/*
 * anccer-theme — layout.css
 * App-shell layout: header, page grid, sidebars, footer, mobile nav.
 * Mobile-first — base rules target the smallest viewport; min-width
 * queries layer on enhancements for larger breakpoints.
 *
 * Only structural shells live here. Component-level styles (nav items,
 * sidebar widgets, activity feed) belong in components.css.
 *
 * Breakpoints used (from tokens.css reference):
 *   md  ≥ 768px    tablet portrait  — 2-col layout, sidebars appear
 *   lg  ≥ 1025px   laptop           — header nav wider
 *   xl  ≥ 1200px   desktop          — 3-col layout, max-width container
 *   2xl ≥ 1441px   wide desktop     — wider columns
 */


/* ═══════════════════════════════════════════════════════
   HEADER
   ═══════════════════════════════════════════════════════ */

#site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    height: var(--nav-height);
    transition: box-shadow var(--transition-base);
}

#site-header.is-scrolled {
    box-shadow: var(--shadow-md);
    border-bottom-color: transparent;
}

.header-inner {
    max-width: var(--container-max-header);
    margin-inline: auto;
    padding-inline: max(var(--space-4), env(safe-area-inset-left));
    height: 100%;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: var(--space-2);
}

.site-logo { justify-self: center; }

.site-logo img {
    height: 40px;
    width: auto;
}

/* Header nav groups */
.header-nav-left {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.header-nav-right {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    justify-self: end;
}

/* Nav icon tap targets */
.nav-icon-item,
.hamburger-btn,
.header-avatar {
    min-height: 44px;
}

/* Icon nav items hidden on mobile; hamburger takes over */
.header-nav-left .nav-icon-item { display: none; }

/* Hamburger visible on mobile */
.hamburger-btn { display: flex; }

/* Nav text items hidden below lg */
.nav-text-item { display: none; }

/* Logo centering: hide placeholder when logged-out left nav is empty */
.header-nav-left:empty,
.header-nav-left:not(:has(> *:not([hidden]))) { visibility: hidden; }

/* md+ — show icon nav, hide hamburger */
@media (min-width: 768px) {
    .header-inner {
        padding-inline: max(var(--space-8), env(safe-area-inset-left));
        gap: var(--space-4);
    }

    .header-nav-left .nav-icon-item { display: flex; }
    .hamburger-btn                  { display: none; }
}

/* lg+ — restore text nav items */
@media (min-width: 1025px) {
    .nav-text-item { display: inline-flex; }
}

/* 2xl */
@media (min-width: 1441px) {
    .header-inner { max-width: var(--container-max-wide); }
}


/* ═══════════════════════════════════════════════════════
   HAMBURGER BUTTON
   ═══════════════════════════════════════════════════════ */

.hamburger-btn {
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    border-radius: var(--radius);
    padding: 0;
    color: var(--color-text-muted);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.hamburger-btn:hover {
    background: var(--color-bg);
    color: var(--color-primary);
}

.hamburger-bar {
    display: block;
    width: 20px;
    height: 2px;
    background: currentColor;
    border-radius: 2px;
    transition: transform 0.22s cubic-bezier(0.215, 0.61, 0.355, 1), opacity 0.22s;
}

.hamburger-btn[aria-expanded="true"] .hamburger-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.hamburger-btn[aria-expanded="true"] .hamburger-bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.hamburger-btn[aria-expanded="true"] .hamburger-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}


/* ═══════════════════════════════════════════════════════
   MOBILE NAV PANEL + OVERLAY
   ═══════════════════════════════════════════════════════ */

.mobile-nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: var(--z-overlay);
}

.mobile-nav-overlay.is-open { display: block; }

.mobile-nav-panel {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    z-index: var(--z-drawer);
    overflow-y: auto;
    max-height: calc(100dvh - var(--nav-height));
    padding: var(--space-1-5, 0.375rem) 0 env(safe-area-inset-bottom);
    box-shadow: var(--shadow-lg);
    animation: mobileNavIn 0.2s ease;
}

@keyframes mobileNavIn {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
}

.mobile-nav-user {
    display: flex;
    align-items: center;
    gap: var(--space-3-5, 0.875rem);
    padding: var(--space-4) var(--space-5);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.mobile-nav-user-avatar {
    flex-shrink: 0;
    display: block;
    border-radius: var(--radius-full);
    line-height: 0;
}

