/* ── Sidebar navigation ───────────────────────────────────────────── */
:root {
    --sidebar-w: 220px;
    --sidebar-collapsed-w: 48px;
}

/* ── Layout shift ── */
body.has-sidebar main,
body.has-sidebar footer {
    margin-left: var(--sidebar-w);
    margin-right: 0;
    width: auto;
    box-sizing: border-box;
    transition: margin-left 0.22s ease;
}
body.has-sidebar.sidebar-collapsed main,
body.has-sidebar.sidebar-collapsed footer {
    margin-left: var(--sidebar-collapsed-w);
    margin-right: 0;
}

/* ── Sidebar shell ── */
.sidebar {
    position: fixed;
    top: 0; left: 0;
    width: var(--sidebar-w);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    overflow-y: auto;
    z-index: 100;
    transition: width 0.22s ease;
    background: var(--sb-bg);
    border-right: 1px solid var(--sb-border);
    box-sizing: border-box;
}
.sidebar.collapsed {
    width: var(--sidebar-collapsed-w);
}

/* ── Logo / top strip ── */
.sidebar-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.7em 0.65em 0.5em;
    flex-shrink: 0;
    min-height: 56px;
}
.sidebar-logo-img {
    height: 36px;
    object-fit: contain;
    flex-shrink: 0;
}
.sidebar-collapse-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1em;
    opacity: 0.5;
    padding: 5px 7px;
    border-radius: 6px;
    color: var(--sb-text);
    transition: opacity 0.15s, background 0.15s;
    flex-shrink: 0;
    line-height: 1;
}
.sidebar-collapse-btn:hover { opacity: 0.9; background: var(--sb-hover); }

/* Hide labels when collapsed */
.sidebar.collapsed .sidebar-label    { display: none; }
.sidebar.collapsed .sidebar-logo-img { display: none; }
.sidebar.collapsed .sidebar-divider-label { display: none; }

/* ── Sections ── */
.sidebar-section {
    padding: 0.2em 0.45em;
}
.sidebar.collapsed .sidebar-section {
    padding: 0.2em 0;
}

/* ── Nav items ── */
.sidebar-item {
    display: flex;
    align-items: center;
    gap: 0.65em;
    padding: 0.52em 0.65em;
    border-radius: 8px;
    font-size: 0.9em;
    font-weight: 500;
    text-decoration: none;
    color: var(--sb-text);
    transition: background 0.13s, color 0.13s, opacity 0.13s;
    white-space: nowrap;
    position: relative;
    cursor: pointer;
}
.sidebar-item:hover {
    background: var(--sb-hover);
    color: var(--sb-text-active);
    opacity: 1;
}
.sidebar-item.active {
    background: var(--sb-active-bg);
    color: var(--sb-text-active);
}
.sidebar-item i {
    color: inherit;
    width: 16px;
    text-align: center;
    flex-shrink: 0;
    font-size: 0.95em;
    background: none;
}
.sidebar-item.sb-disabled {
    opacity: 0.3;
    cursor: default;
    pointer-events: none;
}

/* Collapsed: center the icon */
.sidebar.collapsed .sidebar-item {
    justify-content: center;
    padding: 0.6em 0;
    border-radius: 0;
}

/* ── Decision badge ── */
.sidebar-badge {
    position: absolute;
    top: 5px; right: 8px;
    background: #ef4444;
    color: #fff;
    font-size: 0.6em;
    font-weight: 700;
    border-radius: 50%;
    min-width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 3px;
    line-height: 1;
    pointer-events: none;
}
.sidebar.collapsed .sidebar-badge {
    top: 3px; right: 3px;
}

/* ── Dividers ── */
.sidebar-divider {
    height: 1px;
    background: var(--sb-border);
    margin: 0.4em 0.7em;
    flex-shrink: 0;
}
.sidebar.collapsed .sidebar-divider {
    margin: 0.4em 0.35em;
}

/* ── Spacer pushes user row to bottom ── */
.sidebar-spacer { flex: 1; min-height: 1em; }

/* ── User row ── */
.sidebar-user {
    padding: 0.45em 0.45em 0.65em;
    flex-shrink: 0;
}

/* ── Build / hostname meta (footer section) ── */
.sidebar-meta {
    padding: 0.45em 0.7em 0.65em;
    font-size: 0.7em;
    opacity: 0.45;
    flex-shrink: 0;
}
.sidebar-meta-line {
    line-height: 1.45;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.sidebar-meta-host { opacity: 0.75; }
.sidebar.collapsed .sidebar-meta { display: none; }

/* ── Hamburger (mobile only) ── */
.sidebar-hamburger {
    display: none;
    position: fixed;
    top: 10px; left: 10px;
    z-index: 200;
    background: var(--sb-bg);
    border: 1px solid var(--sb-border);
    border-radius: 8px;
    padding: 6px 10px;
    font-size: 1.1em;
    cursor: pointer;
    color: var(--sb-text);
    line-height: 1;
    align-items: center;
}

/* ── Mobile overlay ── */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.45);
    z-index: 99;
}
.sidebar-overlay.visible { display: block; }

/* ── Mobile breakpoint ── */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: var(--sidebar-w) !important;
        transition: transform 0.22s ease;
        z-index: 150;
    }
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    .sidebar-hamburger { display: flex; }
    .sidebar-collapse-btn { display: none; }

    body.has-sidebar main,
    body.has-sidebar footer {
        margin-left: 0 !important;
        width: 100% !important;
    }
    body.has-sidebar main:not(.chat-main) {
        padding-top: 3.25rem;
    }
}