/*
 * Header - Sticky navigation, mobile menu
 * Layout: dark top bar, white nav bar, pill-shaped CTA
 */

/* ========================================
   HEADER WRAPPER
   ======================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-distance);
}

/* ========================================
   LOGO
   ======================================== */
.site-header__logo {
    flex-shrink: 0;
}

.site-header__logo a {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 24px;
    font-weight: var(--font-weight-extra-bold);
    color: var(--color-text);
    letter-spacing: -0.02em;
    text-decoration: none;
}

.site-header__logo-img {
    height: 48px;
    width: auto;
}

@media (max-width: 999px) {
    .site-header__logo-img {
        height: 32px;
    }
}

/* ========================================
   NAVIGATION
   ======================================== */
.site-nav {
    display: flex;
    align-items: center;
    gap: 0;
}

.site-nav__list {
    display: flex;
    align-items: center;
    gap: 0;
    background: var(--color-bg-secondary);
    border-radius: var(--btn-radius);
    padding: 4px;
}

.site-nav__item {
    position: relative;
}

.site-nav__link {
    display: flex;
    align-items: center;
    height: 44px;
    padding: 0 20px;
    font-size: var(--font-size-menu);
    font-weight: var(--font-weight-menu);
    letter-spacing: var(--letter-spacing-menu);
    color: var(--color-text);
    text-decoration: none;
    border-radius: var(--btn-radius);
    transition: var(--transition-default);
    white-space: nowrap;
}

.site-nav__link:hover,
.site-nav__link--active {
    background: var(--color-bg);
    color: var(--color-text);
}

/* Dot separator */
.site-nav__dot {
    width: 4px;
    height: 4px;
    background: var(--color-muted);
    border-radius: 50%;
    margin: 0 4px;
}

/* ========================================
   HEADER ACTIONS (right side)
   ======================================== */
.site-header__actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

.site-header__cta {
    display: inline-flex;
}

.site-header__search-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    color: var(--color-text);
    transition: var(--transition-default);
}

.site-header__search-btn:hover {
    color: var(--color-primary-dark);
}

.site-header__search-btn svg {
    width: 20px;
    height: 20px;
}

/* ========================================
   MOBILE MENU TOGGLE
   ======================================== */
.mobile-menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    cursor: pointer;
}

.mobile-menu-toggle__bar {
    position: relative;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-default);
}

.mobile-menu-toggle__bar::before,
.mobile-menu-toggle__bar::after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-default);
}

.mobile-menu-toggle__bar::before {
    top: -7px;
}

.mobile-menu-toggle__bar::after {
    top: 7px;
}

/* Active state */
.mobile-menu-toggle--active .mobile-menu-toggle__bar {
    background: transparent;
}

.mobile-menu-toggle--active .mobile-menu-toggle__bar::before {
    top: 0;
    transform: rotate(45deg);
}

.mobile-menu-toggle--active .mobile-menu-toggle__bar::after {
    top: 0;
    transform: rotate(-45deg);
}

/* ========================================
   MOBILE NAV PANEL
   ======================================== */
.mobile-nav {
    display: none;
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    z-index: calc(var(--z-header) - 1);
    padding: var(--spacing-md);
    overflow-y: auto;
}

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

.mobile-nav__list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.mobile-nav__link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 0;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border);
    text-decoration: none;
}

.mobile-nav__link .icon {
    font-size: 22px;
    color: var(--color-muted);
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 999px) {
    .site-nav {
        display: none;
    }

    .site-header__cta {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .site-header__inner {
        height: 60px;
    }

    .mobile-nav {
        top: 60px;
    }
}