/* ==========================================================================
   header.css
   ========================================================================== */

/* --------------------------------------------------------------------------
   Scroll-aware visibility — controlled by menu.js
   Adds/removes .header--hidden when scrolling down/up
   -------------------------------------------------------------------------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    background-color: var(--color-background);
    border-bottom: 0.0625rem solid var(--color-border);
    transform: translateY(0);
    transition: transform 0.3s ease, background-color 0.2s ease;
}

.site-header.header--hidden {
    transform: translateY(-100%);
}

/* --------------------------------------------------------------------------
   Inner layout: logo | nav | icons
   -------------------------------------------------------------------------- */
.header-inner {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    padding: 0 var(--space-medium);
    height: var(--header-height);
    width: 100%;
    box-sizing: border-box;
}

/* --------------------------------------------------------------------------
   Logo
   -------------------------------------------------------------------------- */
.header-logo {
    text-decoration: none;
    color: var(--color-text);
    display: flex;
    align-items: center;
}

.header-logo__img {
    height: calc(var(--header-height) * 0.5);
    width: auto;
}

.header-logo__text {
    font-size: var(--font-size-large);
    font-weight: 700;
    letter-spacing: -0.02em;
    white-space: nowrap;
}

/* --------------------------------------------------------------------------
   Desktop nav
   -------------------------------------------------------------------------- */
.header-nav {
    display: flex;
    justify-content: center;
}

.header-nav__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: var(--space-large);
}

.header-nav__link {
    text-decoration: none;
    color: var(--color-text-muted);
    font-size: var(--font-size-medium);
    padding: var(--space-extra-small) 0;
    border-bottom: 0.125rem solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease;
    white-space: nowrap;
}

.header-nav__link:visited {
    color: var(--color-text-muted)
}

.header-nav__link:hover {
    color: var(--color-text);
}

.header-nav__link--active {
    color: var(--color-text);
    border-bottom-color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Icons (language + theme)
   -------------------------------------------------------------------------- */
.header-icons {
    display: flex;
    align-items: center;
    gap: var(--space-small);
}

.header-icons__btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-extra-small);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    border-radius: 0.25rem;
    transition: color 0.2s ease, background-color 0.2s ease;
}

.header-icons__btn:hover {
    color: var(--color-text);
    background-color: var(--color-background-hover);
}

.header-icons__svg {
    width: 2.3rem;
    height: 2rem;
    display: block;
}

/* --------------------------------------------------------------------------
   Hamburger (hidden on desktop)
   -------------------------------------------------------------------------- */
.header-hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-extra-small);
    color: var(--color-text);
    align-items: center;
    justify-content: center;
    border-radius: 0.25rem;
    transition: background-color 0.2s ease;
}

.header-hamburger:hover {
    background-color: var(--color-background-hover);
}

/* --------------------------------------------------------------------------
   Mobile menu (hidden by default)
   -------------------------------------------------------------------------- */
.header-mobile-menu {
    display: none;
    flex-direction: column;
    background-color: var(--color-background);
    border-top: 0.0625rem solid var(--color-border);
    padding: var(--space-medium);
    gap: var(--space-medium);
}

.header-mobile-menu.is-open {
    display: flex;
}

.header-mobile-menu__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-small);
}

.header-mobile-menu__link {
    text-decoration: none;
    color: var(--color-text-muted);
    font-size: var(--font-size-large);
    padding: var(--space-extra-small) 0;
    border-bottom: 0.0625rem solid var(--color-border);
    display: block;
    transition: color 0.2s ease;
}

.header-mobile-menu__link:hover,
.header-mobile-menu__link--active {
    color: var(--color-text);
}

.header-mobile-menu__icons {
    display: flex;
    gap: var(--space-small);
    align-items: center;
}