/**
 * Site Header — assets/css/header.css
 *
 * Light-context header: white background, dark text, red for accent/active only.
 * Extends the --eln-* token system from base.css with header-specific tokens
 * (--eln-hdr-*). No raw rgba() values appear below this token block.
 *
 * Layout (single row):
 *   logo  |  primary nav (flex:1)  |  actions (search · sign-in · hamburger)
 *
 * Hamburger:
 *   Visible on ALL viewport widths — opens the mobile/overlay nav drawer.
 *   On desktop it sits at the far right after the sign-in link; on mobile the
 *   primary nav hides and the hamburger is the only navigation trigger.
 *
 * Auth states:
 *   Logged out  → "Entrar / Registrarse" text+icon → redirects to /registro
 *   Logged in   → user icon + display name; hover swaps name → "Cerrar sesión"
 *
 * Admin bar:
 *   body.admin-bar .site-header → top: 32px (46px on ≤782px).
 */

/* ── Header-context design tokens ──────────────────────────────────────────── */
/*
 * All rgba() values named here. Light context: bg=white, text=dark.
 */

:root {
    /* Height — consumed by admin-bar offset and sticky-aware JS */
    --eln-header-height: 64px;

    /* Text on white background */
    --eln-hdr-text:           var(--eln-color-text);         /* #1D1D1B */
    --eln-hdr-text-muted:     var(--eln-color-text-muted);   /* #737373 */
    --eln-hdr-text-full:      var(--eln-color-text);         /* #1D1D1B */

    /* Interactive backgrounds (light surface) */
    --eln-hdr-bg-hover:       var(--eln-color-bg-alt);       /* #FAFAFA */
    --eln-hdr-bg-active:      var(--eln-color-grey-200);     /* #E5E5E5 */

    /* Dividers / borders on white surface */
    --eln-hdr-border:         var(--eln-color-border);       /* #E5E5E5 */
    --eln-hdr-border-input:   var(--eln-color-grey-300);     /* #D4D4D4 */

    /* Search input (white surface) */
    --eln-hdr-input-bg:       var(--eln-color-bg-alt);       /* #FAFAFA */
    --eln-hdr-input-bg-focus: #ffffff;
    --eln-hdr-input-border-focus: var(--eln-color-accent);   /* red */

    /* Scroll-shadow */
    --eln-hdr-shadow:         rgba(0, 0, 0, .08);
}

/* ── Skip link (accessibility) ──────────────────────────────────────────────── */

.site-header__skip-link {
    position: absolute;
    left: var(--eln-space-md);
    top: var(--eln-space-md);
    z-index: 9999;
    padding: var(--eln-space-xs) var(--eln-space-md);
    background: var(--eln-color-accent);
    color: var(--eln-color-text-inverse);
    font-size: var(--eln-font-size-sm);
    font-weight: var(--eln-font-weight-bold);
    border-radius: var(--eln-radius-md);
    text-decoration: none;
    transform: translateY(calc(-100% - var(--eln-space-4)));
    transition: transform var(--eln-transition);
}

.site-header__skip-link:focus {
    transform: translateY(0);
}

/* ── Header shell ───────────────────────────────────────────────────────────── */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--eln-color-bg);                  /* #ffffff */
    color: var(--eln-hdr-text);
    /* Figma: 1px solid #1D1D1B — dark editorial border, not the light grey token */
    border-bottom: 1px solid var(--eln-color-black-900);
}

/* Figma shows a clean dark border with no shadow overlay — scroll class kept for
   JS compatibility but box-shadow is removed to avoid competing with the dark border. */
.site-header--scrolled {
    box-shadow: none;
}

/* Admin bar offset */
.admin-bar .site-header {
    top: 32px;
}

@media (max-width: 782px) {
    .admin-bar .site-header {
        top: 46px;
    }
}

/* ── Inner row ──────────────────────────────────────────────────────────────── */

.site-header__inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    height: var(--eln-header-height);
}

/* ── Logo ───────────────────────────────────────────────────────────────────── */

.site-header__logo {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    text-decoration: none;
}

.site-header__logo:hover {
    text-decoration: none;
    opacity: .85;
}

.site-header__logo img {
    height: 44px;   /* Figma: increased from 38px */
    width: auto;
    display: block;
}

.site-header__logo-text {
    font-family: var(--eln-font-ui);
    font-size: var(--eln-font-size-lg);
    font-weight: var(--eln-font-weight-bold);
    color: var(--eln-hdr-text-full);
    letter-spacing: -0.02em;
    white-space: nowrap;
}

/* ── Primary navigation (desktop) ──────────────────────────────────────────── */

.site-header__nav {
    display: flex;
    align-items: center;
    min-width: 0;
    justify-self: center;   /* centered in middle grid column */
}

.site-header__menu {
    display: flex;
    align-items: center;
    gap: var(--eln-space-1);
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-header__menu > li {
    position: relative;
    display: flex;
    align-items: center;
}