.mobile-nav-user-avatar img {
    width: 44px !important;
    height: 44px !important;
    border-radius: var(--radius-full);
    border: 2px solid var(--color-border);
    display: block;
}

.mobile-nav-user-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.mobile-nav-user-name {
    font-size: 0.9375rem;
    font-weight: var(--font-bold);
    color: var(--color-text);
    line-height: var(--leading-tight);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mobile-nav-user-handle {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    line-height: var(--leading-snug);
}

.mobile-nav-settings-btn {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    color: var(--color-text-muted);
    text-decoration: none;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.mobile-nav-settings-btn:hover {
    background: var(--color-border);
    color: var(--color-primary);
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-3-5, 0.875rem);
    padding: var(--space-3-5, 0.875rem) var(--space-5);
    font-size: var(--text-base);
    color: var(--color-text);
    text-decoration: none;
    transition: background var(--transition-fast);
    min-height: 48px;
}

.mobile-nav-link:hover       { background: var(--color-bg); }
.mobile-nav-link.is-active,
.mobile-nav-link.active      { color: var(--color-primary); background: var(--color-active-bg); }
.mobile-nav-link svg         { flex-shrink: 0; color: var(--color-text-muted); }
.mobile-nav-link.is-active svg,
.mobile-nav-link.active svg  { color: var(--color-primary); }

.mobile-nav-link--danger         { color: var(--color-danger); }
.mobile-nav-link--danger svg     { color: var(--color-danger); }
.mobile-nav-link--danger:hover   { background: var(--color-danger-bg); }

.mobile-nav-divider {
    height: 1px;
    background: var(--color-border);
    margin: var(--space-1-5, 0.375rem) 0;
}

.mobile-nav-badge {
    margin-left: auto;
    min-width: 20px;
    height: 20px;
    background: var(--color-accent);
    color: var(--color-text-inverse);
    font-size: 11px;
    font-weight: var(--font-bold);
    border-radius: 10px;
    padding: 0 var(--space-1-5, 0.375rem);
    line-height: 20px;
    text-align: center;
}


/* ═══════════════════════════════════════════════════════
   SIDEBAR COLLAPSE (tablet only — React island controls this)
   Class applied/removed on #page-wrapper by useSidebarCollapse hook.
   ═══════════════════════════════════════════════════════ */

@media (min-width: 768px) and (max-width: 1199px) {
    #page-wrapper.is-sidebar-collapsed {
        grid-template-columns: 52px 1fr;
    }

    /* Icon-only mode: hide label text smoothly */
    #page-wrapper.is-sidebar-collapsed .side-nav-label {
        opacity: 0;
        max-width: 0;
        overflow: hidden;
        white-space: nowrap;
        transition: opacity 0.22s ease, max-width 0.22s ease;
    }

    #page-wrapper.is-sidebar-collapsed .side-nav-item {
        justify-content: center;
        padding-inline: 0;
    }

    /* Transition for the label expanding back */
    .side-nav-label {
        transition: opacity 0.22s ease, max-width 0.22s ease;
        max-width: 200px;
    }
}

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


/* ═══════════════════════════════════════════════════════
   PAGE GRID (APP SHELL)
   Mobile-first: single column → 2-col → 3-col
   ═══════════════════════════════════════════════════════ */

#page-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    padding: 0;
    margin: 0;
    width: 100%;
}

/* md+ — 2-col: left sidebar + main content */
@media (min-width: 768px) {
    #page-wrapper {
        grid-template-columns: 180px 1fr;
        gap: var(--space-6);
        padding-inline: var(--space-4);
        margin-top: var(--space-6);
    }
}

/* xl — 3-col: center in max-width container */
@media (min-width: 1200px) {
    #page-wrapper {
        max-width: var(--container-max);
        margin-inline: auto;
        margin-top: var(--space-6);
        grid-template-columns: var(--sidebar-left-width) 1fr var(--sidebar-right-width);
        gap: var(--space-6);
        padding-inline: var(--space-6);
    }
}

