/* === CHAT AI (Google AI Studio Style) === */
.app-chat-ai {
    display: flex;
    height: 100%;
    background: var(--bg-surface);
}

.chat-sidebar {
    width: 260px;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    background: rgba(0, 0, 0, 0.1);
    flex-shrink: 0;
}

.chat-sidebar-header {
    padding: 16px;
}

.chat-new-btn {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    background: var(--bg-glass);
    color: var(--text-primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--transition);
}

.chat-new-btn:hover {
    background: var(--bg-hover);
}

.chat-history {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.chat-history-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-secondary);
    transition: background var(--transition);
    margin-bottom: 2px;
    position: relative;
    overflow: hidden;
}

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

.chat-history-item.active {
    background: var(--accent-soft);
    color: var(--accent);
}

.chat-item-title {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-history-item .material-icons-round {
    font-size: 18px;
    flex-shrink: 0;
}

.chat-item-delete {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 4px;
    border-radius: 4px;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition), background var(--transition), color var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-history-item:hover .chat-item-delete {
    opacity: 1;
}

.chat-item-delete:hover {
    background: rgba(255, 77, 77, 0.15);
    color: #ff6b6b;
}

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

.chat-header {
    height: 56px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    gap: 12px;
}

.chat-model-selector-container {
    position: relative;
    display: flex;
    align-items: center;
    min-width: 0;
    z-index: 35;
    pointer-events: auto;
}

.chat-model-trigger {
    min-width: 180px;
    height: 44px;
    padding: 0 12px 0 0;
    border: none;
    background: transparent;
    color: #f4f6fb;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.chat-model-trigger .material-icons-round {
    font-size: 22px;
    color: rgba(244, 246, 251, 0.9);
}

.chat-model-trigger-label {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-model-menu {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    width: min(560px, calc(100vw - 40px));
    padding: 18px;
    border-radius: 26px;
    background: rgba(31, 31, 35, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.06);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.42);
    backdrop-filter: blur(20px);
    z-index: 30;
    pointer-events: auto;
}

.chat-model-menu-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 14px;
}

.chat-model-menu-title {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #e7eaf0;
    font-size: 20px;
    font-weight: 500;
}

.chat-model-menu-title .material-icons-round {
    font-size: 18px;
    color: rgba(232, 236, 244, 0.76);
}

.chat-model-compare-toggle {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: rgba(232, 236, 244, 0.75);
    font-size: 14px;
    font-weight: 500;
    user-select: none;
}

.chat-switch {
    position: relative;
    width: 56px;
    height: 30px;
    display: inline-flex;
    align-items: center;
}

.chat-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.chat-switch-track {
    position: absolute;
    inset: 0;
    border-radius: 999px;
    background: #6f7078;
    transition: background 0.16s ease;
}

.chat-switch-track::after {
    content: "";
    position: absolute;
    top: 3px;
    left: 3px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.24);
    transition: transform 0.16s ease;
}

.chat-switch input:checked + .chat-switch-track {
    background: #5f5eea;
}

.chat-switch input:checked + .chat-switch-track::after {
    transform: translateX(26px);
}

.chat-model-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.chat-model-item {
    width: 100%;
    padding: 12px 12px 12px 0;
    background: transparent;
    border: none;
    border-radius: 16px;
    color: #e8ecf3;
    display: flex;
    align-items: flex-start;
    gap: 14px;
    text-align: left;
    cursor: pointer;
}

.chat-model-item:hover {
    background: rgba(255, 255, 255, 0.04);
}

.chat-model-item-copy {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.chat-model-item-copy strong {
    font-size: 18px;
    font-weight: 600;
    color: #f6f8fd;
}

.chat-model-item-copy span {
    color: rgba(230, 234, 242, 0.68);
    font-size: 15px;
    line-height: 1.42;
}

.chat-model-item-check {
    width: 28px;
    height: 28px;
    display: grid;
    place-items: center;
    color: transparent;
    flex-shrink: 0;
    margin-top: 2px;
}

.chat-model-item.active .chat-model-item-check {
    color: #8f8df8;
}

.chat-model-more {
    width: 100%;
    margin-top: 8px;
    padding: 14px 2px 4px;
    border: none;
    background: transparent;
    color: #f0f2f8;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
}

.chat-model-more .material-icons-round {
    color: rgba(230, 234, 242, 0.68);
}

.chat-create-account-btn {
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    border-radius: 999px;
    padding: 8px 12px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.chat-create-account-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

.chat-create-account-btn .material-icons-round {
    font-size: 16px;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.chat-msg-wrapper {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-width: 85%;
}

.chat-msg.user .chat-msg-wrapper {
    align-items: flex-end;
}

.chat-msg-content {
    background: var(--bg-glass);
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
    border: 1px solid var(--border);
    width: fit-content;
}

.chat-msg.user .chat-msg-content {
    background: var(--accent-soft);
    border-color: var(--accent-glow);
}

.chat-msg-images {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 8px;
}

.chat-msg-img {
    max-width: 100%;
    width: auto;
    height: auto;
    border-radius: 10px;
    object-fit: contain;
    cursor: pointer;
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition);
    display: block;
}

.chat-msg-img:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

/* When message contains generated image, content box must stretch to show full image */
.chat-msg-content:has(.chat-msg-img) {
    width: 100%;
    max-width: 100%;
}

.chat-msg-utils {
    display: flex;
    gap: 8px;
    opacity: 0;
    transition: opacity var(--transition);
    padding: 0 4px;
}

.chat-msg:hover .chat-msg-utils {
    opacity: 1;
}

.chat-util-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.chat-util-btn:hover {
    background: var(--bg-hover);
    color: var(--accent);
}

