/* ─── Base & Reset ─── */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
}

::selection {
    background: rgba(13, 148, 136, 0.2);
    color: #0f766e;
}

/* ─── Scroll Reveal (progressive enhancement) ─── */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(32px);
        transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    .reveal:nth-child(2) { transition-delay: 0.1s; }
    .reveal:nth-child(3) { transition-delay: 0.2s; }
    .reveal:nth-child(4) { transition-delay: 0.3s; }
}

/* ─── Floating Stat Cards ─── */
@media (prefers-reduced-motion: no-preference) {
    .stat-card {
        animation: float 6s ease-in-out infinite;
    }

    .card-1 { animation-delay: 0s; }
    .card-2 { animation-delay: -1.5s; }
    .card-3 { animation-delay: -3s; }
    .card-4 { animation-delay: -4.5s; }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* ─── Scroll Indicator ─── */
@media (prefers-reduced-motion: no-preference) {
    .scroll-indicator {
        display: flex;
        flex-direction: column;
        align-items: center;
        opacity: 0.7;
        transition: opacity 0.3s;
    }

    .scroll-indicator:hover {
        opacity: 1;
    }
}

/* ─── Room Cards ─── */
.room-card {
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease;
}

.room-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.15);
}

/* ─── Experience Cards ─── */
.experience-card {
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), background 0.3s ease, border-color 0.3s ease;
}

.experience-card:hover {
    transform: translateY(-4px);
}

/* ─── Navbar ─── */
#site-header {
    background: transparent;
    transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}

#site-header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05), 0 4px 20px rgba(0, 0, 0, 0.05);
}

/* ─── Mobile Menu Transition ─── */
#mobile-menu {
    animation: slideDown 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

/* ─── Button Ripple Effect ─── */
button, a {
    -webkit-tap-highlight-color: transparent;
}

/* ─── Image Loading ─── */
img {
    background-color: #e7e5e4;
}

/* ─── Responsive ─── */
@media (max-width: 767px) {
    .font-serif {
        line-height: 1.15;
    }
}