/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: transparent;
    transition: background var(--transition-base),
                box-shadow var(--transition-base),
                padding var(--transition-base);
    padding: var(--space-5) 0;
}

.site-header.header--scrolled {
    background: rgba(17, 17, 17, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 1px 0 var(--color-border);
    padding: var(--space-3) 0;
}

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

/* Logo */
.header__logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: var(--weight-bold);
    color: var(--color-text-primary);
    z-index: 1001;
}

.header__logo-icon {
    width: 40px;
    height: 40px;
    background-color: var(--color-accent);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--weight-bold);
    color: var(--color-black);
    font-size: var(--text-sm);
}

.header__logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.header__logo-text span:first-child {
    font-size: var(--text-base);
    font-weight: var(--weight-bold);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
}

.header__logo-text span:last-child {
    font-size: var(--text-xs);
    font-weight: var(--weight-regular);
    color: var(--color-text-tertiary);
    letter-spacing: var(--tracking-wider);
    text-transform: uppercase;
}

/* Desktop Nav */
.header__nav {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.nav__link {
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    color: var(--color-text-secondary);
    position: relative;
    padding-bottom: var(--space-1);
    transition: color var(--transition-fast);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition-base), left var(--transition-base);
}

.nav__link:hover,
.nav__link--active {
    color: var(--color-text-primary);
}

.nav__link:hover::after,
.nav__link--active::after {
    width: 100%;
    left: 0;
}

/* Mobile Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 6px;
    width: 44px;
    height: 44px;
    z-index: 1001;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.nav-toggle__line {
    width: 24px;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: all var(--transition-base);
    transform-origin: center;
}

.nav-toggle.active .nav-toggle__line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active .nav-toggle__line:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active .nav-toggle__line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu Overlay */
.mobile-menu {
    position: fixed;
    inset: 0;
    background-color: var(--color-bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    transform: translateY(-100%);
    transition: transform var(--transition-slow);
    opacity: 0;
    pointer-events: none;
}

.mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
}

.mobile-menu__list {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
}

.mobile-menu__link {
    font-family: var(--font-heading);
    font-size: var(--text-3xl);
    font-weight: var(--weight-bold);
    color: var(--color-text-primary);
    opacity: 0;
    transform: translateX(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow), color var(--transition-fast);
}

.mobile-menu.active .mobile-menu__link {
    opacity: 1;
    transform: translateX(0);
}

.mobile-menu.active .mobile-menu__link:nth-child(1) { transition-delay: 100ms; }
.mobile-menu.active .mobile-menu__link:nth-child(2) { transition-delay: 150ms; }
.mobile-menu.active .mobile-menu__link:nth-child(3) { transition-delay: 200ms; }
.mobile-menu.active .mobile-menu__link:nth-child(4) { transition-delay: 250ms; }
.mobile-menu.active .mobile-menu__link:nth-child(5) { transition-delay: 300ms; }
.mobile-menu.active .mobile-menu__link:nth-child(6) { transition-delay: 350ms; }

.mobile-menu__link:hover {
    color: var(--color-accent);
}

.mobile-menu__cta {
    margin-top: var(--space-6);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.mobile-menu.active .mobile-menu__cta {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 400ms;
}

/* Responsive */
@media (max-width: 1023px) {
    .nav-toggle {
        display: flex;
    }
    .header__nav {
        display: none;
    }
}