.chat-util-btn.success {
    color: #4cd137;
}

.chat-tts-btn[data-state="playing"] {
    color: #7db4ff;
}

.chat-tts-btn:disabled {
    opacity: 0.75;
    cursor: wait;
}

.chat-util-btn .material-icons-round {
    font-size: 16px;
}

/* Markdown Rendering */
.chat-text {
    word-break: break-word;
}

.chat-code-block {
    background: #1e1e1e;
    border-radius: 8px;
    margin: 8px 0;
    overflow-x: auto;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.chat-code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 12px 0;
}

.chat-code-label {
    font-size: 12px;
    font-weight: 600;
    text-transform: lowercase;
    letter-spacing: 0.02em;
    color: rgba(255, 255, 255, 0.72);
}

.chat-code-copy-btn {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
    border-radius: 999px;
    padding: 6px 10px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    transition: background var(--transition), color var(--transition), border-color var(--transition);
    font-size: 12px;
    font-weight: 600;
}

.chat-code-copy-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.18);
}

.chat-code-copy-btn.success {
    color: #4cd137;
    border-color: rgba(76, 209, 55, 0.35);
}

.chat-code-copy-btn .material-icons-round {
    font-size: 14px;
}

.chat-code-block pre {
    margin: 0;
    padding: 12px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 13px;
    color: #dcdcdc;
    line-height: 1.4;
}

.chat-inline-code {
    background: rgba(0, 0, 0, 0.2);
    padding: 2px 5px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.9em;
    color: var(--accent);
}

.chat-list {
    margin: 8px 0;
    padding-left: 24px;
}

.chat-list-item {
    margin-bottom: 4px;
}

.chat-input-container {
    padding: 0 24px 24px;
}

.chat-input-box {
    background: var(--bg-glass-heavy);
    border: 1px solid var(--border-light);
    border-radius: 24px;
    padding: 8px 16px;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow);
}

.chat-image-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px 0;
}

.chat-preview-item {
    position: relative;
    width: 60px;
    height: 60px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.chat-preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.chat-preview-remove {
    position: absolute;
    top: 2px;
    right: 2px;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 14px;
    transition: background var(--transition);
}

.chat-preview-remove:hover {
    background: rgba(255, 0, 0, 0.7);
}

.chat-input-box textarea {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
    padding: 8px 0;
    resize: none;
    max-height: 200px;
    outline: none;
}

.chat-input-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 4px;
}

.chat-input-actions {
    display: flex;
    gap: 12px;
    color: var(--text-muted);
    align-items: center;
}

.chat-input-actions span {
    cursor: pointer;
    font-size: 20px;
}

.chat-input-actions span:hover {
    color: var(--text-secondary);
}

.chat-action-btn {
    border: none;
    background: transparent;
    color: inherit;
    cursor: pointer;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.chat-action-btn .material-icons-round {
    font-size: 20px;
}

.chat-action-btn:hover {
    color: var(--text-secondary);
}

.chat-action-btn:disabled {
    opacity: 0.7;
    cursor: wait;
}

.chat-music-btn.is-loading {
    color: var(--accent);
}

.chat-image-gen-btn.is-loading {
    color: var(--accent);
}

.chat-image-model-picker {
    position: relative;
    z-index: 10;
}

.chat-image-model-trigger {
    max-width: 160px;
    height: 34px;
    padding: 0 10px 0 12px;
    border: none;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.03);
    color: rgba(236, 239, 245, 0.86);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 700;
}

.chat-image-model-trigger span:first-child {
    min-width: 0;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.chat-image-model-trigger .material-icons-round {
    font-size: 17px;
    flex-shrink: 0;
}

.chat-image-model-menu {
    position: absolute;
    left: 0;
    bottom: calc(100% + 12px);
    width: 360px;
    max-height: 430px;
    overflow-y: auto;
    padding: 10px;
    border-radius: 18px;
    background: rgba(31, 31, 35, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
    backdrop-filter: blur(18px);
}

.chat-image-model-item {
    width: 100%;
    padding: 10px 8px 10px 12px;
    border: none;
    border-radius: 12px;
    background: transparent;
    color: #f7f9ff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    text-align: left;
    cursor: pointer;
}

.chat-image-model-item:hover {
    background: rgba(255, 255, 255, 0.04);
}

.chat-image-model-copy {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.chat-image-model-copy strong {
    font-size: 14px;
    font-weight: 700;
}

.chat-image-model-copy small {
    color: rgba(226, 229, 238, 0.6);
    font-size: 11px;
    line-height: 1.35;
}

.chat-premium-mark {
    color: #90d7ff;
}

.chat-image-model-item > .material-icons-round {
    color: transparent;
    font-size: 18px;
}

.chat-image-model-item.active > .material-icons-round {
    color: #8f8df8;
}

.chat-aspect-picker {
    position: relative;
    z-index: 10;
}

.chat-aspect-trigger {
    width: auto;
    min-width: 44px;
    padding: 0 10px;
    color: rgba(236, 239, 245, 0.86);
    font-size: 12px;
    font-weight: 700;
}

.chat-aspect-trigger[aria-expanded="true"] {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
}

.chat-aspect-menu {
    position: absolute;
    left: 0;
    bottom: calc(100% + 12px);
    width: 148px;
    padding: 8px;
    border-radius: 16px;
    background: rgba(31, 31, 35, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 20px 54px rgba(0, 0, 0, 0.38);
    backdrop-filter: blur(18px);
}

.chat-aspect-item {
    width: 100%;
    height: 38px;
    padding: 0 8px 0 10px;
    border: none;
    border-radius: 10px;
    background: transparent;
    color: #f7f9ff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
}

