/* css/style.css */
:root {
    --bg-primary: #0f0f14;
    --bg-secondary: #1a1a24;
    --bg-tertiary: #222230;
    --bg-card: #1e1e2a;
    --bg-input: #252535;
    --bg-hover: #2a2a3a;
    --text-primary: #e8e8f0;
    --text-secondary: #a0a0b8;
    --text-muted: #6b6b80;
    --accent: #6c8cff;
    --accent-hover: #8aa4ff;
    --accent-soft: rgba(108, 140, 255, 0.12);
    --border-color: #2a2a3d;
    --border-light: #333348;
    --user-msg-bg: #1e3a5f;
    --user-msg-border: #2a5080;
    --ai-msg-bg: #1a1a28;
    --ai-msg-border: #2a2a3d;
    --danger: #e0556a;
    --danger-hover: #f07080;
    --success: #4caf84;
    --warning: #e0a850;
    --code-bg: #151520;
    --code-border: #2a2a3d;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: 'Inter', 'Noto Sans SC', 'Noto Sans TC', 'Noto Sans JP', 'Noto Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'SF Mono', monospace;
    --safe-bottom: env(safe-area-inset-bottom, 16px);
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
    height: 100%;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100%;
    height: 100%;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    user-select: none;
    -webkit-user-select: none;
}

.page {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
    z-index: 1;
}

.page.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    z-index: 0;
}

.lang-container {
    text-align: center;
    padding: 2rem;
    max-width: 440px;
    width: 90%;
    animation: fadeInUp 0.5s ease-out;
}

.lang-icon { color: var(--accent); margin-bottom: 1.2rem; display: inline-block; animation: float 3s ease-in-out infinite; }

@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }

.lang-title { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.4rem; color: var(--text-primary); letter-spacing: -0.01em; }
.lang-subtitle { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 1.8rem; }
.lang-list { display: flex; flex-direction: column; gap: 10px; }

.lang-btn {
    display: block; width: 100%; padding: 14px 20px; font-size: 1rem; font-weight: 500; font-family: var(--font-sans);
    color: var(--text-primary); background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-md);
    cursor: pointer; transition: all var(--transition); text-align: center; letter-spacing: 0.01em;
}
.lang-btn:hover { background: var(--bg-hover); border-color: var(--accent); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.lang-btn:active { transform: scale(0.98); background: var(--accent-soft); border-color: var(--accent); }

.config-container { width: 90%; max-width: 480px; padding: 1.5rem; animation: fadeInUp 0.5s ease-out; }
.config-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.6rem; }
.config-back { background: none; border: none; color: var(--text-secondary); cursor: pointer; padding: 6px; border-radius: 50%; transition: all var(--transition); display: flex; align-items: center; justify-content: center; }
.config-back:hover { color: var(--text-primary); background: var(--bg-hover); }
.config-title { font-size: 1.3rem; font-weight: 700; color: var(--text-primary); text-align: center; }
.config-desc { text-align: center; color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 1.5rem; }
.config-form { display: flex; flex-direction: column; gap: 1.1rem; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group label { font-size: 0.85rem; font-weight: 600; color: var(--text-primary); letter-spacing: 0.01em; }
.form-group input, .settings-input { padding: 12px 14px; font-size: 0.95rem; font-family: var(--font-mono); background: var(--bg-input); border: 1px solid var(--border-color); border-radius: var(--radius-sm); color: var(--text-primary); outline: none; transition: all var(--transition); letter-spacing: 0.01em; width: 100%; }
.form-group input:focus, .settings-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.form-group input::placeholder { color: var(--text-muted); font-family: var(--font-sans); font-size: 0.85rem; }
.form-hint { font-size: 0.75rem; color: var(--text-muted); padding-left: 2px; }
.input-wrapper { position: relative; display: flex; align-items: center; }
.input-wrapper input { width: 100%; padding-right: 44px; }
.toggle-password { position: absolute; right: 6px; background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 8px; display: flex; align-items: center; justify-content: center; border-radius: 50%; transition: color var(--transition); }
.toggle-password:hover { color: var(--text-primary); }
.config-submit { margin-top: 0.5rem; padding: 14px 20px; font-size: 1rem; font-weight: 600; font-family: var(--font-sans); color: #fff; background: var(--accent); border: none; border-radius: var(--radius-md); cursor: pointer; transition: all var(--transition); letter-spacing: 0.02em; }
.config-submit:hover { background: var(--accent-hover); box-shadow: var(--shadow-md); transform: translateY(-1px); }
.config-submit:active { transform: scale(0.97); }
.config-note { text-align: center; font-size: 0.78rem; color: var(--text-muted); margin-top: 1rem; line-height: 1.5; }

