/* ─── Base & Utilities ─── */
html {
    scroll-behavior: smooth;
}

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

#site-header.scrolled {
    background: rgba(5, 13, 26, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
}

/* ─── Mobile Menu ─── */
#mobile-menu {
    animation: slideDown 0.25s ease-out;
}

#mobile-menu.hidden {
    animation: slideUp 0.2s ease-in forwards;
}

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

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

/* ─── Room Cards ─── */
.room-card {
    will-change: transform;
}

/* ─── Amenity Cards ─── */
.amenity-card {
    will-change: transform;
}

/* ─── Scroll Reveal (progressive enhancement) ─── */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    }

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

    /* Stagger children */
    .reveal-stagger > * {
        opacity: 0;
        transform: translateY(16px);
        transition: opacity 0.5s ease-out, transform 0.5s ease-out;
    }

    .reveal-stagger.revealed > *:nth-child(1) { transition-delay: 0.05s; }
    .reveal-stagger.revealed > *:nth-child(2) { transition-delay: 0.1s; }
    .reveal-stagger.revealed > *:nth-child(3) { transition-delay: 0.15s; }
    .reveal-stagger.revealed > *:nth-child(4) { transition-delay: 0.2s; }
    .reveal-stagger.revealed > *:nth-child(5) { transition-delay: 0.25s; }
    .reveal-stagger.revealed > *:nth-child(6) { transition-delay: 0.3s; }

    .reveal-stagger.revealed > * {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ─── FAQ ─── */
.faq-btn {
    width: 100%;
}

.faq-icon {
    transition: transform 0.25s ease;
}

.faq-btn[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* ─── Scrollbar (subtle) ─── */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #0a1628;
}
::-webkit-scrollbar-thumb {
    background: rgba(74, 222, 128, 0.3);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(74, 222, 128, 0.5);
}

/* ─── Selection ─── */
::selection {
    background: rgba(74, 222, 128, 0.25);
    color: #0a1628;
}