/* nav.css — Navigation bar & hamburger menu */

/* ========================================
   Navigation Bar
   ======================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: var(--z-nav);
    padding-top: 5px;
    background-color: transparent;
    transition: background-color var(--transition-base),
        box-shadow var(--transition-base);
}

/* Scrolled state — solid background */
.nav--scrolled {
    background-color: var(--color-bg-main);
    box-shadow: var(--shadow-card);
}

/* ========================================
   Nav Container
   ======================================== */
.nav__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

@media (min-width: 768px) {
    .nav__container {
        height: 80px;
    }
}

/* ========================================
   Logo
   ======================================== */
.nav__logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    transition: opacity var(--transition-base);
}

.nav__logo:hover {
    opacity: 0.85;
    color: inherit;
}

.nav__logo:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.nav__logo img {
    display: block;
    width: 120px;
    height: auto;
}

@media (min-width: 768px) {
    .nav__logo img {
        width: 140px;
    }
}

/* ========================================
   Desktop Navigation Links
   ======================================== */
.nav__links {
    display: none;
    align-items: center;
    gap: var(--space-md);
    margin: 0;
    padding: 0;
    list-style: none;
}

@media (min-width: 1024px) {
    .nav__links {
        display: flex;
        gap: var(--space-lg);
    }
}

.nav__link {
    position: relative;
    font-family: var(--font-family);
    font-weight: 400;
    font-size: 0.875rem;
    color: var(--color-primary);
    padding: var(--space-sm) var(--space-xs);
    transition: color var(--transition-base);
    white-space: nowrap;
}

@media (min-width: 1200px) {
    .nav__link {
        font-size: 1rem;
        padding: var(--space-sm);
    }
}

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

.nav__link:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Active state underline */
.nav__link--active {
    color: var(--color-primary);
}

.nav__link--active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--space-xs);
    right: var(--space-xs);
    height: 2px;
    background-color: var(--color-primary);
    border-radius: 1px;
}

@media (min-width: 1024px) {
    .nav__link--active::after {
        left: var(--space-sm);
        right: var(--space-sm);
    }
}

/* ========================================
   Nav Right (Language Toggle + CTA)
   ======================================== */
.nav__right {
    display: none;
    align-items: center;
    gap: var(--space-lg);
}

@media (min-width: 1024px) {
    .nav__right {
        display: flex;
    }
}

/* Nav CTA Button — same size as all other buttons */
.nav__cta-btn {
    white-space: nowrap;
}

/* ========================================
   Hamburger Button (Mobile)
   ======================================== */
.nav__hamburger {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-primary);
    padding: 0;
    -webkit-tap-highlight-color: transparent;
    transition: color var(--transition-base);
}

@media (min-width: 1024px) {
    .nav__hamburger {
        display: none;
    }
}

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

.nav__hamburger:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.nav__hamburger svg {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

/* ========================================
   Mobile Overlay
   ======================================== */
.nav__overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-bg-main);
    z-index: var(--z-hamburger-overlay);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
    opacity: 0;
    visibility: hidden;
    transition: opacity 300ms ease, visibility 300ms ease;
}

/* Open state */
.nav__overlay--open {
    opacity: 1;
    visibility: visible;
}

/* ========================================
   Overlay Close Button
   ======================================== */
.nav__close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-primary);
    padding: 0;
    -webkit-tap-highlight-color: transparent;
    transition: color var(--transition-base);
}

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

.nav__close:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.nav__close svg {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

/* ========================================
   Overlay Links
   ======================================== */
.nav__overlay-link {
    font-family: var(--font-family);
    font-weight: 500;
    font-size: 1.5rem;
    color: var(--color-accent);
    padding: var(--space-sm) var(--space-xl);
    transition: color var(--transition-base), transform var(--transition-base);
    min-height: 48px;
    display: flex;
    align-items: center;
}

.nav__overlay-link:hover {
    color: var(--color-primary);
    transform: translateX(4px);
}

.nav__overlay-link:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ========================================
   Mockup v2 Glass Nav (applies via nav element)
   ======================================== */
nav.nav,
nav:not([class]) {
    background: rgba(255,255,255,0.82);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-bg-alt);
}

/* Scrolled state for mockup v2 */
nav.nav.nav--scrolled {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

/* ========================================
   Reduced Motion
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    .nav {
        transition: none;
    }

    .nav__overlay {
        transition: none;
    }

    .nav__overlay-link {
        transition: none;
    }

    .nav__hamburger,
    .nav__close,
    .nav__link,
    .nav__logo {
        transition: none;
    }
}