.chat-container { width: 100%; height: 100%; display: flex; flex-direction: column; max-width: 860px; margin: 0 auto; }

.chat-header {
    display: flex; align-items: center; justify-content: space-between; padding: 10px 12px;
    background: var(--bg-secondary); border-bottom: 1px solid var(--border-color); flex-shrink: 0; z-index: 10; min-height: 50px; position: relative;
}
.header-left, .header-right { display: flex; align-items: center; gap: 4px; flex: 0 0 auto; min-width: 40px; }
.header-right { justify-content: flex-end; }
.header-center { flex: 1; display: flex; justify-content: center; position: relative; }

.conv-switcher-btn {
    display: flex; align-items: center; gap: 6px; background: none; border: none; color: var(--text-primary);
    cursor: pointer; padding: 6px 12px; border-radius: var(--radius-md); transition: all var(--transition);
    font-family: var(--font-sans); font-size: 0.9rem; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 220px;
}
.conv-switcher-btn:hover { background: var(--bg-hover); }
.conv-chevron { flex-shrink: 0; color: var(--text-muted); transition: transform var(--transition); }
.conv-switcher-btn.active .conv-chevron { transform: rotate(180deg); }

.conv-dropdown {
    position: absolute; top: calc(100% + 6px); left: 50%; transform: translateX(-50%);
    background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg); min-width: 240px; max-width: 90vw; z-index: 20; overflow: hidden; animation: dropdownFadeIn 0.2s ease-out;
}
.conv-dropdown.hidden { display: none; }
@keyframes dropdownFadeIn { from { opacity: 0; transform: translateX(-50%) translateY(-5px); } to { opacity: 1; transform: translateX(-50%) translateY(0); } }
.conv-dropdown-item { display: flex; align-items: center; justify-content: space-between; padding: 12px 14px; cursor: pointer; transition: background var(--transition); border-bottom: 1px solid var(--border-color); }
.conv-dropdown-item:last-child { border-bottom: none; }
.conv-dropdown-item:hover { background: var(--bg-hover); }
.conv-dropdown-item.active { background: var(--accent-soft); border-left: 3px solid var(--accent); padding-left: 11px; }
.conv-item-title { flex: 1; font-size: 0.85rem; font-weight: 500; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-right: 8px; }
.conv-item-delete { background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 4px 8px; font-size: 1rem; line-height: 1; border-radius: 4px; transition: all var(--transition); flex-shrink: 0; }
.conv-item-delete:hover { color: var(--danger); background: rgba(224, 85, 106, 0.15); }

.header-btn {
    background: none; border: none; color: var(--text-secondary); cursor: pointer; padding: 8px; border-radius: 50%;
    transition: all var(--transition); display: flex; align-items: center; justify-content: center;
}
.header-btn:hover { color: var(--text-primary); background: var(--bg-hover); }
.header-btn svg { fill: none; } /* 确保图标无填充 */

.chat-messages { flex: 1; overflow-y: auto; padding: 16px 12px; display: flex; flex-direction: column; gap: 12px; scroll-behavior: smooth; -webkit-overflow-scrolling: touch; }
.chat-messages::-webkit-scrollbar { width: 4px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 10px; }

.welcome-message { text-align: center; padding: 3rem 1.5rem; margin: auto; animation: fadeInUp 0.6s ease-out; }
.welcome-icon { color: var(--accent); margin-bottom: 1rem; opacity: 0.7; }
.welcome-message h3 { font-size: 1.3rem; font-weight: 600; color: var(--text-primary); margin-bottom: 0.4rem; }
.welcome-message p { font-size: 0.9rem; color: var(--text-secondary); }