.chat-aspect-item:hover {
    background: rgba(255, 255, 255, 0.04);
}

.chat-aspect-item .material-icons-round {
    font-size: 18px;
    color: transparent;
}

.chat-aspect-item.active .material-icons-round {
    color: #8f8df8;
}

.chat-music-btn.is-disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

#chat-send-btn {
    background: transparent;
    border: none;
    color: var(--accent);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4px;
    border-radius: 50%;
    transition: background var(--transition);
}

#chat-send-btn:hover {
    background: var(--bg-hover);
}
/* === Premium chat motion overrides === */
#chat-messages.chat-messages,
.chat-messages {
    scroll-behavior: smooth;
    overscroll-behavior: contain;
    overflow-anchor: none;
}

.chat-msg,
.chat-message {
    opacity: 1;
    transform: translateY(0);
}

.chat-message {
    max-width: 85%;
}

.chat-message.is-entering {
    animation: chatMessageEntrancePremium 0.34s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.chat-message.is-entering .chat-msg-content {
    animation: chatBubbleEntrancePremium 0.36s cubic-bezier(0.22, 1, 0.36, 1) both, chatBubbleShadowPulsePremium 0.56s ease-out both;
    transform-origin: bottom left;
}

.chat-message.user.is-entering .chat-msg-content {
    transform-origin: bottom right;
}

.chat-message.is-exiting {
    opacity: 0;
    transform: translateY(6px) scale(0.985);
    transition: opacity 0.16s ease, transform 0.16s ease;
}

.chat-msg-content {
    border-radius: 16px;
    line-height: 1.55;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.22);
    backdrop-filter: blur(18px);
    will-change: transform, opacity, box-shadow;
}

.chat-msg.ai .chat-msg-content,
.chat-message.ai .chat-msg-content {
    background: linear-gradient(180deg, rgba(34, 35, 56, 0.88), rgba(25, 26, 44, 0.78));
}

.chat-msg.user .chat-msg-content,
.chat-message.user .chat-msg-content {
    background: linear-gradient(180deg, rgba(108, 92, 231, 0.32), rgba(108, 92, 231, 0.22));
    border-color: rgba(167, 139, 250, 0.35);
}

.chat-msg-avatar {
    background: linear-gradient(135deg, #4285f4, #5ca7ff);
    box-shadow: 0 8px 18px rgba(66, 133, 244, 0.22);
}

.chat-msg.user .chat-msg-avatar,
.chat-message.user .chat-msg-avatar {
    background: linear-gradient(135deg, var(--accent), #8f7cff);
    box-shadow: 0 8px 18px rgba(108, 92, 231, 0.26);
}

.chat-text:empty {
    display: none;
}

.chat-text.is-typing {
    white-space: pre-wrap;
}

.chat-text.is-typing::after {
    content: "";
    display: inline-block;
    width: 1px;
    height: 1.05em;
    margin-left: 2px;
    background: rgba(255, 255, 255, 0.85);
    vertical-align: text-bottom;
    animation: chatCursorBlinkPremium 0.95s steps(1) infinite;
}

.chat-typing-indicator .chat-msg-content {
    min-width: 68px;
    padding: 12px 14px;
}

.chat-typing-dots {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 18px;
}

.chat-typing-dots span {
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: rgba(232, 232, 240, 0.72);
    animation: chatTypingDotPremium 1.1s cubic-bezier(0.16, 1, 0.3, 1) infinite;
    transform: translateY(0) scale(0.92);
}

.chat-typing-dots span:nth-child(2) {
    animation-delay: 0.14s;
}

.chat-typing-dots span:nth-child(3) {
    animation-delay: 0.28s;
}

@keyframes chatMessageEntrancePremium {
    from {
        opacity: 0;
        transform: translateY(14px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes chatBubbleEntrancePremium {
    from {
        opacity: 0;
        transform: translateY(10px) scale(0.95);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes chatBubbleShadowPulsePremium {
    0% {
        box-shadow: 0 0 0 rgba(108, 92, 231, 0);
    }

    45% {
        box-shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
    }

    100% {
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.22);
    }
}

@keyframes chatTypingDotPremium {
    0%,
    60%,
    100% {
        transform: translateY(0) scale(0.92);
        opacity: 0.45;
    }

    30% {
        transform: translateY(-4px) scale(1.08);
        opacity: 1;
    }
}

@keyframes chatCursorBlinkPremium {
    0%,
    49% {
        opacity: 1;
    }

    50%,
    100% {
        opacity: 0;
    }
}

/* === Chat AI refreshed layout === */
.app-chat-ai {
    position: relative;
    display: flex;
    width: 100%;
    height: 100%;
    min-height: 100%;
    background:
        radial-gradient(circle at top center, rgba(255, 255, 255, 0.035), transparent 34%),
        linear-gradient(180deg, #1d1d1f 0%, #18181b 42%, #151517 100%);
    color: #f5f7fb;
    overflow: hidden;
}

.chat-sidebar {
    width: 286px;
    padding: 18px 16px 16px;
    background: rgba(15, 15, 18, 0.78);
    border-right: 1px solid rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(22px);
    display: flex;
    flex-direction: column;
    gap: 16px;
    flex-shrink: 0;
}

.chat-sidebar-brand {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chat-sidebar-search {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 12px;
    height: 42px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    background: rgba(255, 255, 255, 0.03);
    color: rgba(232, 236, 244, 0.72);
}

.chat-sidebar-search input {
    flex: 1;
    min-width: 0;
    background: transparent;
    border: none;
    outline: none;
    color: #f5f7fb;
    font-size: 14px;
}

