/* ═══════════════════════════════════════════════════════════════════════════
   AI 工具箱 - 樣式表
   參照 NextChat 主題系統，純 CSS 實現明暗主題
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── CSS 變數 / 主題 ──────────────────────────────────────────────────────── */

:root {
    /* 配色 - 亮色主題 */
    --white: #ffffff;
    --black: rgb(48, 48, 48);
    --gray: rgb(250, 250, 250);
    --primary: rgb(29, 147, 171);
    --primary-light: rgb(231, 248, 255);
    --second: rgb(231, 248, 255);
    --hover-color: #f3f3f3;
    --bar-color: rgba(0, 0, 0, 0.1);
    --border-color: rgb(222, 222, 222);
    --border: 1px solid rgb(222, 222, 222);
    --shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.05);
    --shadow-lg: 50px 50px 100px 10px rgba(0, 0, 0, 0.1);

    /* 佈局 */
    --sidebar-width: 260px;
    --header-height: 48px;
    --status-height: 32px;
    --radius: 10px;
    --radius-sm: 6px;

    /* 氣泡 */
    --user-bubble-bg: #daf1da;
    --user-bubble-fg: #1a3a1a;
    --asst-bubble-bg: #f0f0f0;
    --asst-bubble-fg: #1a1a2e;

    /* 字體 */
    --font: "Noto Sans", "SF Pro SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;

    /* 動畫 */
    --transition: 0.2s ease;
}

/* Login */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray);
    color: var(--black);
    overflow: auto;
}

.login-shell {
    width: min(420px, calc(100vw - 32px));
}

.login-card {
    background: var(--white);
    border: var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 28px;
}

.login-card h1 {
    margin-bottom: 8px;
    font-size: 24px;
    color: var(--black);
}

.login-card p {
    margin-bottom: 20px;
    color: #777;
    line-height: 1.6;
}

.login-card label {
    display: block;
    margin-bottom: 14px;
    font-size: 13px;
    font-weight: 600;
}

.login-card input {
    width: 100%;
    margin-top: 6px;
    padding: 10px 12px;
    border: var(--border);
    border-radius: var(--radius-sm);
    background: var(--white);
    color: var(--black);
    font-family: var(--font);
}

.login-error {
    margin-bottom: 14px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    background: rgba(229, 115, 115, 0.12);
    color: #e57373;
}

.logout-link {
    display: block;
    padding: 8px 12px;
    color: #777;
    font-size: 13px;
}

/* Background removal */
.bgremove-panel {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 0;
    height: 100%;
}

.bgremove-controls {
    overflow-y: auto;
    padding: 16px;
    background: var(--white);
    border-right: var(--border);
}

.bgremove-results {
    overflow-y: auto;
    padding: 16px;
}

.bgremove-results .placeholder {
    min-height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    border: 1px dashed var(--border-color);
    border-radius: var(--radius);
    background: var(--white);
}

.bg-result-card {
    margin-bottom: 12px;
}

.bg-result-card img {
    background-color: #fff;
    background-image:
        linear-gradient(45deg, #ddd 25%, transparent 25%),
        linear-gradient(-45deg, #ddd 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #ddd 75%),
        linear-gradient(-45deg, transparent 75%, #ddd 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0;
}

.warning-item {
    margin-bottom: 8px;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    background: rgba(255, 152, 0, 0.12);
    color: #b26a00;
    font-size: 13px;
}

.bg-recent-title {
    margin: 14px 0 10px;
    color: var(--black);
    font-weight: 700;
}

.bg-recent-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 12px;
}

.method-balance {
    margin-left: auto;
    color: #777;
    font-size: 12px;
    font-weight: 400;
}

.layer-order-box {
    display: grid;
    gap: 6px;
}

.layer-order-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 8px 10px;
    border: var(--border);
    border-radius: var(--radius-sm);
    background: var(--white);
    color: var(--black);
    cursor: pointer;
    text-align: left;
}

.layer-order-item span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--hover-color);
    color: #777;
    font-size: 12px;
}

.layer-order-item.active {
    border-color: var(--primary);
    background: var(--primary-light);
}

.layer-order-actions {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}

.bg-admin-grid {
    display: grid;
    gap: 12px;
}

.bg-admin-method {
    border: var(--border);
    border-radius: var(--radius-sm);
    padding: 12px;
}

.bg-admin-method h4 {
    margin-bottom: 10px;
    color: var(--black);
}

#bgAdminOptions .admin-editable:disabled {
    opacity: 0.75;
    cursor: not-allowed;
}

