/**
 * MIREKBYGG - Navigation Component
 * Elegant, minimal navigation with luxury transitions
 */

.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    height: var(--nav-height);
    transition: 
        height var(--transition-base) var(--ease-out),
        background-color var(--transition-base) var(--ease-out),
        backdrop-filter var(--transition-base) var(--ease-out);
}

.main-nav::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10, 10, 10, 0.8) 0%, transparent 100%);
    opacity: 0;
    transition: opacity var(--transition-base) var(--ease-out);
    pointer-events: none;
}

.main-nav.scrolled {
    height: var(--nav-height-scrolled);
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.main-nav.scrolled::before {
    opacity: 1;
}

/* Nav Container */
.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-2xl);
    height: 100%;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Logo */
.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    z-index: calc(var(--z-fixed) + 1);
    /* Ensure logo is always visible */
    opacity: 1;
    visibility: visible;
}

.logo-mark {
    width: 48px;
    height: 48px;
    min-width: 48px;
    min-height: 48px;
    flex-shrink: 0;
    transition: transform var(--transition-base) var(--ease-out),
                width var(--transition-base) var(--ease-out),
                height var(--transition-base) var(--ease-out);
}

.main-nav.scrolled .logo-mark {
    width: 40px;
    height: 40px;
    min-width: 40px;
    min-height: 40px;
}

.nav-logo:hover .logo-mark {
    transform: scale(1.05);
}

.mm-logo {
    width: 100%;
    height: 100%;
    display: block;
}

.logo-text {
    font-family: var(--font-body);
    font-size: var(--text-lg);
    font-weight: var(--font-light);
    letter-spacing: var(--tracking-wider);
    color: var(--color-white);
    transition: font-size var(--transition-base) var(--ease-out);
}

.main-nav.scrolled .logo-text {
    font-size: var(--text-base);
}

.logo-text .gold {
    font-weight: var(--font-medium);
}

/* Nav Toggle (Mobile) */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    gap: 6px;
    z-index: calc(var(--z-fixed) + 1);
    cursor: pointer;
}

.toggle-line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: 
        transform var(--transition-base) var(--ease-out),
        opacity var(--transition-base) var(--ease-out);
}

.nav-toggle.active .toggle-line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

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

.nav-toggle.active .toggle-line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Nav Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav-link {
    position: relative;
    display: flex;
    align-items: center;
    padding: var(--space-2) var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    letter-spacing: var(--tracking-wide);
    color: var(--color-silver);
    transition: color var(--transition-base) var(--ease-out);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--space-4);
    right: var(--space-4);
    height: 1px;
    background: var(--color-gold);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-base) var(--ease-out);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* CTA Link in Nav */
.nav-link.cta {
    margin-left: var(--space-4);
    padding: var(--space-3) var(--space-6);
    background: transparent;
    border: 1px solid var(--color-gold);
    color: var(--color-gold);
    transition: 
        background var(--transition-base) var(--ease-out),
        color var(--transition-base) var(--ease-out);
}

.nav-link.cta::after {
    display: none;
}

.nav-link.cta:hover {
    background: var(--color-gold);
    color: var(--color-black);
}

/* === MOBILE NAVIGATION === */
@media (max-width: 1024px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--space-6);
        background: var(--color-black);
        opacity: 0;
        visibility: hidden;
        transition: 
            opacity var(--transition-base) var(--ease-out),
            visibility var(--transition-base) var(--ease-out);
    }
    
    .nav-menu.open {
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu li {
        opacity: 0;
        transform: translateY(20px);
        transition: 
            opacity var(--transition-base) var(--ease-out),
            transform var(--transition-base) var(--ease-out);
    }
    
    .nav-menu.open li {
        opacity: 1;
        transform: translateY(0);
    }
    
    .nav-menu.open li:nth-child(1) { transition-delay: 0.1s; }
    .nav-menu.open li:nth-child(2) { transition-delay: 0.15s; }
    .nav-menu.open li:nth-child(3) { transition-delay: 0.2s; }
    .nav-menu.open li:nth-child(4) { transition-delay: 0.25s; }
    .nav-menu.open li:nth-child(5) { transition-delay: 0.3s; }
    .nav-menu.open li:nth-child(6) { transition-delay: 0.35s; }
    
    .nav-link {
        font-size: var(--text-2xl);
        font-weight: var(--font-light);
        padding: var(--space-3) var(--space-6);
    }
    
    .nav-link.cta {
        margin-left: 0;
        margin-top: var(--space-4);
        font-size: var(--text-base);
        padding: var(--space-4) var(--space-8);
    }
}

/* === BACK TO TOP BUTTON === */
.back-to-top {
    position: fixed;
    bottom: var(--space-8);
    right: var(--space-8);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-charcoal);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-full);
    color: var(--color-white);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: 
        opacity var(--transition-base) var(--ease-out),
        visibility var(--transition-base) var(--ease-out),
        transform var(--transition-base) var(--ease-out),
        background var(--transition-base) var(--ease-out),
        border-color var(--transition-base) var(--ease-out);
    z-index: var(--z-sticky);
    cursor: pointer;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-gold);
    border-color: var(--color-gold);
    color: var(--color-black);
}

.back-to-top svg {
    width: 20px;
    height: 20px;
}

@media (max-width: 768px) {
    .back-to-top {
        bottom: var(--space-4);
        right: var(--space-4);
        width: 44px;
        height: 44px;
    }
}