.chat-sidebar-search input::placeholder {
    color: rgba(232, 236, 244, 0.48);
}

.chat-brand-mark {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, #7b61ff, #5b5fe8 55%, #9b87ff);
    color: #fff;
    box-shadow: 0 10px 30px rgba(91, 95, 232, 0.3);
}

.chat-brand-mark .material-icons-round,
.chat-sidebar-toggle .material-icons-round,
.chat-nav-item .material-icons-round,
.chat-project-icon .material-icons-round,
.chat-section-chevron .material-icons-round,
.chat-inline-mode .material-icons-round,
.chat-create-account-btn .material-icons-round,
.chat-upload-btn .material-icons-round,
#chat-send-btn .material-icons-round {
    font-size: 20px;
}

.chat-sidebar-toggle {
    width: 34px;
    height: 34px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 11px;
    background: rgba(255, 255, 255, 0.03);
    color: rgba(255, 255, 255, 0.86);
    display: grid;
    place-items: center;
    cursor: pointer;
}

.chat-sidebar-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.chat-nav-item {
    width: 100%;
    padding: 11px 12px;
    border: 1px solid transparent;
    border-radius: 16px;
    background: transparent;
    color: rgba(243, 245, 250, 0.92);
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    text-align: left;
    font-size: 14px;
    font-weight: 500;
}

.chat-nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.06);
}

.chat-nav-primary {
    background: rgba(255, 255, 255, 0.045);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.chat-sidebar-section {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.chat-sidebar-section-fill {
    flex: 1;
    min-height: 0;
}

.chat-sidebar-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chat-sidebar-section-title,
.chat-sidebar-subtitle {
    color: rgba(232, 236, 244, 0.72);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: none;
}

.chat-sidebar-subtitle {
    padding-top: 4px;
}

.chat-section-chevron {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 999px;
    background: transparent;
    color: rgba(232, 236, 244, 0.68);
    cursor: pointer;
    display: grid;
    place-items: center;
}

.chat-project-card {
    width: 100%;
    padding: 12px;
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
    color: #f6f8ff;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    text-align: left;
}

.chat-project-card:hover {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03));
}

.chat-project-icon {
    width: 36px;
    height: 36px;
    border-radius: 12px;
    background: rgba(108, 92, 231, 0.18);
    color: #bfb1ff;
    display: grid;
    place-items: center;
    flex-shrink: 0;
}

.chat-project-meta {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.chat-project-name {
    font-size: 14px;
    font-weight: 600;
}

.chat-project-desc {
    font-size: 12px;
    line-height: 1.35;
    color: rgba(231, 235, 243, 0.66);
}

.chat-history {
    display: flex;
    flex-direction: column;
    gap: 4px;
    overflow: auto;
    padding-right: 2px;
}

.chat-history-empty {
    padding: 14px 12px;
    color: rgba(232, 236, 244, 0.5);
    font-size: 13px;
}

.chat-history-item {
    padding: 11px 12px;
    border-radius: 14px;
    color: rgba(241, 244, 249, 0.9);
    background: transparent;
    border: 1px solid transparent;
    gap: 10px;
}

.chat-history-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.06);
}

.chat-history-item.active {
    background: rgba(108, 92, 231, 0.2);
    color: #fff;
    border-color: rgba(167, 139, 250, 0.22);
}

.chat-item-title {
    font-size: 14px;
    font-weight: 500;
}

.chat-item-body {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.chat-item-preview {
    color: rgba(232, 236, 244, 0.54);
    font-size: 12px;
    line-height: 1.3;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-item-bullet {
    width: 22px;
    height: 22px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: rgba(232, 236, 244, 0.7);
    flex-shrink: 0;
}

.chat-item-delete {
    opacity: 0;
}

.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background:
        radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.045), transparent 32%),
        linear-gradient(180deg, #232325 0%, #1f1f22 55%, #1b1b1d 100%);
}

.chat-header {
    height: 72px;
    padding: 0 18px 0 22px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    background: rgba(24, 24, 28, 0.7);
    backdrop-filter: blur(18px);
    position: relative;
    z-index: 20;
}

.chat-model-selector-container {
    min-width: 0;
}

.chat-model-select {
    min-width: 168px;
    border: none;
    background: transparent;
    border-radius: 0;
    color: #f5f7fb;
    padding: 0 28px 0 0;
    font-size: 18px;
    font-weight: 700;
    background-image: url('data:image/svg+xml;utf8,<svg fill="white" height="24" viewBox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5z"/></svg>');
    background-repeat: no-repeat;
    background-position: right center;
    background-size: 18px;
}

.chat-model-select:hover,
.chat-model-select:focus {
    border: none;
    box-shadow: none;
    background-color: transparent;
}

.chat-create-account-btn {
    width: 34px;
    height: 34px;
    padding: 0;
    justify-content: center;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.04);
}

.chat-header-action-text {
    display: none;
}

.chat-sidebar-collapsed .chat-sidebar {
    width: 96px;
    padding-inline: 10px;
}

.chat-sidebar-collapsed .chat-sidebar-search,
.chat-sidebar-collapsed .chat-sidebar-actions span:last-child,
.chat-sidebar-collapsed .chat-sidebar-section,
.chat-sidebar-collapsed .chat-nav-item span:last-child,
.chat-sidebar-collapsed .chat-project-meta {
    display: none;
}

.chat-sidebar-collapsed .chat-nav-item,
.chat-sidebar-collapsed .chat-project-card {
    justify-content: center;
    padding-inline: 0;
}