.message { display: flex; flex-direction: column; max-width: 88%; animation: messageSlideIn 0.3s ease-out; }
@keyframes messageSlideIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.message.user { align-self: flex-end; }
.message.assistant { align-self: flex-start; }
.message-role { font-size: 0.7rem; font-weight: 600; color: var(--text-muted); margin-bottom: 2px; padding: 0 8px; text-transform: uppercase; letter-spacing: 0.05em; }
.message.user .message-role { text-align: right; color: #7eb8ff; }
.message.assistant .message-role { text-align: left; color: #8cc8a0; }

.message-content {
    padding: 12px 16px; border-radius: var(--radius-lg); font-size: 0.93rem; line-height: 1.65;
    word-break: break-word; overflow-wrap: break-word; position: relative;
}
.message.user .message-content { background: var(--user-msg-bg); border: 1px solid var(--user-msg-border); border-bottom-right-radius: 6px; color: #d0e0ff; }
.message.assistant .message-content { background: var(--ai-msg-bg); border: 1px solid var(--ai-msg-border); border-bottom-left-radius: 6px; color: var(--text-primary); }

.message-content p { margin-bottom: 0.6em; } .message-content p:last-child { margin-bottom: 0; }
.message-content code { font-family: var(--font-mono); font-size: 0.82em; background: var(--code-bg); padding: 2px 6px; border-radius: 4px; border: 1px solid var(--code-border); }
.message-content pre { background: var(--code-bg); border: 1px solid var(--code-border); border-radius: var(--radius-sm); padding: 0; margin: 10px 0; overflow-x: auto; position: relative; -webkit-overflow-scrolling: touch; }
.message-content pre code { display: block; padding: 14px 16px; background: none; border: none; font-size: 0.8em; line-height: 1.55; white-space: pre; border-radius: 0; }
.code-block-wrapper { position: relative; margin: 10px 0; } .code-block-wrapper pre { margin: 0; }
.copy-code-btn { position: absolute; top: 8px; right: 8px; background: var(--bg-tertiary); border: 1px solid var(--border-light); color: var(--text-secondary); cursor: pointer; padding: 5px 10px; font-size: 0.7rem; border-radius: 6px; font-family: var(--font-sans); transition: all var(--transition); opacity: 0; z-index: 2; }
.code-block-wrapper:hover .copy-code-btn, .code-block-wrapper:active .copy-code-btn { opacity: 1; }
.copy-code-btn:hover { background: var(--bg-hover); color: var(--text-primary); border-color: var(--accent); }
.copy-code-btn.copied { background: var(--success); color: #fff; border-color: var(--success); }
.message-content ul, .message-content ol { padding-left: 1.4em; margin: 6px 0; } .message-content li { margin-bottom: 3px; }
.message-content blockquote { border-left: 3px solid var(--accent); padding-left: 12px; margin: 8px 0; color: var(--text-secondary); font-style: italic; }
.message-content a { color: var(--accent); text-decoration: none; } .message-content a:hover { text-decoration: underline; }
.message-content table { border-collapse: collapse; width: 100%; margin: 8px 0; font-size: 0.85em; }
.message-content th, .message-content td { border: 1px solid var(--border-color); padding: 6px 10px; text-align: left; }
.message-content th { background: var(--bg-tertiary); font-weight: 600; }

.message-actions { display: flex; gap: 6px; margin-top: 4px; padding: 0 8px; opacity: 0; transition: opacity var(--transition); }
.message:hover .message-actions, .message:active .message-actions { opacity: 1; }
.message.user .message-actions { justify-content: flex-end; }
.msg-action-btn { background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 4px 8px; font-size: 0.72rem; border-radius: 6px; transition: all var(--transition); font-family: var(--font-sans); }
.msg-action-btn:hover { color: var(--text-primary); background: var(--bg-hover); }

.streaming-cursor::after { content: '▋'; animation: blink 1s step-end infinite; color: var(--accent); font-weight: 400; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.chat-input-area {
    padding: 10px 12px; padding-bottom: calc(10px + var(--safe-bottom));
    background: var(--bg-secondary); border-top: 1px solid var(--border-color); flex-shrink: 0;
}
.input-row {
    display: flex; align-items: flex-end; gap: 8px; background: var(--bg-input);
    border: 1px solid var(--border-color); border-radius: var(--radius-xl); padding: 6px 8px; transition: border-color var(--transition);
}
.input-row:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.upload-btn {
    flex-shrink: 0; width: 38px; height: 38px; border-radius: 50%; border: none; cursor: pointer;
    display: flex; align-items: center; justify-content: center; transition: all var(--transition);
    background: transparent; color: var(--text-secondary);
}
.upload-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.upload-btn svg { stroke: currentColor; fill: none; }

