/* ── Custom Styles ── */

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

/* Selection color */
::selection {
    background-color: #98D4C8;
    color: #0A2540;
}

/* ── Scroll Reveal ── */
.scroll-reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

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

@media (prefers-reduced-motion: no-preference) {
    .scroll-reveal {
        opacity: 0;
        transform: translateY(24px);
    }
    .scroll-reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Navbar Transition ── */
#site-header.scrolled {
    background-color: rgba(250, 250, 248, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(10, 37, 64, 0.06);
}

#site-header.scrolled #nav-brand {
    color: #0A2540;
}

#site-header.scrolled #nav-subtitle {
    color: #5FB3A3;
}

/* ── Nav Links Underline Animation ── */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1.5px;
    background-color: #98D4C8;
    transition: width 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.nav-link:hover::after {
    width: 100%;
}

/* ── Mobile Menu Animation ── */
#mobile-menu {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

#mobile-menu.active {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-link {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.3s ease, transform 0.3s ease, color 0.3s ease;
}

#mobile-menu.active .mobile-nav-link {
    opacity: 1;
    transform: translateY(0);
}

#mobile-menu.active .mobile-nav-link:nth-child(1) { transition-delay: 0.05s; }
#mobile-menu.active .mobile-nav-link:nth-child(2) { transition-delay: 0.1s; }
#mobile-menu.active .mobile-nav-link:nth-child(3) { transition-delay: 0.15s; }
#mobile-menu.active .mobile-nav-link:nth-child(4) { transition-delay: 0.2s; }
#mobile-menu.active .mobile-nav-link:nth-child(5) { transition-delay: 0.25s; }
#mobile-menu.active .mobile-nav-link:nth-child(6) { transition-delay: 0.3s; }

/* ── Input Focus States ── */
input:focus,
select:focus,
textarea:focus {
    outline: none;
}

/* ── Button Press Effect ── */
button:active,
a:active {
    transform: scale(0.98);
}

/* ── Form Error States ── */
input:invalid:not(:placeholder-shown),
textarea:invalid:not(:placeholder-shown) {
    border-color: #EF4444;
}

/* ── Print Styles ── */
@media print {
    #site-header,
    #mobile-menu,
    .scroll-reveal {
        display: block !important;
        opacity: 1 !important;
        transform: none !important;
    }
    button,
    a:not([href]) {
        display: none;
    }
}