.site-header__menu > li > a {
    display: block;
    padding: var(--eln-space-2) var(--eln-space-3);
    font-family: var(--eln-font-ui);
    font-size: var(--eln-font-size-sm);
    font-weight: var(--eln-font-weight-bold);   /* Figma: bold, not medium */
    letter-spacing: 0.01em;
    color: var(--eln-hdr-text);
    border-radius: var(--eln-radius-md);
    white-space: nowrap;
    transition: color var(--eln-transition), background-color var(--eln-transition);
    text-decoration: none;
}

.site-header__menu > li > a:hover {
    color: var(--eln-hdr-text-full);
    background-color: var(--eln-hdr-bg-hover);
    text-decoration: none;
}

/* Active state — 2px red underline (editorial accent) */
.site-header__menu > li.current-menu-item > a,
.site-header__menu > li.current-menu-ancestor > a,
.site-header__menu > li.current-menu-parent > a {
    color: var(--eln-color-accent);
    font-weight: var(--eln-font-weight-bold);
}

/* ── Submenu toggle button ──────────────────────────────────────────────────── */

.site-header__submenu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: transparent;
    border: none;
    border-radius: var(--eln-radius-md);
    color: var(--eln-hdr-text-muted);
    cursor: pointer;
    padding: 0;
    margin-left: 1px;
    transition: background-color var(--eln-transition), color var(--eln-transition),
                transform var(--eln-transition);
    flex-shrink: 0;
}

.site-header__submenu-toggle:hover {
    background-color: var(--eln-hdr-bg-hover);
    color: var(--eln-hdr-text-full);
}

.site-header__submenu-toggle svg {
    width: 14px;
    height: 14px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    display: block;
    transition: transform var(--eln-transition);
}

.site-header__submenu-toggle[aria-expanded="true"] svg {
    transform: rotate(180deg);
}

/* ── Sub-menus ──────────────────────────────────────────────────────────────── */

.site-header__menu .sub-menu {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    min-width: 200px;
    background: var(--eln-color-bg);
    border: 1px solid var(--eln-color-border);
    border-radius: var(--eln-radius-md);
    box-shadow: 0 4px 20px var(--eln-hdr-shadow);
    padding: var(--eln-space-xs) 0;
    list-style: none;
    margin: 0;
    z-index: 10;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-4px);
    transition: opacity var(--eln-transition), transform var(--eln-transition);
}

.site-header__menu > li:hover > .sub-menu,
.site-header__menu > li > .sub-menu.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.site-header__menu .sub-menu a {
    display: block;
    padding: var(--eln-space-2) var(--eln-space-md);
    font-family: var(--eln-font-ui);
    font-size: var(--eln-font-size-sm);
    color: var(--eln-color-text);
    white-space: nowrap;
    transition: background-color var(--eln-transition), color var(--eln-transition);
    text-decoration: none;
}

.site-header__menu .sub-menu a:hover,
.site-header__menu .sub-menu a:focus {
    background-color: var(--eln-color-bg-alt);
    color: var(--eln-color-accent);
    text-decoration: none;
    outline: none;
}

/* ── Actions area ───────────────────────────────────────────────────────────── */

.site-header__actions {
    display: flex;
    align-items: center;
    gap: var(--eln-space-2);
    grid-column: 3;          /* always in third column even when nav is absent */
    justify-self: end;
}

/* Auth group */
.site-header__auth {
    display: flex;
    align-items: center;
    gap: var(--eln-space-2);
}

/* ── Auth text+icon link ────────────────────────────────────────────────────── */
/*
 * Both logged-in and logged-out states use a text+icon pattern (Verge style).
 *
 * Logged out:  [user icon] "Entrar / Registrarse"  → register URL
 * Logged in:   [user icon] [display name]   → logout URL
 *              On hover: display name → "Cerrar sesión"
 */

.site-header__auth-link {
    display: inline-flex;
    align-items: center;
    gap: var(--eln-space-2);
    padding: var(--eln-space-2) var(--eln-space-3);
    font-family: var(--eln-font-ui);
    font-size: var(--eln-font-size-xs);
    font-weight: var(--eln-font-weight-medium);
    color: var(--eln-hdr-text-muted);
    border-radius: var(--eln-radius-md);
    white-space: nowrap;
    text-decoration: none;
    transition: background-color var(--eln-transition), color var(--eln-transition);
    cursor: pointer;
    background: transparent;
    border: none;
}

.site-header__auth-link:hover {
    background-color: var(--eln-hdr-bg-hover);
    color: var(--eln-hdr-text-full);
    text-decoration: none;
}

.site-header__auth-link svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    display: block;
    flex-shrink: 0;
}

/* Auth label text (visible text beside the icon) */
.site-header__auth-label {
    line-height: 1;
}

/* Logged-in name / sign-out swap */
.site-header__auth-signout {
    display: none;
}

.site-header__auth-link--in:hover .site-header__auth-name {
    display: none;
}

.site-header__auth-link--in:hover .site-header__auth-signout {
    display: inline;
    color: var(--eln-color-accent);
}

/* ── Icon button base (search toggle) ──────────────────────────────────────── */

