/* ═══════════════════════════════════════════════════════
   Glitrex AI — Sidebar
   ═══════════════════════════════════════════════════════ */

.app {
    display: flex;
    min-height: var(--app-height);
    height: var(--app-height);
    width: 100%;
    overflow: hidden;
}

.sidebar {
    width: var(--sidebar-width);
    min-height: var(--app-height);
    height: var(--app-height);
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-subtle);
    flex-shrink: 0;
    overflow: hidden;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 20px;
    border-bottom: 1px solid var(--border-subtle);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-text {
    font-size: 1.1rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.new-chat-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    width: calc(100% - 32px);
    margin: 14px 16px 10px;
    padding: 12px 16px;
    background: var(--gradient-subtle);
    border: 1px dashed var(--border-accent);
    border-radius: var(--radius-md);
    color: var(--accent-purple);
    font-weight: 500;
    font-size: 0.9rem;
    transition: all var(--duration-normal) var(--ease-out);
}

.new-chat-btn:hover {
    background: var(--gradient-glow);
    border-style: solid;
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
}

.sidebar-search {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 4px 16px 10px;
    padding: 10px 14px;
    background: var(--surface-1);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-tertiary);
}

.sidebar-search input {
    flex: 1;
    font-size: 0.85rem;
    color: var(--text-primary);
}

.sidebar-search input::placeholder {
    color: var(--text-tertiary);
}

/* ── Conversation List ─────────────────────────────── */
.conversations-list {
    flex: 1;
    overflow-y: auto;
    padding: 4px 8px;
}

.conv-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--duration-fast) ease;
    animation: slideIn var(--duration-normal) var(--ease-out);
    position: relative;
}

.conv-item:hover {
    background: var(--surface-2);
}

.conv-item.active {
    background: var(--gradient-subtle);
    border: 1px solid var(--border-accent);
}

.conv-item-icon {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-sm);
    background: var(--surface-2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    flex-shrink: 0;
}

.conv-item.active .conv-item-icon {
    background: rgba(139, 92, 246, 0.15);
    color: var(--accent-purple);
}

.conv-item-content {
    flex: 1;
    min-width: 0;
}

.conv-item-title {
    font-size: 0.87rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conv-item-meta {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: 2px;
}

.conv-item-delete {
    opacity: 0;
    transition: opacity var(--duration-fast) ease;
}

.conv-item:hover .conv-item-delete {
    opacity: 1;
}

/* ── Sidebar Footer (selectors) ────────────────────── */
.sidebar-footer {
    padding: 14px 16px calc(14px + var(--safe-area-bottom));
    border-top: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.select-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.select-group label {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.select-group select {
    padding: 9px 12px;
    background: var(--surface-1);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: border-color var(--duration-fast) ease;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236b6b7a' viewBox='0 0 24 24'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 30px;
}

.select-group select:focus {
    border-color: var(--accent-purple);
}

.select-group select option {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.logout-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px;
    border-radius: var(--radius-sm);
    color: var(--text-tertiary);
    font-size: 0.85rem;
    transition: all var(--duration-fast) ease;
}

.logout-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-red);
}

/* ── Mobile ────────────────────────────────────────── */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        inset: 0;
        width: 100%;
        z-index: 50;
        transform: translateX(-100%);
        transition: transform var(--duration-normal) var(--ease-out);
    }

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