/* ============================================
   Institute for Applied Behavior Analysis
   Custom Styles — Plum & Amber Editorial Theme
   ============================================ */

/* ---- Base & Typography ---- */
html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
}

::selection {
    background-color: #D4A843;
    color: #1A0E17;
}

/* ---- Navigation ---- */
.nav-fixed {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: background-color 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}

.nav-scrolled {
    background-color: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 20px rgba(93, 46, 76, 0.08);
}

.nav-scrolled .nav-link {
    color: #4A243D;
}

.nav-scrolled .nav-link:hover {
    color: #5D2E4C;
}

.nav-scrolled .font-serif {
    color: #1A0E17;
}

/* ---- Hero ---- */
.hero {
    position: relative;
}

@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; opacity: 0; }
    50% { opacity: 1; }
    100% { transform: scaleY(1); transform-origin: top; opacity: 1; }
}

@keyframes scrollLineReverse {
    0% { transform: scaleY(1); transform-origin: bottom; opacity: 1; }
    100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

.animate-scroll-line {
    animation: scrollLine 1.2s ease-out forwards, scrollLineReverse 1.2s ease-in 1.2s forwards;
    animation-delay: 2s, 3.2s;
    animation-iteration-count: 2;
}

/* ---- Service Cards ---- */
.service-card {
    position: relative;
    overflow: hidden;
}

.service-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #5D2E4C, #D4A843);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s ease;
}

.service-card:hover::after {
    transform: scaleX(1);
}

/* ---- Mobile Menu ---- */
.mobile-menu {
    animation: slideDown 0.3s ease;
}

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

.mobile-menu-btn.active .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.mobile-menu-btn.active .menu-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active .menu-line:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
    width: 1.25rem;
}

/* ---- Scroll Reveal ---- */
[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

[data-animate].revealed {
    opacity: 1;
    transform: translateY(0);
}

[data-animate="delay-1"] { transition-delay: 0.1s; }
[data-animate="delay-2"] { transition-delay: 0.2s; }
[data-animate="delay-3"] { transition-delay: 0.3s; }
[data-animate="delay-4"] { transition-delay: 0.4s; }

/* ---- Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {
    [data-animate] {
        opacity: 1;
        transform: none;
        transition: none;
    }

    html {
        scroll-behavior: auto;
    }

    .animate-scroll-line {
        animation: none;
        opacity: 1;
        transform: scaleY(1);
    }
}

/* ---- Focus Styles ---- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid #D4A843;
    outline-offset: 2px;
    border-radius: 4px;
}

/* ---- Responsive ---- */
@media (max-width: 767px) {
    .font-serif {
        line-height: 1.1;
    }
}