.chat-input {
    flex: 1; border: none; background: transparent; color: var(--text-primary); font-family: var(--font-sans);
    font-size: 0.93rem; line-height: 1.5; resize: none; outline: none; max-height: 140px; min-height: 24px;
    padding: 6px 4px; -webkit-user-select: text; user-select: text;
}
.chat-input::placeholder { color: var(--text-muted); }

.send-btn, .stop-btn {
    flex-shrink: 0; width: 38px; height: 38px; border-radius: 50%; border: none; cursor: pointer;
    display: flex; align-items: center; justify-content: center; transition: all var(--transition);
}
.send-btn { background: var(--accent); color: #fff; }
.send-btn:hover { background: var(--accent-hover); transform: scale(1.05); }
.send-btn:active { transform: scale(0.92); }
.send-btn:disabled { background: var(--bg-tertiary); color: var(--text-muted); cursor: not-allowed; transform: none; }
.stop-btn { background: var(--danger); color: #fff; }
.stop-btn:hover { background: var(--danger-hover); }
.stop-btn.hidden { display: none; }
.send-btn.hidden { display: none; }

.input-hint { text-align: center; font-size: 0.7rem; color: var(--text-muted); margin-top: 6px; opacity: 0.7; }

.modal-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.55);
    z-index: 90; display: flex; align-items: center; justify-content: center; transition: opacity var(--transition); opacity: 1;
}
.modal-overlay.hidden { opacity: 0; pointer-events: none; }
.modal-dialog {
    position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%);
    background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg); width: 90%; max-width: 400px; z-index: 95; display: flex; flex-direction: column;
    transition: opacity var(--transition), transform var(--transition); opacity: 1;
}
.modal-dialog.hidden { opacity: 0; pointer-events: none; transform: translate(-50%, -50%) scale(0.95); }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 18px; border-bottom: 1px solid var(--border-color); }
.modal-header h3 { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); }
.modal-close { background: none; border: none; color: var(--text-secondary); cursor: pointer; padding: 4px; border-radius: 50%; display: flex; transition: all var(--transition); }
.modal-close:hover { color: var(--text-primary); background: var(--bg-hover); }
.modal-body { padding: 16px 18px; display: flex; flex-direction: column; gap: 12px; }
.conv-type-card {
    display: flex; gap: 14px; padding: 14px; background: var(--bg-input); border: 2px solid var(--border-color);
    border-radius: var(--radius-md); cursor: pointer; transition: all var(--transition); align-items: center;
}
.conv-type-card:hover { border-color: var(--accent); background: var(--bg-hover); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.conv-type-info h4 { font-size: 0.95rem; font-weight: 700; color: var(--text-primary); margin-bottom: 4px; }
.conv-type-info p { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.4; }