/* 2xl — wider columns */
@media (min-width: 1441px) {
    #page-wrapper {
        max-width: var(--container-max-wide);
        grid-template-columns: 220px 1fr 260px;
    }
}


/* ═══════════════════════════════════════════════════════
   SIDEBARS
   ═══════════════════════════════════════════════════════ */

/* Hidden on mobile; appear at md+ */
.layout-sidebar-left,
.layout-sidebar-right {
    display: none;
}

@media (min-width: 768px) {
    .layout-sidebar-left {
        display: block;
        position: sticky;
        top: calc(var(--nav-height) + var(--space-4));
        align-self: start;
    }
}

@media (min-width: 1200px) {
    .layout-sidebar-right {
        display: block;
        position: sticky;
        top: calc(var(--nav-height) + var(--space-4));
        align-self: start;
    }
}


/* ═══════════════════════════════════════════════════════
   MAIN CONTENT AREA
   Mobile: flat (no card chrome); md+: surface card
   ═══════════════════════════════════════════════════════ */

#main-content {
    min-width: 0;
    grid-column: 1;
    width: 100%;
    box-sizing: border-box;
}

@media (min-width: 768px) {
    #main-content {
        grid-column: 2;
        background: var(--color-surface);
        border-radius: var(--radius);
        border: 1px solid var(--color-border);
        padding: var(--space-5);
        min-height: 60vh;
        overflow-wrap: break-word;
        word-break: break-word;
    }
}

/* Full-bleed variant (logged-out home, full-width pages) */
#main-content.home-page { grid-column: 1 / -1; }

/* Feed: strip card padding so feed items sit edge-to-edge */
#main-content.feed-main {
    padding: 0;
    border: none;
    background: transparent;
}

@media (min-width: 768px) {
    #main-content.feed-main {
        padding: 0;
        border: none;
        background: transparent;
    }
}

/* Messages: full-width, no padding */
body.page-messages #page-wrapper {
    padding: 0;
}


/* ═══════════════════════════════════════════════════════
   ACCESSIBILITY — touch targets & skip nav
   ═══════════════════════════════════════════════════════ */

.nav-icon-item,
.mobile-nav-link,
.side-nav-item,
.hud-item {
    min-height: 44px;
}

.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    z-index: var(--z-tooltip);
    padding: var(--space-3) var(--space-5);
    background: var(--color-primary);
    color: var(--color-text-inverse);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    text-decoration: none;
    border-radius: 0 0 var(--radius) 0;
    transition: top var(--transition-fast);
}

.skip-link:focus { top: 0; }


/* ═══════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════ */

#site-footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--space-6) 0;
    margin-top: var(--space-12);
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--text-xs);
}

.footer-inner {
    max-width: var(--container-max-header);
    margin-inline: auto;
    padding-inline: max(var(--space-6), env(safe-area-inset-left));
}

.footer-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.footer-copy {
    margin: 0;
    max-width: 600px;
    line-height: var(--leading-loose);
    word-spacing: 0.1em;
}

.footer-copy a {
    color: var(--color-text-muted);
    text-decoration: none;
    white-space: nowrap;
    display: inline-block;
}

.footer-copy a:hover { color: var(--color-primary); }

.footer-social {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.footer-social a {
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
}

.footer-social a:hover { color: var(--color-primary); }

/* Mobile footer: stack items */
@media (max-width: 767px) {
    .footer-bar {
        flex-direction: column;
        text-align: center;
        gap: var(--space-3-5, 0.875rem);
    }
    .footer-social  { justify-content: center; }
    .footer-copy    { font-size: var(--text-xs); line-height: var(--leading-loose); }
}

@media (min-width: 1441px) {
    .footer-inner { max-width: var(--container-max-wide); }
}


/* ═══════════════════════════════════════════════════════
   DARK MODE — layout-specific overrides
   Token overrides are in tokens.css.
   ═══════════════════════════════════════════════════════ */

@media (prefers-color-scheme: dark) {
    .nav-icon-item.is-active,
    .nav-icon-item.active          { background: var(--color-active-bg); }
    .mobile-nav-link.is-active,
    .mobile-nav-link.active        { background: var(--color-active-bg); }
    .header-user-dropdown          { box-shadow: var(--shadow-xl); }
    .mobile-nav-link--danger:hover { background: #3b1212; }
}