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

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

@media (min-width: 1024px) {
    .nav {
        position: fixed;
        top: 0;
        left: 0;
        background-color: transparent;
    }
}

/* 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-accent);
}

.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;
    }
}

/* Language Toggle */
.nav__lang {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.nav__lang-btn {
    font-family: var(--font-family);
    font-size: 0.8125rem;
    font-weight: var(--font-medium);
    color: var(--color-accent);
    padding: 2px 4px;
    transition: color var(--transition-base);
}

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

.nav__lang-btn--active {
    color: var(--color-primary);
    font-weight: var(--font-semibold);
}

.nav__lang-sep {
    color: var(--color-accent);
    font-size: 0.75rem;
    user-select: none;
}

/* Nav CTA Button */
.nav__cta-btn {
    white-space: nowrap;
}

/* ========================================
   Hamburger Button (Mobile)
   ======================================== */
.nav__hamburger {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-primary);
    padding: 0;
    -webkit-tap-highlight-color: transparent;
    position: relative;
    z-index: calc(var(--z-hamburger-overlay) + 2);
}

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

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

/* Hamburger icon — 3 lines that animate to X */
.nav__hamburger-line {
    display: block;
    width: 22px;
    height: 2px;
    background-color: currentColor;
    border-radius: 1px;
    transition: transform 300ms ease, opacity 200ms ease;
    position: absolute;
}

.nav__hamburger-line:nth-child(1) {
    transform: translateY(-7px);
}

.nav__hamburger-line:nth-child(2) {
    transform: translateY(0);
}

.nav__hamburger-line:nth-child(3) {
    transform: translateY(7px);
}

/* Open state — X shape */
.nav__hamburger--open .nav__hamburger-line:nth-child(1) {
    transform: rotate(45deg);
}

.nav__hamburger--open .nav__hamburger-line:nth-child(2) {
    opacity: 0;
}

.nav__hamburger--open .nav__hamburger-line:nth-child(3) {
    transform: rotate(-45deg);
}

/* ========================================
   Mobile Menu Backdrop
   ======================================== */
.nav__backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: var(--z-hamburger-overlay);
    opacity: 0;
    visibility: hidden;
    transition: opacity 300ms ease, visibility 300ms ease;
    -webkit-tap-highlight-color: transparent;
}

.nav__backdrop--visible {
    opacity: 1;
    visibility: visible;
}

/* ========================================
   Mobile Menu Panel
   ======================================== */
.nav__mobile {
    position: fixed;
    top: 0;
    right: 0;
    width: 300px;
    max-width: 85vw;
    height: 100%;
    background: var(--color-white, #fff);
    z-index: calc(var(--z-hamburger-overlay) + 1);
    display: flex;
    flex-direction: column;
    padding: 80px 0 32px;
    overflow-y: auto;
    transform: translateX(100%);
    visibility: hidden;
    transition: transform 300ms cubic-bezier(0.4, 0, 0.2, 1),
                visibility 300ms ease;
}

.nav__mobile--open {
    transform: translateX(0);
    visibility: visible;
}

/* ========================================
   Mobile Menu Links
   ======================================== */
.nav__mobile-link {
    font-family: var(--font-family);
    font-weight: 500;
    font-size: 1rem;
    color: var(--color-primary);
    padding: 14px 28px;
    display: block;
    text-decoration: none;
    transition: background-color 150ms ease;
    border-left: 3px solid transparent;
}

.nav__mobile-link:hover {
    background-color: rgba(17, 94, 89, 0.05);
}

.nav__mobile-link--active {
    color: var(--color-primary);
    font-weight: 600;
    border-left-color: var(--color-primary);
    background-color: rgba(17, 94, 89, 0.04);
}

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

/* ========================================
   Mobile Menu Language Toggle
   ======================================== */
.nav__mobile-lang {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 14px 28px;
    border-top: 1px solid var(--color-bg-alt);
    margin-top: var(--space-md);
}

.nav__mobile-lang .nav__lang-btn {
    font-size: 0.875rem;
    padding: 4px 8px;
}

/* ========================================
   Mobile Menu CTA
   ======================================== */
.nav__mobile-cta {
    margin-top: auto;
    padding: 24px 28px;
}

.nav__mobile-cta .btn {
    width: 100%;
    text-align: center;
    justify-content: center;
}

/* ========================================
   Glass Nav (Scrolled) — desktop only
   ======================================== */
@media (min-width: 1024px) {
    nav.nav.nav--scrolled {
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--color-bg-alt);
    }
}

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

    .nav__mobile,
    .nav__backdrop {
        transition: none;
    }

    .nav__hamburger-line {
        transition: none;
    }

    .nav__mobile-link,
    .nav__link,
    .nav__logo {
        transition: none;
    }
}