/* ─── CUSTOM PROPERTIES ─── */
:root {
    --plum-900: #2a131e;
    --plum-800: #4a2536;
    --plum-700: #6b334c;
    --plum-600: #843f5d;
    --plum-500: #a05578;
    --plum-300: #d6a3c0;
    --plum-200: #e8cce0;
    --plum-100: #f3e6ee;
    --plum-50: #faf4f8;
    --amber-500: #f5a623;
    --amber-400: #ffd76b;
    --amber-300: #ffe9a0;
    --amber-200: #fff3cd;
    --amber-100: #fffbeb;
}

/* ─── BASE ─── */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ─── CARD ELEVATE ─── */
.card-elevate {
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                box-shadow 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.card-elevate:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 60px rgba(42, 19, 30, 0.12);
}

/* ─── FLOATING ANIMATIONS ─── */
@keyframes float-slow {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

@keyframes float-medium {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-14px); }
}

@keyframes float-fast {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
}

.animate-float-slow {
    animation: float-slow 5s ease-in-out infinite;
}

.animate-float-medium {
    animation: float-medium 4s ease-in-out infinite;
}

.animate-float-fast {
    animation: float-fast 3.5s ease-in-out infinite;
}

/* ─── SCROLL REVEAL (progressive enhancement — hidden by default, shown by JS) ─── */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                    transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

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

/* ─── NAV SCROLLED STATE ─── */
#site-header.scrolled {
    background: rgba(250, 244, 248, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 20px rgba(42, 19, 30, 0.08);
}

/* ─── NAV LINK UNDERLINE ANIMATION ─── */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--amber-500);
    transition: width 0.3s ease;
}

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

/* ─── MOBILE MENU TRANSITIONS ─── */
#mobile-menu {
    animation: slideDown 0.3s ease forwards;
}

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

/* ─── BUTTON FOCUS STYLES ─── */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--amber-500);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ─── SELECTION ─── */
::selection {
    background: var(--plum-200);
    color: var(--plum-900);
}