.chat-sidebar-collapsed .chat-sidebar-brand {
    justify-content: center;
}

.chat-workspace {
    position: relative;
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-empty-state {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    opacity: 1;
    transition: opacity 0.18s ease;
}

.chat-empty-copy {
    transform: translateY(-58px);
    text-align: center;
}

.chat-empty-copy h1 {
    margin: 0;
    color: #fbfdff;
    font-size: clamp(2.2rem, 4vw, 4.2rem);
    line-height: 1.05;
    font-weight: 500;
    letter-spacing: -0.04em;
}

.chat-workspace.is-active .chat-empty-state {
    opacity: 0;
}

.chat-messages {
    position: relative;
    z-index: 1;
    flex: 1;
    overflow-y: auto;
    padding: 22px 22px 176px;
    gap: 18px;
}

.chat-workspace.is-empty .chat-messages {
    opacity: 0;
    pointer-events: none;
}

.chat-input-container {
    position: absolute;
    left: 50%;
    bottom: 26px;
    width: min(100%, 980px);
    transform: translateX(-50%);
    padding: 0 22px;
    z-index: 2;
}

.chat-workspace.is-empty .chat-input-container {
    top: 50%;
    bottom: auto;
    transform: translate(-50%, 90px);
    width: min(100%, 980px);
}

.chat-input-box {
    border-radius: 30px;
    padding: 14px 16px 12px;
    background: rgba(47, 47, 54, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
    backdrop-filter: blur(16px);
}

.chat-image-preview {
    padding: 0 0 10px;
}

.chat-preview-item {
    width: 72px;
    height: 72px;
    border-radius: 14px;
}

.chat-input-box textarea {
    min-height: 44px;
    max-height: 160px;
    padding: 10px 0 8px;
    font-size: 15px;
    color: #f6f7fb;
}

.chat-input-box textarea::placeholder {
    color: rgba(237, 240, 245, 0.45);
}

.chat-input-toolbar {
    padding-top: 8px;
    gap: 16px;
}

.chat-input-actions {
    gap: 10px;
}

.chat-action-btn,
.chat-upload-btn,
.chat-inline-mode,
.chat-section-chevron {
    color: rgba(236, 239, 245, 0.78);
}

.chat-action-btn,
.chat-upload-btn,
.chat-inline-mode {
    width: 34px;
    height: 34px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: rgba(255, 255, 255, 0.03);
    cursor: pointer;
}

.chat-upload-btn {
    width: 34px;
    height: 34px;
}

.chat-input-meta {
    display: flex;
    align-items: center;
    gap: 10px;
}

.chat-mode-picker {
    position: relative;
    z-index: 10;
}

.chat-inline-mode {
    min-width: 92px;
    width: auto;
    padding: 0 12px;
    gap: 4px;
    color: #f3f5fb;
    font-size: 14px;
    font-weight: 500;
    border-radius: 999px;
}

.chat-inline-mode .material-icons-round {
    font-size: 18px;
    transition: transform 0.16s ease;
}

.chat-inline-mode[aria-expanded="true"] .material-icons-round {
    transform: rotate(180deg);
}

.chat-mode-menu {
    position: absolute;
    right: -92px;
    bottom: calc(100% + 12px);
    width: 360px;
    padding: 12px;
    border-radius: 20px;
    background: rgba(31, 31, 35, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
    backdrop-filter: blur(18px);
}

.chat-mode-item {
    width: 100%;
    height: 58px;
    padding: 0 10px 0 12px;
    border: none;
    border-radius: 12px;
    background: transparent;
    color: #f7f9ff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
}

.chat-mode-item:hover {
    background: rgba(255, 255, 255, 0.04);
}

.chat-mode-item .material-icons-round {
    font-size: 20px;
    color: transparent;
}

.chat-mode-item.active .material-icons-round {
    color: #8f8df8;
}

#chat-send-btn {
    width: 38px;
    height: 38px;
    border-radius: 999px;
    background: #5f5eea;
    color: #fff;
    box-shadow: 0 12px 24px rgba(95, 94, 234, 0.26);
}

#chat-send-btn:hover {
    background: #7372ef;
}

@media (max-width: 1100px) {
    .chat-sidebar {
        width: 248px;
    }

    .chat-header {
        padding-left: 16px;
    }
}

@media (max-width: 860px) {
    .chat-sidebar {
        display: none;
    }

    .chat-input-container {
        width: calc(100% - 20px);
        padding: 0 10px;
    }
}

/* Final message layout guard for the refreshed Chat AI surface. */
.app-chat-ai .chat-msg,
.app-chat-ai .chat-message {
    width: 100%;
    max-width: 100%;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.app-chat-ai .chat-msg.ai,
.app-chat-ai .chat-message.ai {
    justify-content: flex-start;
}

.app-chat-ai .chat-msg.user,
.app-chat-ai .chat-message.user {
    justify-content: flex-start;
    flex-direction: row-reverse;
}

.app-chat-ai .chat-msg-avatar {
    width: 32px;
    height: 32px;
    min-width: 32px;
    max-width: 32px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    overflow: hidden;
    background: #3f8cff;
    color: #fff;
    box-shadow: none;
    flex: 0 0 32px;
}

.app-chat-ai .chat-msg-avatar .material-icons-round {
    font-size: 18px;
    line-height: 1;
}

.app-chat-ai .chat-msg.user .chat-msg-avatar,
.app-chat-ai .chat-message.user .chat-msg-avatar {
    background: #6e63ee;
}

.app-chat-ai .chat-msg-wrapper {
    width: auto;
    max-width: min(720px, calc(100% - 58px));
    display: flex;
    flex-direction: column;
    gap: 6px;
    align-items: flex-start;
}

