/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   AURIRA — Header & Navigation
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-header);
    padding: 1.25rem 0;
    transition: all var(--transition-base);
    background: transparent;
}

.site-header.scrolled {
    background: rgba(15, 15, 15, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 0.75rem 0;
    border-bottom: var(--border-thin);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: 0 var(--gutter);
}

/* ─── Logo ─── */
.header__logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    z-index: calc(var(--z-header) + 2);
}

.header__logo img {
    height: 45px;
    width: auto;
    transition: height var(--transition-base);
}

.site-header.scrolled .header__logo img {
    height: 36px;
}

.header__logo-text {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-ivory);
    letter-spacing: 0.05em;
    transition: font-size var(--transition-base);
}

.site-header.scrolled .header__logo-text {
    font-size: 1.5rem;
}

/* ─── Navigation ─── */
.header__nav {
    display: flex;
    align-items: center;
}

.header__menu {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.header__menu a {
    font-family: var(--font-body);
    font-size: var(--fs-small);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: var(--ls-wider);
    color: var(--color-ivory-soft);
    position: relative;
    padding: 0.5rem 0;
    transition: color var(--transition-fast);
}

.header__menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-gold);
    transition: width var(--transition-base);
}

.header__menu a:hover,
.header__menu a.active,
.header__menu .current-menu-item a {
    color: var(--color-gold);
}

.header__menu a:hover::after,
.header__menu a.active::after,
.header__menu .current-menu-item a::after {
    width: 100%;
}

/* ─── Header CTA ─── */
.header__cta {
    margin-left: 2rem;
}

.header__cta .btn {
    padding: 0.6rem 1.5rem;
    font-size: var(--fs-tiny);
}

/* ─── Hamburger ─── */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 30px;
    height: 30px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: calc(var(--z-header) + 2);
    padding: 0;
}

.hamburger__line {
    width: 100%;
    height: 2px;
    background: var(--color-ivory);
    transition: all var(--transition-base);
    transform-origin: center;
}

.hamburger.active .hamburger__line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active .hamburger__line:nth-child(2) {
    opacity: 0;
}

.hamburger.active .hamburger__line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ─── Mobile Menu Overlay ─── */
.mobile-menu {
    position: fixed;
    inset: 0;
    background: rgba(15, 15, 15, 0.98);
    backdrop-filter: blur(30px);
    z-index: calc(var(--z-header) + 1);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
}

.mobile-menu.active {
    opacity: 1;
    pointer-events: all;
}

.mobile-menu__list {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.mobile-menu__list a {
    font-family: var(--font-heading);
    font-size: var(--fs-h2);
    color: var(--color-ivory);
    display: block;
    transition: all var(--transition-base);
    opacity: 0;
    transform: translateY(20px);
}

.mobile-menu.active .mobile-menu__list a {
    opacity: 1;
    transform: translateY(0);
}

.mobile-menu.active .mobile-menu__list li:nth-child(1) a { transition-delay: 0.1s; }
.mobile-menu.active .mobile-menu__list li:nth-child(2) a { transition-delay: 0.15s; }
.mobile-menu.active .mobile-menu__list li:nth-child(3) a { transition-delay: 0.2s; }
.mobile-menu.active .mobile-menu__list li:nth-child(4) a { transition-delay: 0.25s; }
.mobile-menu.active .mobile-menu__list li:nth-child(5) a { transition-delay: 0.3s; }

.mobile-menu__list a:hover {
    color: var(--color-gold);
}