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

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

body {
    margin: 0;
    overflow-x: hidden;
}

::selection {
    background: rgba(94, 234, 212, 0.25);
    color: #5EEAD4;
}

/* ── Hero animations (above the fold — always visible) ── */
.hero-eyebrow {
    animation: fadeDown 0.8s ease forwards;
    animation-delay: 0.2s;
    opacity: 0;
}

.hero-title {
    animation: fadeUp 1s ease forwards;
    animation-delay: 0.4s;
    opacity: 0;
}

.hero-subtitle {
    animation: fadeUp 1s ease forwards;
    animation-delay: 0.7s;
    opacity: 0;
}

.hero-ctas {
    animation: fadeUp 1s ease forwards;
    animation-delay: 0.9s;
    opacity: 0;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeDown {
    from {
        opacity: 0;
        transform: translateY(-12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Scroll reveal (below the fold only — progressive enhancement) ── */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(32px);
        transition: opacity 0.7s ease, transform 0.7s ease;
    }

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

    /* Stagger children */
    .reveal-delay-1 { transition-delay: 0.1s; }
    .reveal-delay-2 { transition-delay: 0.2s; }
    .reveal-delay-3 { transition-delay: 0.3s; }
}

/* ── Card hover ── */
.card-elevated {
    transition: transform 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease;
}

.card-elevated:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px -20px rgba(94, 234, 212, 0.08);
}

/* ── Scroll marquee ── */
@keyframes scroll-left {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.animate-scroll-left {
    display: flex;
    gap: 1rem;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
}

/* ── Back to top ── */
.back-to-top {
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px);
    transition: opacity 0.3s ease, transform 0.3s ease, background 0.2s ease;
}

.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

/* ── Mobile menu ── */
#mobile-menu {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#mobile-menu.open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

#mobile-menu.closed {
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
}

.mobile-link {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#mobile-menu.open .mobile-link {
    opacity: 1;
    transform: translateY(0);
}

#mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.05s; }
#mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.1s; }
#mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.15s; }
#mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.2s; }
#mobile-menu.open .mobile-link:nth-child(5) { transition-delay: 0.25s; }

/* ── Header state ── */
#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, 0.05);
}

/* ── Focus styles ── */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid #5EEAD4;
    outline-offset: 2px;
    border-radius: 4px;
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }

    .animate-scroll-left {
        animation: none;
    }
}

/* ── Print ── */
@media print {
    #site-header,
    .back-to-top,
    .animate-scroll-left {
        display: none !important;
    }

    body {
        background: white;
        color: black;
    }
}