/* Wrapper with generated image should stretch full available width */
.app-chat-ai .chat-msg-wrapper:has(.chat-msg-img) {
    width: min(720px, calc(100% - 58px));
}

/* Content box must not shrink when showing generated images */
.app-chat-ai .chat-msg-content:has(.chat-msg-img) {
    width: 100%;
    max-width: 100%;
}

.app-chat-ai .chat-msg.user .chat-msg-wrapper,
.app-chat-ai .chat-message.user .chat-msg-wrapper {
    align-items: flex-end;
}

.app-chat-ai .chat-msg-content {
    width: fit-content;
    max-width: 100%;
    padding: 12px 15px;
    border-radius: 16px;
    background: rgba(34, 35, 42, 0.94);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: #f5f7fb;
    box-shadow: 0 12px 26px rgba(0, 0, 0, 0.22);
}

.app-chat-ai .chat-msg.ai .chat-msg-content,
.app-chat-ai .chat-message.ai .chat-msg-content {
    background: rgba(35, 36, 44, 0.94);
}

.app-chat-ai .chat-msg.user .chat-msg-content,
.app-chat-ai .chat-message.user .chat-msg-content {
    background: rgba(84, 76, 154, 0.78);
    border-color: rgba(154, 146, 255, 0.28);
}

.app-chat-ai .chat-thought-status {
    margin-top: 2px;
    padding: 4px 2px;
    border: none;
    background: transparent;
    color: rgba(226, 229, 238, 0.68);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font: inherit;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
}

.app-chat-ai .chat-thought-status:hover {
    color: rgba(246, 248, 255, 0.9);
}

.app-chat-ai .chat-thought-icon {
    width: 20px;
    height: 20px;
    border: 2px solid currentColor;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-size: 13px;
    line-height: 1;
}

.app-chat-ai .chat-thought-chevron {
    font-size: 20px;
}

@media (prefers-reduced-motion: reduce) {
    .chat-messages {
        scroll-behavior: auto;
    }

    .chat-message.is-entering,
    .chat-message.is-entering .chat-msg-content,
    .chat-typing-dots span,
    .chat-text.is-typing::after {
        animation: none !important;
    }

    .chat-message.is-exiting {
        transition: none;
    }
}

/* === Scrollable Model List === */
.chat-model-menu {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    width: min(560px, calc(100vw - 40px));
    padding: 18px;
    border-radius: 26px;
    background: rgba(31, 31, 35, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.06);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.42);
    backdrop-filter: blur(20px);
    z-index: 30;
    pointer-events: auto;
    max-height: min(65vh, 500px); /* ⭐ Giới hạn chiều cao */
    display: flex;
    flex-direction: column;
}

.chat-model-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
    overflow-y: auto; /* ⭐ Cho phép cuộn dọc */
    overflow-x: hidden;
    padding-right: 6px; /* ⭐ Padding cho scrollbar */
    flex: 1; /* ⭐ Chiếm không gian còn lại */
    min-height: 0; /* ⭐ Quan trọng cho flex scroll */
}

/* Custom Scrollbar cho model list */
.chat-model-list::-webkit-scrollbar {
    width: 6px;
}

.chat-model-list::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
}

.chat-model-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    transition: background 0.2s;
}

.chat-model-list::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* Firefox scrollbar */
.chat-model-list {
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.15) rgba(255, 255, 255, 0.03);
}

/* Model menu head không cuộn */
.chat-model-menu-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 14px;
    flex-shrink: 0; /* ⭐ Không bị cuộn */
}

/* Expand more models button cố định ở dưới */
.chat-model-more {
    width: 100%;
    margin-top: 12px;
    padding: 14px 2px 4px;
    border: none;
    background: transparent;
    color: #f0f2f8;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    flex-shrink: 0; /* ⭐ Không bị cuộn */
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 12px;
}

.chat-model-more .material-icons-round {
    color: rgba(230, 234, 242, 0.68);
    transition: transform 0.2s;
}

.chat-model-more[aria-expanded="true"] .material-icons-round {
    transform: rotate(180deg);
}

/* More models section */
.chat-more-models-section {
    margin-top: 8px;
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    flex-shrink: 0;
}

.chat-more-models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 8px;
    margin: 12px 0;
    max-height: 300px; /* ⭐ Giới hạn chiều cao grid */
    overflow-y: auto; /* ⭐ Scroll nếu nhiều model */
    padding-right: 6px;
}

.chat-more-models-grid::-webkit-scrollbar {
    width: 6px;
}

.chat-more-models-grid::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
}

.chat-more-models-grid::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 10px;
}

.chat-more-models-footer {
    padding: 8px 0 0;
    font-size: 11px;
    color: var(--text-secondary);
    border-top: 1px dashed var(--border-color);
}

.chat-more-model-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s;
    width: 100%;
}

.chat-more-model-item:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.chat-more-model-item.active {
    background: rgba(108, 92, 231, 0.2);
    border-color: rgba(167, 139, 250, 0.3);
}

.chat-model-icon {
    font-size: 20px;
    flex-shrink: 0;
}

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

.chat-model-info strong {
    display: block;
    font-size: 14px;
    margin-bottom: 2px;
    color: #f6f8fd;
}

.chat-model-info small {
    display: block;
    font-size: 11px;
    color: rgba(230, 234, 242, 0.68);
    line-height: 1.3;
}

.chat-model-provider {
    display: inline-block;
    font-size: 10px;
    padding: 2px 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 4px;
    margin-top: 4px;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.6);
}