#bgAdminOptions .admin-only-action {
    margin-top: 12px;
}

@media (max-width: 900px) {
    .bgremove-panel {
        grid-template-columns: 1fr;
    }

    .bgremove-controls {
        border-right: 0;
        border-bottom: var(--border);
    }
}

[data-theme="dark"] {
    --white: rgb(30, 30, 30);
    --black: rgb(187, 187, 187);
    --gray: rgb(21, 21, 21);
    --primary: rgb(29, 147, 171);
    --primary-light: rgb(27, 38, 42);
    --second: rgb(27, 38, 42);
    --hover-color: #323232;
    --bar-color: rgba(255, 255, 255, 0.1);
    --border-color: rgba(255, 255, 255, 0.192);
    --border: 1px solid rgba(255, 255, 255, 0.192);
    --shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 40px 0 rgba(0, 0, 0, 0.4);

    --user-bubble-bg: #1a3a1a;
    --user-bubble-fg: #b0d0b0;
    --asst-bubble-bg: #2a2a3e;
    --asst-bubble-fg: #c0c0d0;
}

/* ─── 全域重置 ──────────────────────────────────────────────────────────────── */

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

html, body {
    height: 100%;
    font-family: var(--font);
    font-size: 14px;
    background-color: var(--gray);
    color: var(--black);
    overflow: hidden;
}

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

/* ─── 應用容器 ──────────────────────────────────────────────────────────────── */

.app {
    display: flex;
    height: 100vh;
    width: 100vw;
    background: var(--gray);
}

/* ─── 側邊欄 ────────────────────────────────────────────────────────────────── */

.sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background: var(--white);
    border-right: var(--border);
    display: flex;
    flex-direction: column;
    transition: width var(--transition);
}

.sidebar-header {
    padding: 16px;
    border-bottom: var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-header .logo {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
}

.sidebar-header .logo-icon {
    font-size: 22px;
}

.sidebar-nav {
    flex: 1;
    padding: 8px;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: var(--radius);
    cursor: pointer;
    color: var(--black);
    transition: background var(--transition);
    margin-bottom: 2px;
    font-size: 14px;
    user-select: none;
}

.nav-item:hover {
    background: var(--hover-color);
}

.nav-item.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}

.nav-item .nav-icon {
    font-size: 18px;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: 12px 16px;
    border-top: var(--border);
}

.theme-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--black);
    padding: 8px 14px;
    border-radius: var(--radius);
    transition: background var(--transition);
    user-select: none;
    font-size: 13px;
}

.theme-toggle:hover {
    background: var(--hover-color);
}

/* ─── 主內容區 ──────────────────────────────────────────────────────────────── */

.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: var(--gray);
}

/* ─── 頂部標題列 ────────────────────────────────────────────────────────────── */

.main-header {
    height: var(--header-height);
    padding: 0 20px;
    background: var(--white);
    border-bottom: var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.main-header .title {
    font-size: 15px;
    font-weight: 600;
    color: var(--black);
}

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

/* ─── 內容面板 ──────────────────────────────────────────────────────────────── */

.content {
    flex: 1;
    overflow: hidden;
    position: relative;
}

.panel {
    display: none;
    height: 100%;
    flex-direction: column;
}

.panel.active {
    display: flex;
}

/* ─── 聊天面板 ──────────────────────────────────────────────────────────────── */

.chat-panel {
    display: flex;
    height: 100%;
}

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

.chat-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    scroll-behavior: smooth;
}

/* 聊天訊息氣泡 */
.chat-message {
    display: flex;
    margin-bottom: 16px;
    animation: fadeIn 0.3s ease;
}

.chat-message.user {
    flex-direction: row-reverse;
}

.chat-message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
    margin: 0 10px;
}

.chat-message.user .chat-message-avatar {
    background: #4caf50;
    color: white;
}

.chat-message.assistant .chat-message-avatar {
    background: var(--primary);
    color: white;
}

.chat-message-container {
    max-width: 80%;
    display: flex;
    flex-direction: column;
}

.chat-message-header {
    font-size: 11px;
    color: #888;
    margin-bottom: 4px;
}

.chat-message.user .chat-message-header {
    text-align: right;
}

.chat-message-item {
    padding: 10px 14px;
    border-radius: var(--radius);
    line-height: 1.6;
    word-break: break-word;
    white-space: pre-wrap;
    font-size: 14px;
}

.chat-message.user .chat-message-item {
    background: var(--user-bubble-bg);
    color: var(--user-bubble-fg);
    border-top-right-radius: 2px;
}

