/*
 * Sidebar — chats and saved recipes entry points only.
 */

.chat-sidebar {
    display: flex;
    flex-direction: column;
    width: var(--sidebar-width);
    flex-shrink: 0;
    background: var(--bg-secondary);
    border-right: 1px solid var(--chat-border);
    position: fixed;
    inset: var(--nav-height) auto 0 0;
    transform: translateX(-100%);
    z-index: 25;
    transition: transform var(--chat-transition);
}

.chat-sidebar.is-open {
    transform: translateX(0);
}

.chat-sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    padding: var(--space-4);
    border-bottom: 1px solid var(--chat-border);
}

.chat-nav-btn {
    display: block;
    width: 100%;
    text-align: left;
    padding: var(--space-3) var(--space-3);
    border: none;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--chat-text);
    font: inherit;
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: background var(--chat-transition), color var(--chat-transition);
}

.chat-nav-btn:hover,
.chat-nav-btn:focus-visible {
    background: var(--bg-hover);
    color: var(--chat-accent);
}

/* Primary "New chat" action — make it the obvious CTA in the sidebar */
.chat-nav-btn#newChatBtn {
    background: var(--chat-accent);
    color: var(--bg-primary);
    font-weight: 700;
    border: 1px solid transparent;
}

.chat-nav-btn#newChatBtn:hover,
.chat-nav-btn#newChatBtn:focus-visible {
    background: var(--chat-accent-hover);
    color: var(--bg-primary);
    transform: translateY(-1px);
}

.chat-nav-btn--quiet {
    color: var(--chat-text-secondary);
    font-weight: 400;
}

.chat-sidebar-footer {
    margin-top: auto;
    padding: var(--space-3) var(--space-4) var(--space-4);
    border-top: 1px solid var(--chat-border);
}

.chat-nav-btn--danger {
    color: var(--chat-error);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.chat-nav-btn--danger:hover,
.chat-nav-btn--danger:focus-visible {
    background: rgba(239, 68, 68, 0.1);
    color: var(--chat-error);
}

.chat-nav-btn--danger:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.chat-sidebar-list {
    flex: 1 1 auto;
    overflow-y: auto;
    padding: var(--space-3) 0;
}

.chat-sidebar-label {
    margin: 0;
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--chat-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.chat-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.chat-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 32px;
    align-items: stretch;
}

.chat-item.is-active .chat-item-open {
    color: var(--chat-text);
    background: var(--bg-hover);
}

.chat-item-open,
.chat-item-del {
    border: 0;
    background: transparent;
    color: var(--chat-text-secondary);
    cursor: pointer;
    font: inherit;
}

.chat-item-open {
    min-width: 0;
    padding: var(--space-3) var(--space-4);
    text-align: left;
}

.chat-item-open:hover {
    background: var(--bg-hover);
    color: var(--chat-text);
}

.chat-item-title {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.chat-item-time {
    display: block;
    margin-top: var(--space-1);
    font-size: var(--font-size-xs);
    color: var(--chat-text-muted);
}

.chat-item-del {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--chat-transition);
}

.chat-item:hover .chat-item-del,
.chat-item:focus-within .chat-item-del {
    opacity: 1;
}

.chat-item-del:hover {
    color: var(--chat-error);
}

.chat-empty {
    padding: var(--space-3) var(--space-4);
    color: var(--chat-text-muted);
    font-size: var(--font-size-sm);
}

.chat-sidebar-close {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: var(--space-3) var(--space-4) var(--space-4);
    padding: var(--space-2);
    border: 1px solid var(--chat-border);
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--chat-text-secondary);
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
}

.sidebar-overlay {
    position: fixed;
    inset: var(--nav-height) 0 0 0;
    background: rgba(15, 23, 42, 0.55);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--chat-transition);
    z-index: 15;
}

.sidebar-overlay.is-visible {
    opacity: 1;
    pointer-events: auto;
}

@media (min-width: 768px) {
    .chat-sidebar {
        position: static;
        transform: none;
        height: auto;
        min-height: calc(100dvh - var(--nav-height));
    }

    .chat-sidebar-close,
    .sidebar-overlay {
        display: none;
    }
}

/*
 * Guest notice — replaces the server history list for guests.
 */

.chat-guest-notice p {
    margin: 0 0 var(--space-2);
}

.chat-guest-notice a {
    color: var(--chat-accent);
    text-decoration: none;
    font-weight: 500;
}

.chat-guest-notice a:hover {
    text-decoration: underline;
}

.chat-guest-download {
    border: 1px solid var(--chat-border);
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--chat-text-secondary);
    font: inherit;
    font-size: var(--font-size-xs);
    padding: var(--space-1) var(--space-3);
    cursor: pointer;
    transition: background var(--chat-transition), color var(--chat-transition);
}

.chat-guest-download:hover,
.chat-guest-download:focus-visible {
    background: var(--bg-hover);
    color: var(--chat-accent);
}