.check-icon {
    color: #8f8df8;
    font-size: 18px;
    flex-shrink: 0;
}

/* === CHAT AI CORE === */
.app-chat-ai { position: relative; display: flex; width: 100%; height: 100%; min-height: 100%; background: radial-gradient(circle at top center, rgba(255,255,255,0.035), transparent 34%), linear-gradient(180deg, #1d1d1f 0%, #18181b 42%, #151517 100%); color: #f5f7fb; overflow: hidden; }
.chat-sidebar { width: 286px; padding: 18px 16px 16px; background: rgba(15,15,18,0.78); border-right: 1px solid rgba(255,255,255,0.06); backdrop-filter: blur(22px); display: flex; flex-direction: column; gap: 16px; flex-shrink: 0; }
.chat-main { flex: 1; display: flex; flex-direction: column; min-width: 0; background: radial-gradient(circle at 50% 0%, rgba(255,255,255,0.045), transparent 32%), linear-gradient(180deg, #232325 0%, #1f1f22 55%, #1b1b1d 100%); }
.chat-header { height: 72px; padding: 0 18px 0 22px; border-bottom: 1px solid rgba(255,255,255,0.04); background: rgba(24,24,28,0.7); backdrop-filter: blur(18px); position: relative; z-index: 20; }
.chat-messages { position: relative; z-index: 1; flex: 1; overflow-y: auto; padding: 22px 22px 176px; gap: 18px; scroll-behavior: smooth; }
.chat-input-container { position: absolute; left: 50%; bottom: 26px; width: min(100%, 980px); transform: translateX(-50%); padding: 0 22px; z-index: 2; }

/* === SCROLLABLE MODEL MENU === */
.chat-model-menu {
    position: absolute; top: calc(100% + 12px); left: 0;
    width: min(560px, calc(100vw - 40px));
    padding: 18px; border-radius: 26px;
    background: rgba(31, 31, 35, 0.98); border: 1px solid rgba(255,255,255,0.06);
    box-shadow: 0 30px 80px rgba(0,0,0,0.42); backdrop-filter: blur(20px);
    z-index: 30; pointer-events: auto;
    max-height: min(65vh, 520px);
    display: flex; flex-direction: column;
}
.chat-model-menu-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 14px; flex-shrink: 0; }
.chat-model-list {
    display: flex; flex-direction: column; gap: 4px;
    overflow-y: auto; overflow-x: hidden;
    padding-right: 6px; flex: 1; min-height: 0;
    scrollbar-width: thin; scrollbar-color: rgba(255,255,255,0.15) rgba(255,255,255,0.03);
}
.chat-model-list::-webkit-scrollbar { width: 6px; }
.chat-model-list::-webkit-scrollbar-track { background: rgba(255,255,255,0.03); border-radius: 10px; }
.chat-model-list::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 10px; transition: background 0.2s; }
.chat-model-list::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.25); }

.chat-model-item { width: 100%; padding: 12px 12px 12px 0; background: transparent; border: none; border-radius: 16px; color: #e8ecf3; display: flex; align-items: flex-start; gap: 14px; text-align: left; cursor: pointer; }
.chat-model-item:hover { background: rgba(255,255,255,0.04); }
.chat-model-item-copy { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.chat-model-item-copy strong { font-size: 18px; font-weight: 600; color: #f6f8fd; }
.chat-model-item-copy span { color: rgba(230,234,242,0.68); font-size: 15px; line-height: 1.42; }
.chat-model-item-check { width: 28px; height: 28px; display: grid; place-items: center; color: transparent; flex-shrink: 0; margin-top: 2px; }
.chat-model-item.active .chat-model-item-check { color: #8f8df8; }

/* === EXPAND MORE MODELS SECTION === */
.chat-model-more {
    width: 100%; margin-top: 12px; padding: 14px 2px 4px;
    border: none; background: transparent; color: #f0f2f8;
    display: flex; align-items: center; justify-content: space-between;
    font-size: 17px; font-weight: 600; cursor: pointer; flex-shrink: 0;
    border-top: 1px solid rgba(255,255,255,0.06); padding-top: 12px;
}
.chat-model-more .material-icons-round { color: rgba(230,234,242,0.68); transition: transform 0.2s; }
.chat-model-more[aria-expanded="true"] .material-icons-round { transform: rotate(180deg); }

.chat-more-models-section { margin-top: 8px; padding-top: 12px; border-top: 1px solid rgba(255,255,255,0.06); flex-shrink: 0; }
.chat-more-models-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 8px; margin: 12px 0;
    max-height: 300px; overflow-y: auto; padding-right: 6px;
    scrollbar-width: thin; scrollbar-color: rgba(255,255,255,0.15) rgba(255,255,255,0.03);
}
.chat-more-models-grid::-webkit-scrollbar { width: 6px; }
.chat-more-models-grid::-webkit-scrollbar-track { background: rgba(255,255,255,0.03); border-radius: 10px; }
.chat-more-models-grid::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 10px; }

.chat-more-model-item {
    display: flex; align-items: center; gap: 10px; padding: 10px 12px;
    background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06);
    border-radius: 10px; cursor: pointer; text-align: left; transition: all 0.2s; width: 100%;
}
.chat-more-model-item:hover { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.1); transform: translateY(-1px); }
.chat-more-model-item.active { background: rgba(108,92,231,0.2); border-color: rgba(167,139,250,0.3); }
.chat-model-icon { font-size: 20px; flex-shrink: 0; }
.chat-model-info { flex: 1; min-width: 0; }
.chat-model-info strong { display: block; font-size: 14px; margin-bottom: 2px; color: #f6f8fd; }
.chat-model-info small { display: block; font-size: 11px; color: rgba(230,234,242,0.68); line-height: 1.3; }
.chat-model-provider { display: inline-block; font-size: 10px; padding: 2px 6px; background: rgba(255,255,255,0.08); border-radius: 4px; margin-top: 4px; text-transform: uppercase; color: rgba(255,255,255,0.6); }
.check-icon { color: #8f8df8; font-size: 18px; flex-shrink: 0; }
.chat-more-models-footer { padding: 8px 0 0; font-size: 11px; color: var(--text-secondary); border-top: 1px dashed var(--border-color); }

