/* ── base.css — reset, layout, reveal, i18n ────────────────── */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
    background: var(--bg);
    color: var(--ink);
    font-family: var(--sans);
    line-height: 1.5;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    transition: background .3s, color .3s;
}

a { color: inherit; text-decoration: none; }
a, button { touch-action: manipulation; }
img { max-width: 100%; display: block; }

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 4px;
}

h1, h2, h3 { text-wrap: balance; }

.wrap, .container { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }
section { position: relative; z-index: 1; padding: 88px 0; }
header, nav, footer { position: relative; z-index: 1; }

/* ── Ambient background ─────────────────────────────────────── */
.ambient {
    position: fixed; inset: 0; z-index: 0; pointer-events: none;
    background:
        radial-gradient(ellipse 900px 600px at 10% -10%, var(--glass-fill), transparent 60%),
        radial-gradient(ellipse 700px 500px at 100% 20%, var(--glass-fill), transparent 55%);
    transition: background .3s;
}

/* ── Scroll reveal ──────────────────────────────────────────── */
.reveal {
    opacity: 0; transform: translateY(28px);
    transition: opacity .9s cubic-bezier(.22, 1, .36, 1), transform .9s cubic-bezier(.22, 1, .36, 1);
}
.reveal.revealed { opacity: 1; transform: translateY(0); }

.reveal-stagger > * {
    opacity: 0; transform: translateY(20px);
    transition: opacity .7s cubic-bezier(.22, 1, .36, 1), transform .7s cubic-bezier(.22, 1, .36, 1);
}
.reveal-stagger.revealed > * { opacity: 1; transform: translateY(0); }
.reveal-stagger.revealed > *:nth-child(1) { transition-delay: 0s; }
.reveal-stagger.revealed > *:nth-child(2) { transition-delay: .07s; }
.reveal-stagger.revealed > *:nth-child(3) { transition-delay: .14s; }
.reveal-stagger.revealed > *:nth-child(4) { transition-delay: .21s; }
.reveal-stagger.revealed > *:nth-child(5) { transition-delay: .28s; }
.reveal-stagger.revealed > *:nth-child(6) { transition-delay: .35s; }

/* ── i18n (ES por defecto; .lang-en en body activa inglés) ─────
   Solo se oculta el idioma inactivo; el activo conserva su
   display natural (block, inline, list-item, flex…). */
body:not(.lang-en) [data-lang="en"] { display: none !important; }
body.lang-en [data-lang="es"] { display: none !important; }

/* ── prefers-reduced-motion ─────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        transition-duration: .01ms !important;
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
    }
    .reveal, .reveal-stagger > * { opacity: 1; transform: none; }
}