/* ========== CUSTOM STYLES ========== */

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Navbar scroll state */
#navbar {
    background: transparent;
    transition: background 0.4s ease, box-shadow 0.4s ease, padding 0.4s ease;
}

#navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: 0 1px 20px rgba(10, 22, 40, 0.08);
}

#navbar.scrolled .nav-link {
    color: #1a3a5c;
}

#navbar.scrolled .font-serif {
    color: #0a1628;
}

/* Menu tabs */
.menu-tab {
    background: transparent;
    color: #6b7280;
    border: none;
    cursor: pointer;
}

.menu-tab.active {
    background: white;
    color: #0a1628;
    box-shadow: 0 2px 8px rgba(10, 22, 40, 0.1);
}

.menu-tab:hover:not(.active) {
    background: rgba(255, 255, 255, 0.6);
    color: #0a1628;
}

/* Menu panels */
.menu-panel {
    animation: fadeSlideIn 0.4s ease forwards;
}

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile menu */
#mobile-menu {
    animation: slideDown 0.3s ease forwards;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile nav links */
.mobile-nav-link {
    display: block;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-weight: 500;
    color: #1a3a5c;
    border-radius: 0.75rem;
    transition: all 0.2s ease;
    text-decoration: none;
}

.mobile-nav-link:hover {
    background-color: #f0faf5;
    color: #289064;
}

/* Back to top button */
#back-to-top {
    transition: opacity 0.3s ease, transform 0.3s ease, background-color 0.3s ease;
}

#back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

/* Scroll reveal animations (progressive enhancement) */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.7s ease, transform 0.7s ease;
    }

    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }

    .reveal-delay-1 { transition-delay: 0.1s; }
    .reveal-delay-2 { transition-delay: 0.2s; }
    .reveal-delay-3 { transition-delay: 0.3s; }
    .reveal-delay-4 { transition-delay: 0.4s; }
}

/* Selection color */
::selection {
    background-color: #b8ebd4;
    color: #0a1628;
}