/* Navigation Overlay */
.nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--bg-overlay);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, visibility 0.5s step-end;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.nav-overlay.active {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.5s ease, visibility 0s step-start;
}

/* Close Button */
.nav-close {
    position: absolute;
    top: 2rem;
    right: 2rem;
    background: transparent;
    border: none;
    color: var(--text-light);
    font-size: 2rem;
    cursor: pointer;
    transition: transform 0.3s ease;
    z-index: 1001;
}

.nav-close:hover {
    transform: rotate(90deg);
    color: var(--accent-gold);
}

/* Content Layout */
.nav-content {
    display: flex;
    width: 90%;
    max-width: var(--container-width);
    height: 80%;
    color: var(--text-light);
}

/* Left Column: Navigation */
.nav-links-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    padding-right: 4rem;
}

.nav-menu {
    list-style: none;
}

.nav-item {
    margin-bottom: 2rem;
    overflow: hidden;
    /* For text reveal animation if needed */
}

.nav-link {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    color: var(--text-light);
    text-decoration: none;
    display: inline-block;
    transition: color 0.3s ease, transform 0.3s ease;
    transform: translateY(20px);
    opacity: 0;
    /* Initial state for animation */
}

.nav-overlay.active .nav-link {
    transform: translateY(0);
    opacity: 1;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.6s ease;
}

/* Staggered Delays */
.nav-overlay.active .nav-item:nth-child(1) .nav-link {
    transition-delay: 0.1s;
}

.nav-overlay.active .nav-item:nth-child(2) .nav-link {
    transition-delay: 0.2s;
}

.nav-overlay.active .nav-item:nth-child(3) .nav-link {
    transition-delay: 0.3s;
}

.nav-overlay.active .nav-item:nth-child(4) .nav-link {
    transition-delay: 0.4s;
}

.nav-link:hover {
    color: var(--accent-gold);
    transform: translateX(10px) !important;
}

/* Right Column: Preview */
.nav-preview-col {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-left: 4rem;
    opacity: 0;
    transition: opacity 0.5s ease 0.5s;
}

.nav-overlay.active .nav-preview-col {
    opacity: 1;
}

.preview-card {
    text-align: center;
}

.preview-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--accent-gold);
}

.preview-text {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 400px;
    margin: 0 auto;
}

/* RTL Support */
[dir="rtl"] .nav-links-col {
    border-right: none;
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    padding-right: 0;
    padding-left: 4rem;
}

[dir="rtl"] .nav-preview-col {
    padding-left: 0;
    padding-right: 4rem;
}

[dir="rtl"] .nav-link:hover {
    transform: translateX(-10px) !important;
}

[dir="rtl"] .nav-close {
    right: auto;
    left: 2rem;
}