.chat-message.assistant .chat-message-item {
    background: var(--asst-bubble-bg);
    color: var(--asst-bubble-fg);
    border-top-left-radius: 2px;
}

.chat-message-item img {
    max-width: 100%;
    border-radius: 8px;
    margin-top: 8px;
}

/* 串流指示器 */
.typing-indicator {
    display: inline-flex;
    gap: 4px;
    padding: 4px 0;
}

.typing-indicator span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #999;
    animation: typingBounce 1.4s infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

/* 輸入區 */
.chat-input-panel {
    padding: 12px 20px 16px;
    background: var(--white);
    border-top: var(--border);
}

.chat-input-actions {
    display: flex;
    gap: 6px;
    margin-bottom: 8px;
    flex-wrap: wrap;
    align-items: center;
}

.input-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    border-radius: 20px;
    background: var(--white);
    color: var(--black);
    border: var(--border);
    cursor: pointer;
    font-size: 12px;
    box-shadow: var(--shadow);
    transition: all var(--transition);
    user-select: none;
}

.input-action-btn:hover {
    background: var(--hover-color);
}

.input-action-btn.active {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary);
}

.chat-input-wrap {
    position: relative;
    display: flex;
    align-items: flex-end;
    border: var(--border);
    border-radius: var(--radius);
    background: var(--white);
    transition: border-color var(--transition);
}

.chat-input-wrap:focus-within {
    border-color: var(--primary);
}

.chat-input {
    flex: 1;
    border: none;
    outline: none;
    resize: none;
    padding: 10px 14px;
    font-family: var(--font);
    font-size: 14px;
    line-height: 1.5;
    max-height: 120px;
    min-height: 44px;
    background: transparent;
    color: var(--black);
}

.chat-input::placeholder {
    color: #aaa;
}

.send-btn {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--primary);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 4px;
    flex-shrink: 0;
    font-size: 16px;
    transition: opacity var(--transition);
}

.send-btn:hover { opacity: 0.85; }
.send-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* 附圖預覽 */
.attach-images {
    display: flex;
    gap: 8px;
    padding: 0 0 8px;
}

.attach-image {
    position: relative;
    width: 64px;
    height: 64px;
    border-radius: 5px;
    border: 1px solid rgba(136, 136, 136, 0.2);
    background-size: cover;
    background-position: center;
    background-color: var(--white);
}

.attach-image .delete-btn {
    position: absolute;
    top: 2px;
    right: 2px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(0,0,0,0.5);
    color: white;
    border: none;
    cursor: pointer;
    font-size: 10px;
    display: none;
    align-items: center;
    justify-content: center;
}

.attach-image:hover .delete-btn { display: flex; }

/* 聊天設定側欄 */
.chat-settings {
    width: 240px;
    min-width: 240px;
    background: var(--white);
    border-left: var(--border);
    padding: 16px;
    overflow-y: auto;
}

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

.settings-group label {
    display: block;
    font-size: 12px;
    color: #888;
    margin-bottom: 4px;
}

.settings-group select,
.settings-group input[type="number"],
.settings-group textarea {
    width: 100%;
    padding: 6px 10px;
    border: var(--border);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 13px;
    background: var(--white);
    color: var(--black);
    outline: none;
}

.settings-group select:focus,
.settings-group input:focus,
.settings-group textarea:focus {
    border-color: var(--primary);
}

.settings-group textarea {
    resize: vertical;
    min-height: 60px;
}

/* ─── 圖片生成面板 ──────────────────────────────────────────────────────────── */

.generate-panel, .edit-panel {
    display: flex;
    height: 100%;
}

.gen-controls, .edit-controls {
    width: 320px;
    min-width: 320px;
    background: var(--white);
    border-right: var(--border);
    padding: 16px;
    overflow-y: auto;
}

.gen-results, .edit-results {
    flex: 1;
    background: #1e1e2e;
    overflow-y: auto;
    padding: 16px;
}

.gen-results .placeholder,
.edit-results .placeholder {
    color: #666;
    text-align: center;
    padding-top: 80px;
    font-size: 16px;
}

/* 表單元素 */
.form-group {
    margin-bottom: 14px;
}

.form-group label {
    display: block;
    font-size: 12px;
    color: #888;
    margin-bottom: 4px;
}

.form-group label .hint {
    font-size: 11px;
    color: #aaa;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="password"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 6px 10px;
    border: var(--border);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 13px;
    background: var(--white);
    color: var(--black);
    outline: none;
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
}

