/* ==========================================================================
   Nexus Terminal — Sidebar
   Connection manager: logo, search, sections, profile list, footer.
   ========================================================================== */

/* -----------------------------------------------------------------------
   Sidebar header (logo / title / drag region)
   ----------------------------------------------------------------------- */
.sidebar-header {
    display: flex;
    align-items: center;
    padding: var(--space-3) var(--space-4);
    min-height: var(--tab-bar-height);
    border-bottom: 1px solid var(--border-subtle);
    flex-shrink: 0;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.sidebar-logo svg {
    width: 18px;
    height: 18px;
    color: var(--accent);
    flex-shrink: 0;
}

.sidebar-title {
    font-size: var(--text-sm);
    font-weight: var(--weight-semibold);
    color: var(--text-primary);
    letter-spacing: 0.02em;
}

/* -----------------------------------------------------------------------
   Sidebar search
   ----------------------------------------------------------------------- */
.sidebar-search {
    padding: var(--space-2) var(--space-3);
    flex-shrink: 0;
}

/* -----------------------------------------------------------------------
   Sidebar navigation (scrollable area)
   ----------------------------------------------------------------------- */
.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding-bottom: var(--space-2);
}

/* -----------------------------------------------------------------------
   Sections (Favourites, Recent, All Connections)
   ----------------------------------------------------------------------- */
.sidebar-section {
    /* Each section can be collapsed */
}

.sidebar-section + .sidebar-section {
    border-top: 1px solid var(--border-subtle);
}

.sidebar-section-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    width: 100%;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    cursor: pointer;
    transition: color var(--transition-fast), background var(--transition-fast);
    -webkit-user-select: none;
    user-select: none;
    text-align: left;
    background: none;
    border: none;
}

.sidebar-section-header:hover {
    color: var(--text-secondary);
    background: var(--bg-hover);
}

.sidebar-section-header .section-icon {
    width: 14px;
    text-align: center;
    flex-shrink: 0;
    font-size: var(--text-sm);
}

.sidebar-section-header .section-chevron {
    width: 12px;
    height: 12px;
    margin-right: var(--space-1);
    flex-shrink: 0;
    transition: transform var(--transition-normal);
    color: var(--text-disabled);
}

.sidebar-section.is-collapsed .section-chevron {
    transform: rotate(-90deg);
}

.section-count {
    margin-left: auto;
    font-size: 10px;
    font-weight: var(--weight-normal);
    color: var(--text-disabled);
    background: var(--bg-overlay);
    padding: 0 var(--space-1);
    border-radius: var(--radius-sm);
    min-width: 18px;
    text-align: center;
    line-height: 16px;
}

/* -----------------------------------------------------------------------
   Sidebar list (container for items)
   ----------------------------------------------------------------------- */
.sidebar-list {
    padding: 0 var(--space-2);
}

.sidebar-section.is-collapsed .sidebar-list {
    display: none;
}

/* -----------------------------------------------------------------------
   Sidebar item (individual connection profile)
   ----------------------------------------------------------------------- */
.sidebar-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-2);
    margin-bottom: 1px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition:
        background var(--transition-fast),
        box-shadow var(--transition-fast);
    user-select: none;
    position: relative;
}

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

.sidebar-item:active {
    background: var(--bg-active);
}

/* Active / selected state */
.sidebar-item.active {
    background: var(--accent-muted);
}
.sidebar-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 4px;
    bottom: 4px;
    width: 2px;
    border-radius: var(--radius-full);
    background: var(--accent);
}

/* Protocol colour indicator dot */
.sidebar-item .protocol-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
    background: var(--text-tertiary);
}
.sidebar-item .protocol-indicator.proto-ssh    { background: var(--protocol-ssh); }
.sidebar-item .protocol-indicator.proto-telnet { background: var(--protocol-telnet); }
.sidebar-item .protocol-indicator.proto-raw    { background: var(--protocol-raw); }
.sidebar-item .protocol-indicator.proto-github { background: var(--protocol-github); }

/* Text block (name + host) */
.sidebar-item-text {
    flex: 1;
    min-width: 0;
}

.sidebar-item-name {
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    color: var(--text-primary);
    line-height: var(--leading-tight);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sidebar-item-host {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    font-family: var(--font-mono);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    line-height: var(--leading-tight);
    margin-top: 1px;
}

/* Edit button (appears on hover, beside name) */
.sidebar-item-edit {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--text-disabled);
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
}

.sidebar-item:hover .sidebar-item-edit {
    opacity: 1;
}

.sidebar-item-edit:hover {
    color: var(--accent);
    background: var(--bg-hover);
}

/* Favourite star */
.sidebar-item-star {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    color: var(--text-disabled);
    border-radius: var(--radius-sm);
    opacity: 0;
    transition: opacity var(--transition-fast), color var(--transition-fast);
}

.sidebar-item:hover .sidebar-item-star {
    opacity: 1;
}

.sidebar-item-star.is-favourite {
    opacity: 1;
    color: var(--warning);
}

.sidebar-item-star:hover {
    color: var(--warning);
}

/* Inline status dot (right side, tiny) */
.sidebar-item-status {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-right: var(--space-1);
}
.sidebar-item-status.is-connected  { background: var(--success); }
.sidebar-item-status.is-connecting { background: var(--warning); animation: pulse-dot 1.2s ease infinite; }
.sidebar-item-status.is-error      { background: var(--error); }

/* -----------------------------------------------------------------------
   Sidebar empty list placeholder
   ----------------------------------------------------------------------- */
.sidebar-list-empty {
    padding: var(--space-3) var(--space-2);
    font-size: var(--text-xs);
    color: var(--text-disabled);
    text-align: center;
    font-style: italic;
}

/* -----------------------------------------------------------------------
   Sidebar footer (actions)
   ----------------------------------------------------------------------- */
.sidebar-footer {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-3);
    border-top: 1px solid var(--border-subtle);
    flex-shrink: 0;
}

.sidebar-footer .btn:first-child {
    flex: 1;
}

/* -----------------------------------------------------------------------
   Sidebar collapsed state
   ----------------------------------------------------------------------- */
.sidebar-collapsed .sidebar-header {
    justify-content: center;
    padding: var(--space-3) var(--space-2);
}
.sidebar-collapsed .sidebar-title,
.sidebar-collapsed .sidebar-search,
.sidebar-collapsed .sidebar-section-header span:not(.section-icon),
.sidebar-collapsed .sidebar-item-text,
.sidebar-collapsed .sidebar-item-star,
.sidebar-collapsed .section-count,
.sidebar-collapsed .sidebar-footer .btn:first-child span {
    display: none;
}

.sidebar-collapsed .sidebar-item {
    justify-content: center;
    padding: var(--space-2);
}

.sidebar-collapsed .sidebar-section-header {
    justify-content: center;
    padding: var(--space-2);
}

.sidebar-collapsed .sidebar-footer {
    flex-direction: column;
}