/* === MESSAGES & UI === */
.chat-msg, .chat-message { width: 100%; max-width: 100%; display: flex; align-items: flex-start; gap: 10px; }
.chat-msg.user, .chat-message.user { flex-direction: row-reverse; }
.chat-msg-avatar { width: 32px; height: 32px; min-width: 32px; max-width: 32px; border-radius: 50%; display: grid; place-items: center; overflow: hidden; background: #3f8cff; color: #fff; flex: 0 0 32px; }
.chat-msg.user .chat-msg-avatar { background: #6e63ee; }
.chat-msg-wrapper { width: auto; max-width: min(720px, calc(100% - 58px)); display: flex; flex-direction: column; gap: 6px; align-items: flex-start; }
.chat-msg.user .chat-msg-wrapper { align-items: flex-end; }
.chat-msg-content { width: fit-content; max-width: 100%; padding: 12px 15px; border-radius: 16px; background: rgba(34,35,42,0.94); border: 1px solid rgba(255,255,255,0.08); color: #f5f7fb; box-shadow: 0 12px 26px rgba(0,0,0,0.22); }
.chat-msg.user .chat-msg-content { background: rgba(84,76,154,0.78); border-color: rgba(154,146,255,0.28); }
.chat-msg-content:has(.chat-msg-img) { width: 100%; max-width: 100%; }
.chat-msg-utils { display: flex; gap: 8px; opacity: 0; transition: opacity 0.2s; padding: 0 4px; }
.chat-msg:hover .chat-msg-utils { opacity: 1; }
.chat-util-btn { background: transparent; border: none; color: var(--text-muted); cursor: pointer; padding: 4px; border-radius: 4px; display: flex; align-items: center; justify-content: center; transition: all 0.2s; }
.chat-util-btn:hover { background: var(--bg-hover); color: var(--accent); }
.chat-text { word-break: break-word; }
.chat-code-block { background: #1e1e1e; border-radius: 8px; margin: 8px 0; overflow-x: auto; border: 1px solid rgba(255,255,255,0.1); }
.chat-code-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 12px 0; }
.chat-code-label { font-size: 12px; font-weight: 600; text-transform: lowercase; letter-spacing: 0.02em; color: rgba(255,255,255,0.72); }
.chat-code-copy-btn { border: 1px solid rgba(255,255,255,0.1); background: rgba(255,255,255,0.04); color: var(--text-secondary); border-radius: 999px; padding: 6px 10px; display: inline-flex; align-items: center; gap: 6px; cursor: pointer; transition: all 0.2s; font-size: 12px; font-weight: 600; }
.chat-code-copy-btn:hover { background: rgba(255,255,255,0.1); color: var(--text-primary); }
.chat-code-block pre { margin: 0; padding: 12px; font-family: 'Consolas', monospace; font-size: 13px; color: #dcdcdc; line-height: 1.4; }
.chat-inline-code { background: rgba(0,0,0,0.2); padding: 2px 5px; border-radius: 4px; font-family: monospace; font-size: 0.9em; color: var(--accent); }
.chat-input-box { border-radius: 30px; padding: 14px 16px 12px; background: rgba(47,47,54,0.92); border: 1px solid rgba(255,255,255,0.05); box-shadow: 0 20px 50px rgba(0,0,0,0.28); backdrop-filter: blur(16px); }
.chat-input-box textarea { min-height: 44px; max-height: 160px; padding: 10px 0 8px; font-size: 15px; color: #f6f7fb; background: transparent; border: none; outline: none; width: 100%; resize: none; }
.chat-input-toolbar { display: flex; align-items: center; justify-content: space-between; padding-top: 8px; gap: 16px; }
.chat-input-actions { display: flex; gap: 10px; color: rgba(236,239,245,0.78); align-items: center; }
.chat-action-btn, .chat-upload-btn, .chat-inline-mode { width: 34px; height: 34px; border-radius: 999px; display: inline-flex; align-items: center; justify-content: center; border: none; background: rgba(255,255,255,0.03); cursor: pointer; }
.chat-action-btn:hover, .chat-upload-btn:hover { background: rgba(255,255,255,0.08); }
#chat-send-btn { width: 38px; height: 38px; border-radius: 999px; background: #5f5eea; color: #fff; box-shadow: 0 12px 24px rgba(95,94,234,0.26); border: none; cursor: pointer; }
#chat-send-btn:hover { background: #7372ef; }
.chat-image-preview { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 0 10px; }
.chat-preview-item { position: relative; width: 72px; height: 72px; border-radius: 14px; overflow: hidden; border: 1px solid var(--border); }
.chat-preview-item img { width: 100%; height: 100%; object-fit: cover; }
.chat-preview-remove { position: absolute; top: 2px; right: 2px; background: rgba(0,0,0,0.5); color: white; border-radius: 50%; width: 18px; height: 18px; display: flex; align-items: center; justify-content: center; cursor: pointer; font-size: 14px; }
.chat-preview-remove:hover { background: rgba(255,0,0,0.7); }

@media (max-width: 860px) { .chat-sidebar { display: none; } .chat-input-container { width: calc(100% - 20px); padding: 0 10px; } }