body[data-page="chat"] .main-layout {
    width: 100%;
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(19rem, 0.8fr);
    align-items: start;
}

body[data-page="chat"] > .container.ui-page {
    padding-top: 0.25rem;
}

body[data-page="chat"] .main-content,
body[data-page="chat"] .chat-column {
    width: 100%;
    min-width: 0;
    max-width: none;
}

body[data-page="chat"] #chat-container {
    width: 100%;
    min-width: 0;
    max-width: none;
    min-height: 28rem;
    max-height: calc(100vh - 18rem);
    border-radius: 0.85rem;
}

body[data-page="chat"] #chat-container .message {
    min-width: 0;
    max-width: 85%;
    box-sizing: border-box;
    overflow-wrap: anywhere;
    word-break: break-word;
}

body[data-page="chat"] #chat-container .system-message,
body[data-page="chat"] #chat-container .error-message,
body[data-page="chat"] #chat-container .tool-message {
    max-width: 100%;
}

body[data-page="chat"] #chat-container .message-content,
body[data-page="chat"] #chat-container .markdown-content,
body[data-page="chat"] #chat-container .markdown-content p,
body[data-page="chat"] #chat-container .markdown-content code,
body[data-page="chat"] #chat-container .markdown-content a {
    min-width: 0;
    max-width: 100%;
    overflow-wrap: anywhere;
    word-break: break-word;
}

body[data-page="chat"] .audio-button {
    width: 2rem;
    height: 2rem;
    display: inline-grid;
    place-items: center;
    padding: 0;
    border: 1px solid transparent;
    border-radius: 0.4rem;
}

body[data-page="chat"] .audio-button svg {
    width: 1.1rem;
    height: 1.1rem;
    display: block;
}

body[data-page="chat"] .audio-button.is-playing {
    border-color: var(--color-primary-border);
    background: var(--color-primary-subtle);
}

body[data-page="chat"] .right-column {
    position: static;
    width: 100%;
    min-width: 0;
}

body[data-page="chat"] .agent-selector-container {
    width: 100%;
    display: grid;
    grid-template-columns: minmax(0, 1fr) repeat(3, 2.5rem);
    align-items: end;
    gap: 0.5rem;
}

body[data-page="chat"] .agent-select-wrapper {
    min-width: 0;
}

body[data-page="chat"] #agent-select {
    min-width: 0;
}

body[data-page="chat"] #message-form {
    padding: 0.65rem;
    border: 1px solid var(--color-border-default);
    border-radius: 0.85rem;
    background: var(--color-bg-surface);
}

body[data-page="chat"] .chat-outline-action {
    flex: 0 0 auto;
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--color-primary);
    border-radius: 0.375rem;
    background: transparent;
    color: var(--color-primary);
    box-shadow: none;
    font: inherit;
    font-weight: 600;
    line-height: 1.25;
    white-space: nowrap;
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

body[data-page="chat"] .chat-outline-action:hover:not(:disabled) {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: var(--color-on-primary);
}

body[data-page="chat"] .chat-outline-action:disabled {
    opacity: var(--opacity-disabled);
    cursor: not-allowed;
}

body[data-page="chat"] #settings-btn.chat-outline-action,
body[data-page="chat"] #mic-button.chat-outline-action {
    min-width: 2.5rem;
    padding: 0.4rem 0.65rem;
}

body[data-page="chat"] .chat-icon-action {
    width: 2.5rem;
    min-width: 2.5rem;
    height: 2.5rem;
    display: inline-grid;
    place-items: center;
    padding: 0;
}

body[data-page="chat"] .chat-icon-action svg {
    width: 1.2rem;
    height: 1.2rem;
    display: block;
}

body[data-page="chat"] #mic-button.chat-outline-action.recording {
    border-color: var(--color-danger);
    background: var(--color-danger);
    color: var(--color-on-danger);
}

body[data-page="chat"] #mic-button.chat-outline-action.recording:hover {
    border-color: var(--color-danger-hover);
    background: var(--color-danger-hover);
}

@media (max-width: 1100px) {
    body[data-page="chat"] #user-context-input { min-height: 18rem; }
}

@media (max-width: 900px) {
    body[data-page="chat"] .main-layout {
        grid-template-columns: minmax(0, 1fr);
        row-gap: 10px;
    }

    body[data-page="chat"] .right-column {
        display: contents;
    }

    body[data-page="chat"] .agent-selector-container {
        order: -1;
    }

    body[data-page="chat"] .chat-column {
        order: 0;
    }

    body[data-page="chat"] .context-card {
        order: 1;
    }
}

@media (max-width: 560px) {
    body[data-page="chat"] #chat-container { min-height: 22rem; max-height: 55vh; }
    body[data-page="chat"] #message-form { display: grid; grid-template-columns: 1fr auto auto; }
    body[data-page="chat"] #message-input { min-width: 0; }
}