/* ===========================================
   Layout — Page Container, Sidebar, Navigation
   The structural shell that wraps page content.
   =========================================== */

/* Page Container */
.page {
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1;
    background-color: var(--bg-primary);
    padding: 0 1.5rem;
}

@media (min-width: 641px) {
    .page {
        flex-direction: row;
    }
}

/* ===========================================
   Sidebar — Collapsible Navigation
   =========================================== */

.sidebar {
    background-color: var(--bg-recessed);
    box-shadow: var(--shadow-inset);
    border-right: 1px solid var(--border-subtle);
    transition: width 0.2s ease;
    overflow: hidden;
    height: 100vh;
    position: sticky;
    top: 0;
    width: 150px;
}

.sidebar.collapsed {
    width: 48px;
}

.sidebar-content {
    height: 100%;
    display: flex;
    flex-direction: column;
}

/* Sidebar Header */
.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 0.5rem;
    background-color: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--border-subtle);
}

.brand {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
}

.brand-short {
    font-size: 1.2rem;
    color: var(--accent);
    font-weight: 700;
}

.brand-full {
    font-size: 0.85rem;
    white-space: normal;
    text-align: center;
    line-height: 1.3;
    color: var(--accent);
}

/* Sidebar Footer */
.sidebar-footer {
    margin-top: auto;
    display: flex;
    flex-direction: column;
}

.logout-form {
    margin: 0;
}

.logout-btn {
    width: 100%;
    background: none;
    border: none;
    border-top: 1px solid var(--border-subtle);
    cursor: pointer;
    text-decoration: none;
}

.logout-btn:hover {
    background-color: rgba(220, 53, 69, 0.15);
    color: var(--accent);
    border-left-color: var(--accent);
}

.logout-btn:hover svg {
    color: var(--accent);
}

.toggle-btn {
    background-color: rgba(0, 0, 0, 0.15);
    border: none;
    border-top: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.toggle-btn:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
}

/* Navigation */
.sidebar-nav {
    padding: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    flex: 1;
}

.sidebar-nav a {
    text-decoration: none;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0.65rem 0.85rem;
    color: var(--text-secondary);
    border-radius: 2px;
    border-left: 2px solid transparent;
    white-space: nowrap;
    overflow: hidden;
}

.nav-item:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
    border-left-color: var(--text-secondary);
}

.nav-item.active {
    background-color: var(--accent-light);
    color: var(--text-primary);
    border-left-color: var(--accent);
}

.nav-item.active svg {
    color: var(--accent);
}

.nav-item svg {
    flex-shrink: 0;
}

.nav-item .nav-text {
    font-size: 0.75rem;
    font-weight: 500;
    padding-left: 0.35rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.nav-text {
    display: none;
}

.brand-full {
    display: none;
}

.sidebar.show-text .nav-text {
    display: inline;
}

.sidebar.show-text .brand-full {
    display: block;
}

.sidebar.show-text .brand-short {
    display: none;
}

/* Collapsed state — icon-only layout */
.sidebar.collapsed .sidebar-nav {
    padding: 0.5rem;
    align-items: center;
}

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: 0.5rem 0;
    gap: 0;
    border-left-color: transparent;
    width: 100%;
}

.sidebar.collapsed .nav-item:hover {
    border-left-color: transparent;
}