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

body {
    overflow-x: hidden;
}

::selection {
    background: rgba(152, 212, 200, 0.3);
    color: #0B1D3A;
}

/* ── Scroll Reveal (progressive enhancement) ── */
@media (prefers-reduced-motion: no-preference) {
    .reveal-up {
        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-left {
        opacity: 0;
        transform: translateX(-40px);
        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-right {
        opacity: 0;
        transform: translateX(40px);
        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-up.revealed,
    .reveal-left.revealed,
    .reveal-right.revealed {
        opacity: 1;
        transform: translate(0, 0);
    }
}

/* Ensure content is visible even without JS */
@media (prefers-reduced-motion: reduce) {
    .reveal-up,
    .reveal-left,
    .reveal-right {
        opacity: 1;
        transform: none;
    }
}

/* ── Hero reveal (above fold — always visible) ── */
#hero .reveal-up {
    opacity: 1;
    transform: none;
    animation: heroReveal 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

#hero .reveal-up:nth-child(1) { animation-delay: 0.1s; opacity: 0; }
#hero .reveal-up:nth-child(2) { animation-delay: 0.25s; opacity: 0; }
#hero .reveal-up:nth-child(3) { animation-delay: 0.4s; opacity: 0; }
#hero .reveal-up:nth-child(4) { animation-delay: 0.55s; opacity: 0; }

@keyframes heroReveal {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Navbar ── */
#site-header {
    background: transparent;
    backdrop-filter: none;
    transition: background 0.4s ease, backdrop-filter 0.4s ease, box-shadow 0.4s ease;
}

#site-header.scrolled {
    background: rgba(244, 250, 248, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(11, 29, 58, 0.06);
}

/* ── Mobile Menu ── */
#mobile-menu.open {
    opacity: 1;
    pointer-events: all;
}

#mobile-menu.closed {
    opacity: 0;
    pointer-events: none;
}

.menu-line {
    display: block;
}

#menu-toggle.active .menu-line:first-child {
    transform: rotate(45deg) translate(3px, 3px);
}

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

#menu-toggle.active .menu-line:last-child {
    width: 1.5rem;
    transform: rotate(-45deg) translate(3px, -3px);
}

/* ── Image hover transitions ── */
.overflow-hidden {
    will-change: transform;
}

/* ── Form focus styles ── */
input:focus,
textarea:focus {
    border-color: rgba(152, 212, 200, 0.6) !important;
}

/* ── Smooth scroll offset for fixed header ── */
section[id] {
    scroll-margin-top: 80px;
}

/* ── Responsive tweaks ── */
@media (max-width: 767px) {
    #hero .reveal-up:nth-child(1) { animation-delay: 0.05s; }
    #hero .reveal-up:nth-child(2) { animation-delay: 0.15s; }
    #hero .reveal-up:nth-child(3) { animation-delay: 0.25s; }
    #hero .reveal-up:nth-child(4) { animation-delay: 0.35s; }
}