/* OtOpcUa Admin — view-specific layer over the technical-light theme (theme.css).
   Tokens live in theme.css; this sheet only carries layout + the side rail. */

/* ── App shell: side rail + page ─────────────────────────────────────────── */
/* The outer flex direction is supplied by Bootstrap utilities on the wrapper
   (`d-flex flex-column flex-lg-row`) so the mobile hamburger row stacks above
   the rail on <lg viewports and the rail sits beside the page on lg+. */
.app-shell {
    align-items: stretch;
    min-height: calc(100vh - 3.3rem);
}

.app-shell .page {
    flex: 1;
    min-width: 0;
}

/* ── Side rail ───────────────────────────────────────────────────────────── */
.side-rail {
    width: 220px;
    flex: 0 0 220px;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    padding: 1rem 0.7rem;
    background: var(--card);
    border-right: 1px solid var(--rule-strong);
}

/* On lg+ keep the side rail pinned so it stays visible when content scrolls. */
@media (min-width: 992px) {
    #sidebar-collapse {
        position: sticky;
        top: 0;
        height: 100vh;
        align-self: flex-start;
        z-index: 1020;
    }
}

/* When the side rail is collapsed under <lg viewports the Bootstrap collapse
   container removes the fixed width; restore full width on mobile. */
@media (max-width: 991.98px) {
    .side-rail {
        width: 100%;
        min-width: 100%;
        max-width: 100%;
        height: auto;
    }
}

/* Brand block pinned at the top of the side rail. Mirrors ScadaLink's
   .sidebar .brand styling — used now that the top app-bar was dropped. */
.side-rail .brand {
    color: var(--ink);
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    padding: 1rem;
    border-bottom: 1px solid var(--rule);
    margin-bottom: 0.4rem;
}
.side-rail .brand .mark { color: var(--accent); }

.rail-eyebrow {
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--ink-faint);
    padding: 0.3rem 0.6rem;
}

/* Collapsible variant — rendered by NavSection.razor. Looks like .rail-eyebrow
   plus a leading chevron; clicking flips chevron + expanded state. */
.rail-eyebrow-toggle {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    width: 100%;
    background: transparent;
    border: 0;
    text-align: left;
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--ink-faint);
    padding: 0.45rem 0.6rem 0.3rem;
    cursor: pointer;
}
.rail-eyebrow-toggle:hover { color: var(--ink); }
.rail-eyebrow-chevron {
    display: inline-block;
    width: 0.7rem;
    font-size: 0.55rem;
    color: var(--ink-faint);
}
.rail-section-body {
    display: flex;
    flex-direction: column;
}

.rail-link {
    display: block;
    padding: 0.4rem 0.6rem;
    border-radius: 4px;
    border-left: 2px solid transparent;
    font-size: 0.86rem;
    color: var(--ink-soft);
}
.rail-link:hover {
    background: #f3f6fd;
    color: var(--ink);
    text-decoration: none;
}
.rail-link.active {
    background: #eef2fc;
    border-left-color: var(--accent);
    color: var(--accent-deep);
    font-weight: 600;
}

/* ── Session block, pinned to the rail foot ──────────────────────────────── */
.rail-foot {
    margin-top: auto;
    padding-top: 0.6rem;
    border-top: 1px solid var(--rule);
}
.rail-user {
    display: block;
    padding: 0 0.6rem;
    font-weight: 600;
    font-size: 0.88rem;
}
.rail-roles {
    padding: 0.1rem 0.6rem 0.5rem;
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--ink-faint);
}
.rail-btn {
    display: inline-block;
    margin: 0 0.6rem;
    padding: 0.3rem 0.7rem;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--ink-soft);
    background: var(--card);
    border: 1px solid var(--rule-strong);
    border-radius: 4px;
    cursor: pointer;
}
.rail-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    text-decoration: none;
}

/* ── Login card centring ─────────────────────────────────────────────────── */
.login-wrap {
    max-width: 380px;
    margin: 3.5rem auto 0;
}