:root {
    --color-turquoise: #20B2AA; /* Light Sea Green / Dark Turquoise */
    --color-lightblue: #E0F7FA;
    --color-yellow: #FFC107;
    --color-navy: #1A237E;
    --color-white: #FFFFFF;
}

body {
    font-family: 'Inter', sans-serif;
    color: #333;
    background-color: var(--color-white);
    animation: fadeInPage 0.8s ease-out; /* Smooth page load animation */
}

@keyframes fadeInPage {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    color: var(--color-navy);
}

.bg-turquoise { background-color: var(--color-turquoise); }
.bg-lightblue { background-color: var(--color-lightblue); }
.bg-yellow { background-color: var(--color-yellow); }
.bg-navy { background-color: var(--color-navy); }

.text-turquoise { color: var(--color-turquoise); }
.text-navy { color: var(--color-navy); }

.btn-primary {
    background-color: var(--color-yellow);
    color: var(--color-navy);
    font-weight: bold;
    transition: all 0.3s;
}
.btn-primary:hover {
    background-color: #FFD54F;
    transform: translateY(-2px);
}

.tour-card {
    transition: transform 0.3s, box-shadow 0.3s;
    border-radius: 12px;
    overflow: hidden;
    background-color: var(--color-white);
    border: none;
}
.tour-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.hero-slider .slide-content {
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
}

.transparent-header {
    background: transparent;
    transition: background 0.3s;
}
.transparent-header.scrolled {
    background: var(--color-navy);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* Header Background Transitions */
.header-bg-overlay {
    background-color: transparent;
    transition: background-color 0.3s ease-in-out;
}
.header-bg-overlay.bg-navy\/95 {
    background-color: rgba(26, 35, 126, 0.95);
}

.transparent-header.scrolled .nav-link,
.transparent-header.scrolled .text-xl,
.transparent-header.scrolled .fa-bars {
    /* Ensure text remains visible/white when scrolled */
    color: var(--color-white);
}

/* Animated Underline for Desktop Menu */
.nav-link {
    position: relative;
    padding-bottom: 5px;
    display: inline-block;
    transition: transform 0.3s ease, color 0.3s ease;
}

.nav-link:hover {
    transform: translateY(-3px);
    text-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-yellow);
    transform: scaleX(0);
    transform-origin: bottom right;
    transition: transform 0.3s ease-in-out;
}

.nav-link:hover::before {
    transform: scaleX(1);
    transform-origin: bottom left;
}

.nav-link::after {
    display: none; /* Remove old effect */
}

/* Menu Item Load Animation */
.nav-menu-item {
    opacity: 0;
    animation: slideDownFade 0.5s ease-out forwards;
}

@keyframes slideDownFade {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Stagger delays for menu items */
.nav-menu-item:nth-child(1) { animation-delay: 0.1s; }
.nav-menu-item:nth-child(2) { animation-delay: 0.2s; }
.nav-menu-item:nth-child(3) { animation-delay: 0.3s; }
.nav-menu-item:nth-child(4) { animation-delay: 0.4s; }

/* Mobile Menu Staggered Animation */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.mobile-nav-item {
    opacity: 0; /* Hidden by default */
    transform: translateY(20px);
    transition: opacity 0.3s ease-out, transform 0.3s ease-out;
}
.mobile-nav-item.animate-in {
    opacity: 1;
    transform: translateY(0);
}
/* Using transition-delay via JS is cleaner or specific classes */
.delay-100 { transition-delay: 100ms; }
.delay-200 { transition-delay: 200ms; }
.delay-300 { transition-delay: 300ms; }
.delay-400 { transition-delay: 400ms; }