; }
.seedance-history-row video { max-width: 320px; }
.seedance-history-muted { color: var(--text-muted); font-style: italic; }
.seedance-history-item.is-succeeded { border-left: 3px solid var(--success, #2ecc71); }
.seedance-history-local { color: var(--success, #2ecc71); font-size: 14px; margin-left: 6px; }
.seedance-history-row video { max-width: 100%; max-height: 240px; background: #000; }

.seedance-history-status.status-expired { color: #e67e22; }
.seedance-history-item.is-expired { border-left: 3px solid #e67e22; }
.seedance-history-media { display: flex; flex-wrap: wrap; gap: 8px; }
.seedance-history-media-badge {
    display: inline-flex; align-items: center; gap: 2px;
    background: var(--surface); border: 1px solid var(--border-color);
    border-radius: 4px; padding: 2px 6px; font-size: 11px;
    color: var(--text-secondary);
}
.seedance-history-media-badge:hover { border-color: var(--accent); color: var(--accent); }
.seedance-history-media-thumb {
    display: flex; flex-direction: column; align-items: center;
    background: var(--surface); border: 1px solid var(--border-color);
    border-radius: var(--radius-sm); padding: 6px; width: 80px;
    text-decoration: none; transition: border-color 0.2s;
}
.seedance-history-media-thumb:hover { border-color: var(--accent); }
.seedance-history-media-thumb img {
    width: 64px; height: 64px; object-fit: cover; border-radius: 4px; margin-bottom: 4px;
}
.seedance-history-media-icon-large {
    font-size: 28px; line-height: 64px; height: 64px; margin-bottom: 4px;
}
.seedance-history-media-name {
    font-size: 11px; color: var(--text-secondary); max-width: 72px;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap; text-align: center;
}

/* 媒体项预览按钮(取代原 role 下拉框) */
.seedance-media-preview-btn {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 4px;
    width: 28px; height: 28px;
    display: inline-flex; align-items: center; justify-content: center;
    cursor: pointer; color: var(--text-primary);
    font-size: 13px; flex-shrink: 0;
    transition: all 0.15s;
}
.seedance-media-preview-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--bg-hover);
}

/* 音频时长小标签 */
.seedance-media-duration {
    font-size: 11px;
    color: var(--text-muted);
    background: var(--bg-sidebar);
    padding: 1px 6px;
    border-radius: 4px;
    flex-shrink: 0;
}

/* 上传限额提示行 */
.seedance-limits-info {
    display: flex; flex-wrap: wrap; gap: 6px;
    margin: 6px 0;
    font-size: 11px;
    color: var(--text-secondary);
}
.seedance-limit-chip {
    background: var(--bg-input);
    border: 1px solid var(--border);
    padding: 2px 8px;
    border-radius: 10px;
    color: var(--text-secondary);
}
.seedance-limit-chip.is-full {
    color: var(--danger);
    border-color: var(--danger);
    background: rgba(224, 85, 106, 0.08);
}

/* 媒体预览弹窗 */
.seedance-preview-modal {
    position: fixed; inset: 0;
    background: rgba(0, 0, 0, 0.75);
    z-index: 99999;
    display: flex; align-items: center; justify-content: center;
    padding: 20px;
}
.seedance-preview-modal.is-hidden { display: none !important; }
.seedance-preview-content {
    background: var(--bg-main);
    border-radius: 8px;
    max-width: 90vw; max-height: 90vh;
    overflow: auto;
    display: flex; flex-direction: column;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}
.seedance-preview-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    font-size: 14px; font-weight: 500;
    min-width: 320px;
}
.seedance-preview-title {
    flex: 1; word-break: break-all; padding-right: 12px;
}
.seedance-preview-close {
    background: transparent; border: none;
    color: var(--text-muted); cursor: pointer;
    font-size: 24px; line-height: 1;
    padding: 0 4px; flex-shrink: 0;
}
.seedance-preview-close:hover { color: var(--text-primary); }
.seedance-preview-body { padding: 16px; text-align: center; }
.seedance-preview-image {
    max-width: 100%; max-height: 80vh;
    display: block; margin: 0 auto;
    border-radius: 4px;
}
.seedance-preview-video {
    width: 100%; max-width: 800px;
    display: block; margin: 0 auto;
    background: #000; border-radius: 4px;
}
.seedance-preview-audio {
    width: 100%; max-width: 480px;
    display: block; margin: 0 auto;
}

/* ============================================================
   Pagination control (shared by image + video sidebars)
   ============================================================ */
.seedance-pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 4px;
    border-top: 1px solid var(--border);
    background: var(--surface);
    font-size: 12px;
    color: var(--text-primary);
    flex-wrap: wrap;
}
.seedance-pagination-info {
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.seedance-page-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    line-height: 1.4;
    transition: background .12s, border-color .12s;
}
.seedance-page-btn:hover:not(:disabled) {
    background: var(--bg-hover);
    border-color: var(--accent);
    color: var(--accent);
}
.seedance-page-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}
.seedance-page-input {
    width: 48px;
    text-align: center;
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2px 4px;
    font-size: 12px;
    line-height: 1.4;
    -moz-appearance: textfield;
}
.seedance-page-input::-webkit-outer-spin-button,
.seedance-page-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}