.settings-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.55); z-index: 100; transition: opacity var(--transition-slow); opacity: 1; }
.settings-overlay.hidden { opacity: 0; pointer-events: none; }
.settings-panel { position: fixed; top: 0; right: 0; width: 88%; max-width: 400px; height: 100%; background: var(--bg-secondary); z-index: 101; box-shadow: var(--shadow-lg); transform: translateX(0); transition: transform var(--transition-slow); display: flex; flex-direction: column; border-left: 1px solid var(--border-color); }
.settings-panel.hidden { transform: translateX(100%); }
.settings-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 18px; border-bottom: 1px solid var(--border-color); flex-shrink: 0; }
.settings-header h3 { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); }
.settings-close { background: none; border: none; color: var(--text-secondary); cursor: pointer; padding: 6px; border-radius: 50%; transition: all var(--transition); display: flex; }
.settings-close:hover { color: var(--text-primary); background: var(--bg-hover); }
.settings-body { flex: 1; overflow-y: auto; padding: 16px 18px; display: flex; flex-direction: column; gap: 20px; -webkit-overflow-scrolling: touch; }
.settings-section h4 { font-size: 0.8rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 10px; }
.settings-select { width: 100%; padding: 10px 14px; font-size: 0.9rem; font-family: var(--font-sans); background: var(--bg-input); border: 1px solid var(--border-color); border-radius: var(--radius-sm); color: var(--text-primary); outline: none; cursor: pointer; transition: all var(--transition); appearance: none; -webkit-appearance: none; background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%23a0a0b8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 36px; }
.settings-select:focus { border-color: var(--accent); }
.settings-api-info { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-sm); padding: 12px 14px; margin-bottom: 8px; }
.settings-api-info p { font-size: 0.82rem; color: var(--text-secondary); margin-bottom: 4px; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.settings-api-info p:last-child { margin-bottom: 0; } .settings-api-info span { color: var(--text-muted); flex-shrink: 0; }
.settings-api-info code { font-family: var(--font-mono); font-size: 0.75em; color: var(--text-primary); background: var(--bg-input); padding: 2px 8px; border-radius: 4px; word-break: break-all; }
.settings-btn-secondary { width: 100%; padding: 10px 14px; font-size: 0.88rem; font-family: var(--font-sans); font-weight: 500; color: var(--accent); background: var(--accent-soft); border: 1px solid transparent; border-radius: var(--radius-sm); cursor: pointer; transition: all var(--transition); }
.settings-btn-secondary:hover { background: rgba(108, 140, 255, 0.2); border-color: var(--accent); }
.settings-btn-danger { width: 100%; padding: 10px 14px; font-size: 0.88rem; font-family: var(--font-sans); font-weight: 500; color: #fff; background: var(--danger); border: none; border-radius: var(--radius-sm); cursor: pointer; transition: all var(--transition); margin-bottom: 8px; }
.settings-btn-danger:hover { background: var(--danger-hover); }
.settings-btn-danger-outline { width: 100%; padding: 10px 14px; font-size: 0.88rem; font-family: var(--font-sans); font-weight: 500; color: var(--danger); background: transparent; border: 1px solid var(--danger); border-radius: var(--radius-sm); cursor: pointer; transition: all var(--transition); }
.settings-btn-danger-outline:hover { background: rgba(224, 85, 106, 0.1); }

.toast { position: fixed; bottom: 80px; left: 50%; transform: translateX(-50%); background: var(--bg-tertiary); color: var(--text-primary); padding: 10px 20px; border-radius: 24px; font-size: 0.85rem; font-weight: 500; z-index: 200; box-shadow: var(--shadow-md); border: 1px solid var(--border-light); transition: opacity var(--transition), transform var(--transition); opacity: 1; pointer-events: none; }
.toast.hidden { opacity: 0; transform: translateX(-50%) translateY(20px); } .toast.success { border-color: var(--success); color: var(--success); } .toast.error { border-color: var(--danger); color: var(--danger); }

@media (max-width: 600px) {
    .chat-messages { padding: 10px 8px; gap: 8px; } .message { max-width: 94%; } .message-content { padding: 10px 12px; font-size: 0.9rem; border-radius: var(--radius-md); }
    .message.user .message-content { border-bottom-right-radius: 4px; } .message.assistant .message-content { border-bottom-left-radius: 4px; }
    .chat-header { padding: 8px 10px; min-height: 44px; } .chat-input-area { padding: 8px 8px; padding-bottom: calc(8px + var(--safe-bottom)); }
    .settings-panel { width: 92%; max-width: none; } .lang-title { font-size: 1.3rem; } .config-container { padding: 1rem; }
}
@media (min-width: 768px) { .chat-messages { padding: 20px 24px; } .message { max-width: 78%; } .chat-input-area { padding: 12px 20px; padding-bottom: calc(12px + var(--safe-bottom)); } }
@media (min-width: 1024px) { .chat-container { max-width: 860px; border-left: 1px solid var(--border-color); border-right: 1px solid var(--border-color); } .message { max-width: 70%; } }

.typing-indicator { display: flex; gap: 4px; padding: 8px 12px; }
.typing-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--text-muted); animation: typingBounce 1.4s ease-in-out infinite; }
.typing-dot:nth-child(2) { animation-delay: 0.2s; } .typing-dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes typingBounce { 0%, 60%, 100% { transform: translateY(0); opacity: 0.4; } 30% { transform: translateY(-8px); opacity: 1; } }

::-webkit-scrollbar { width: 5px; height: 5px; } ::-webkit-scrollbar-track { background: transparent; } ::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 10px; } ::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }