/* ============================================================
   layout.css — Header, sidebar, overlay, main content, footer
   ============================================================ */

/* ── Wrapper ── */
.layout-wrapper {
    min-height: 100vh;
}

/* ── Header ── */
.layout-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 30;
    height: var(--header-height);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-4);
}

@media (min-width: 1024px) {
    .layout-header {
        padding: 0 var(--space-6);
    }
}

.layout-header__brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.layout-header__app-name {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.01em;
}

.layout-header__company-logo {
    max-height: 2rem;
    max-width: 10rem;
    width: auto;
    object-fit: contain;
    display: block;
}

.layout-header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.layout-header__user-email {
    display: none;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

@media (min-width: 640px) {
    .layout-header__user-email {
        display: inline;
    }
}

/* ── Sidebar toggle button ── */
.sidebar-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    border: none;
    background: transparent;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: background var(--transition), color var(--transition);
    flex-shrink: 0;
}

.sidebar-toggle:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.sidebar-toggle:focus-visible {
    outline: 2px solid var(--color-text-muted);
    outline-offset: 2px;
}

/* Icon swap via aria-expanded */
.sidebar-toggle #icon-close {
    display: none;
}

.sidebar-toggle[aria-expanded="true"] #icon-menu {
    display: none;
}

.sidebar-toggle[aria-expanded="true"] #icon-close {
    display: block;
}

/* Hide toggle on desktop */
@media (min-width: 1024px) {
    .sidebar-toggle {
        display: none;
    }
}

/* ── Mobile overlay ── */
.layout-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 20;
    background: rgba(0, 0, 0, 0.4);
}

.layout-overlay.is-open {
    display: block;
}

@media (min-width: 1024px) {
    .layout-overlay {
        display: none !important;
    }
}

/* ── Sidebar ── */
.layout-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 25;
    width: var(--sidebar-width);
    height: 100%;
    background: var(--color-nav-bg);
    color: var(--color-nav-text);
    display: flex;
    flex-direction: column;
    transform: translateX(-100%);
    transition: transform var(--transition-speed) ease-in-out;
    will-change: transform;
}

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

@media (min-width: 1024px) {
    .layout-sidebar {
        transform: translateX(0);
        top: var(--header-height);
        height: calc(100% - var(--header-height));
    }
}

/* Mobile brand row (shown only when sidebar covers the header) */
.layout-sidebar__brand {
    display: flex;
    align-items: center;
    height: var(--header-height);
    padding: 0 var(--space-5);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    flex-shrink: 0;
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--color-nav-active-text, #ffffff);
}

@media (min-width: 1024px) {
    .layout-sidebar__brand {
        display: none;
    }
}

/* Scrollable nav area */
.layout-sidebar__nav {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-4) var(--space-3);
}

/* Sidebar footer */
.layout-sidebar__footer {
    flex-shrink: 0;
    padding: var(--space-4);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.75rem;
    color: var(--color-text-subtle);
}

/* ── Nav list ── */
.nav-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.nav-item a {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-nav-text);
    transition: background var(--transition), color var(--transition);
}

.nav-item a:hover,
.nav-item a.is-active {
    background: var(--color-nav-active-bg);
    color: var(--color-nav-active-text);
}

/* ── Nav headings ──
   Role sections ("Owner", "Participant"). Feature groups nested inside a role section are rendered
   as collapsible .nav-group blocks below, not as headings. */
.nav-section-heading {
    margin: var(--space-4) 0 var(--space-2);
    padding: 0 var(--space-3);
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-nav-text);
    opacity: 0.5;
}

.nav-list > .nav-section-heading:first-child {
    margin-top: 0;
}

/* ── Collapsible nav groups ──
   A native <details>. The <summary> is styled to match a nav item so the sidebar reads as one list;
   the chevron is the only thing that marks it as expandable. Children live in a real nested <ul>,
   which is what lets the whole group be indented without sibling-combinator tricks. */
.nav-group__summary {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-nav-text);
    cursor: pointer;
    user-select: none;
    list-style: none;
    transition: background var(--transition), color var(--transition);
}

/* Hide the default disclosure triangle — the chevron replaces it. */
.nav-group__summary::-webkit-details-marker {
    display: none;
}

.nav-group__summary:hover {
    background: var(--color-nav-active-bg);
    color: var(--color-nav-active-text);
}

.nav-group__summary:focus-visible {
    outline: 2px solid var(--color-nav-active-text, #ffffff);
    outline-offset: -2px;
}

.nav-group__label {
    flex: 1;
    min-width: 0;
}

.nav-group__chevron {
    flex-shrink: 0;
    opacity: 0.6;
    transition: transform var(--transition);
}

.nav-group__details[open] > .nav-group__summary .nav-group__chevron {
    transform: rotate(90deg);
}

/* The group holding the current page keeps a quiet marker while it is open, so the user can see
   which section they are in without the summary competing with the active child link. */
.nav-group__details[data-nav-active] > .nav-group__summary {
    color: var(--color-nav-active-text);
}

.nav-group__list {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    margin: var(--space-1) 0 var(--space-2);
    padding-left: var(--space-3);
    border-left: 1px solid rgba(255, 255, 255, 0.12);
    margin-left: calc(var(--space-3) + 0.5rem);
}

.nav-group__list .nav-item a {
    padding-block: calc(var(--space-2) - 1px);
    font-size: 0.8125rem;
}

@media (prefers-reduced-motion: reduce) {
    .nav-group__chevron {
        transition: none;
    }
}

/* ── Main content ── */
.layout-main {
    min-height: 100vh;
    padding-top: var(--header-height);
}

@media (min-width: 1024px) {
    .layout-main {
        padding-left: var(--sidebar-width);
    }
}

.layout-main__inner {
    padding: var(--space-6) var(--space-4);
    max-width: 1280px;
}

@media (min-width: 640px) {
    .layout-main__inner {
        padding-inline: var(--space-6);
    }
}

@media (min-width: 1024px) {
    .layout-main__inner {
        padding-inline: var(--space-8);
    }
}

/* ── Footer ── */
.layout-footer {
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
}

.layout-footer__text {
    font-size: 0.75rem;
    color: var(--color-text-subtle);
    text-align: center;
}

/* ── Scroll lock when sidebar is open ── */
body.sidebar-open {
    overflow: hidden;
}