/* ========================================
   CO-VER NAVIGATION
   Header, Nav, Mobile Menu
   ======================================== */

/* ========================================
   HEADER
   ======================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background-color: var(--color-bg-white);
    transition: var(--transition-all);
}

.header-scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: var(--space-4) var(--container-padding);
    transition: padding var(--transition-base);
}

.header-scrolled .header-inner {
    padding-top: var(--space-3);
    padding-bottom: var(--space-3);
}

/* ========================================
   LOGO
   ======================================== */

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: var(--transition-transform);
}

.logo:hover {
    opacity: 0.9;
}

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

.header-scrolled .logo img {
    height: 38px;
}

/* ========================================
   MAIN NAVIGATION
   ======================================== */

.nav-main {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

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

.nav-link {
    position: relative;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    text-decoration: none;
    padding: var(--space-2) 0;
    transition: var(--transition-colors);
}

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

.nav-link:hover {
    color: var(--color-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link.active {
    color: var(--color-primary);
}

/* Nav CTA Button */
.nav-cta {
    margin-left: var(--space-4);
}

/* ========================================
   MOBILE MENU TOGGLE
   ======================================== */

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: calc(var(--z-fixed) + 10);
}

.nav-toggle-bar {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text-primary);
    border-radius: 2px;
    transition: var(--transition-base);
    transform-origin: center;
}

/* Toggle Active State */
.nav-toggle.active .nav-toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle.active .nav-toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ========================================
   MOBILE NAVIGATION
   ======================================== */

.nav-mobile {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-bg-white);
    z-index: var(--z-fixed);
    padding: var(--space-24) var(--space-6) var(--space-8);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    overflow-y: auto;
}

.nav-mobile.open {
    transform: translateX(0);
}

.nav-mobile-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.nav-mobile-link {
    display: block;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-colors);
}

.nav-mobile-link:hover,
.nav-mobile-link.active {
    color: var(--color-primary);
}

.nav-mobile-cta {
    margin-top: var(--space-8);
}

.nav-mobile-cta .btn {
    width: 100%;
    justify-content: center;
}

/* ========================================
   MOBILE STYLES
   ======================================== */

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links,
    .nav-cta {
        display: none;
    }

    .nav-mobile {
        display: block;
    }

    .logo img {
        height: 38px;
    }

    .header-inner {
        padding: var(--space-3) var(--container-padding);
    }
}

/* Prevent body scroll when mobile menu is open */
body.nav-open {
    overflow: hidden;
}