/* 尺寸行 */
.size-row {
    display: flex;
    gap: 8px;
    align-items: center;
}

.size-row select { flex: 1; }

.size-row .custom-input {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-top: 6px;
    width: 100%;
}

.size-row .custom-input input {
    width: 60px;
    padding: 4px 8px;
    text-align: center;
}

/* 並發設定行 */
.inline-row {
    display: flex;
    gap: 10px;
    align-items: center;
}

.inline-row .form-group { flex: 1; margin-bottom: 0; }

/* 按鈕 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    font-family: var(--font);
    font-size: 13px;
    font-weight: 500;
    transition: all var(--transition);
    user-select: none;
}

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

.btn-primary:hover { opacity: 0.85; }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-danger {
    background: #e57373;
    color: white;
}

.btn-danger:hover { opacity: 0.85; }
.btn-danger:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-outline {
    background: var(--white);
    color: var(--black);
    border: var(--border);
}

.btn-outline:hover { background: var(--hover-color); }

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: 4px 10px;
    font-size: 12px;
}

/* 進度條 */
.progress-bar {
    height: 4px;
    background: rgba(29, 147, 171, 0.2);
    border-radius: 2px;
    overflow: hidden;
    margin: 8px 0;
}

.progress-bar .fill {
    height: 100%;
    background: var(--primary);
    border-radius: 2px;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 12px;
    color: var(--primary);
    margin-bottom: 4px;
}

/* 圖片網格 */
.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}

.image-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.2s ease;
}

.image-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
}

.image-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
    cursor: pointer;
}

.image-card .image-info {
    padding: 8px 10px;
    font-size: 11px;
    color: #aaa;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.image-card .image-info a {
    color: var(--primary);
    font-size: 12px;
}

/* ─── 編輯面板特殊樣式 ──────────────────────────────────────────────────────── */

.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    color: #888;
    font-size: 13px;
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 4px;
}

.upload-zone:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.upload-zone.has-file {
    border-color: #4caf50;
    color: #4caf50;
    border-style: solid;
}

.upload-zone img {
    max-width: 100%;
    max-height: 120px;
    border-radius: 6px;
    margin-top: 8px;
}

/* ─── 全域選項面板 ──────────────────────────────────────────────────────────── */

.options-panel {
    padding: 20px;
    max-width: 600px;
}

.options-panel .section {
    background: var(--white);
    border: var(--border);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 16px;
}

.options-panel .section h3 {
    font-size: 14px;
    margin-bottom: 12px;
    color: var(--black);
}

/* ─── 狀態列 ────────────────────────────────────────────────────────────────── */

.status-bar {
    height: var(--status-height);
    padding: 0 16px;
    background: var(--white);
    border-top: var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: #888;
    flex-shrink: 0;
}

.status-bar .status-left {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.status-bar .status-right {
    flex-shrink: 0;
    margin-left: 12px;
}

/* ─── 圖片預覽彈窗 ──────────────────────────────────────────────────────────── */

.modal-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: zoom-out;
}

.modal-overlay img {
    max-width: 90%;
    max-height: 90%;
    border-radius: 8px;
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
}

/* ─── Toast 通知 ────────────────────────────────────────────────────────────── */

.toast-container {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 13px;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    max-width: 360px;
    word-break: break-word;
}

.toast.success { background: #4caf50; }
.toast.error   { background: #e57373; }
.toast.info    { background: var(--primary); }

/* ─── 迷你按鈕 ──────────────────────────────────────────────────────────────── */

.icon-btn {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: var(--black);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: background var(--transition);
}

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

/* ─── Checkbox ──────────────────────────────────────────────────────────────── */

.checkbox-wrap {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 13px;
    user-select: none;
}

.checkbox-wrap input[type="checkbox"] {
    accent-color: var(--primary);
}

/* ─── 滾動條 ────────────────────────────────────────────────────────────────── */

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.15);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* ─── 動畫 ──────────────────────────────────────────────────────────────────── */

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

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

@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-4px); }
}

/* ─── 響應式 ────────────────────────────────────────────────────────────────── */

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -260px;
        z-index: 100;
        height: 100vh;
        transition: left 0.3s ease;
    }

    .sidebar.open { left: 0; }

    .chat-settings { display: none; }

    .gen-controls, .edit-controls {
        width: 100%;
        min-width: unset;
        border-right: none;
        border-bottom: var(--border);
    }

    .generate-panel, .edit-panel {
        flex-direction: column;
    }

    .chat-message-container { max-width: 95%; }
}