.site-header__search-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;                                /* Figma: 32px, not 36px */
    height: 32px;                               /* Figma: 32px, not 36px */
    background: var(--eln-hdr-bg-active);       /* Figma: #E5E5E5 fill */
    border: none;
    border-radius: var(--eln-radius-sm);        /* Figma: 4px — radius-sm, not radius-md */
    color: var(--eln-hdr-text-muted);
    cursor: pointer;
    padding: 0;
    text-decoration: none;
    transition: background-color var(--eln-transition), color var(--eln-transition);
    font-family: inherit;
    font-size: inherit;
    line-height: 1;
}

.site-header__search-toggle:hover {
    background-color: var(--eln-hdr-border-input);  /* #D4D4D4 — one step darker on hover */
    color: var(--eln-hdr-text-full);
    text-decoration: none;
}

.site-header__search-toggle svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    display: block;
    flex-shrink: 0;
}

/* ── Hamburger / menu toggle ────────────────────────────────────────────────── */
/*
 * Visible on ALL viewport widths — priority icon in the actions cluster.
 * On desktop: opens the overlay nav drawer alongside the visible primary nav.
 * On mobile: primary nav is hidden; hamburger is the only navigation trigger.
 */

.site-header__menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;                                /* Figma: 32px, not 36px */
    height: 32px;                               /* Figma: 32px, not 36px */
    background: var(--eln-hdr-bg-active);       /* Figma: #E5E5E5 fill */
    border: none;
    border-radius: var(--eln-radius-sm);        /* Figma: 4px — radius-sm, not radius-md */
    color: var(--eln-hdr-text-muted);
    cursor: pointer;
    padding: 0;
    transition: background-color var(--eln-transition), color var(--eln-transition);
    font-family: inherit;
    font-size: inherit;
    line-height: 1;
}

.site-header__menu-toggle:hover {
    background-color: var(--eln-hdr-border-input);  /* #D4D4D4 — one step darker on hover */
    color: var(--eln-hdr-text-full);
}

.site-header__menu-toggle svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    display: block;
    flex-shrink: 0;
}

/* Hamburger → close icon swap via body.menu-open */
.site-header .site-header__icon-close {
    display: none;
}

.menu-open .site-header .site-header__icon-hamburger {
    display: none;
}

.menu-open .site-header .site-header__icon-close {
    display: block;
}

/* ── Search panel ───────────────────────────────────────────────────────────── */
/*
 * Full-width panel below the header row.
 * [ decorative magnifier | input (flex:1) | close button ]
 * Submit is visually hidden — pressing Enter submits the form.
 */

.site-header__search-panel {
    background: var(--eln-color-bg);
    border-top: 1px solid var(--eln-hdr-border);
    padding: var(--eln-space-md) 0;
}

.site-header__search-panel[hidden] {
    display: none;
}

.site-header__search-form {
    display: flex;
    align-items: center;
    gap: var(--eln-space-sm);
    position: relative;
}

/* Decorative magnifier inside the input */
.site-header__search-icon {
    position: absolute;
    left: var(--eln-space-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--eln-hdr-text-muted);
    pointer-events: none;
    flex-shrink: 0;
}

.site-header__search-icon svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    display: block;
}

.site-header__search-input {
    flex: 1;
    height: 48px;
    padding: 0 var(--eln-space-md) 0 calc(var(--eln-space-md) + 26px);
    background: var(--eln-hdr-input-bg);
    border: 1px solid var(--eln-hdr-border-input);
    border-radius: var(--eln-radius-md);
    color: var(--eln-hdr-text-full);
    font-family: var(--eln-font-ui);
    font-size: var(--eln-font-size-base);
    transition: border-color var(--eln-transition), background-color var(--eln-transition);
    -webkit-appearance: none;
    appearance: none;
}

.site-header__search-input::placeholder {
    color: var(--eln-hdr-text-muted);
}

.site-header__search-input:focus {
    outline: none;
    border-color: var(--eln-hdr-input-border-focus);
    background-color: var(--eln-hdr-input-bg-focus);
}

.site-header__search-input::-webkit-search-cancel-button {
    -webkit-appearance: none;
    display: none;
}

/* Submit visually hidden — Enter still submits; screen readers find it */
.site-header__search-submit {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Single visible close button */
.site-header__search-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    border-radius: var(--eln-radius-md);
    color: var(--eln-hdr-text-muted);
    cursor: pointer;
    padding: 0;
    transition: background-color var(--eln-transition), color var(--eln-transition);
    font-family: inherit;
}

.site-header__search-close:hover {
    background-color: var(--eln-hdr-bg-hover);
    color: var(--eln-hdr-text-full);
}

.site-header__search-close svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    display: block;
}

/* ── Mobile breakpoint ──────────────────────────────────────────────────────── */

@media (max-width: 768px) {

    .site-header .site-header__nav {
        display: none;
    }

    /* Auth link moves to nav panel on mobile */
    .site-header__auth {
        display: none;
    }

    .site-header__inner {
        display: flex;
        gap: var(--eln-space-sm);
    }

    .site-header__actions {
        margin-left: auto;
        grid-column: unset;
        justify-self: unset;
    }
}

/* ── Body scroll lock when mobile menu is open ──────────────────────────────── */

body.menu-open {
    overflow: hidden;
}