/* ============================================================
   Base · DARK-FIRST · reset, tipografía editorial, accesibilidad
   ============================================================ */

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    background: var(--paper);
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-sans);
    font-size: var(--t-body);
    line-height: 1.6;
    font-weight: 400;
    font-feature-settings: 'ss01', 'cv11';
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

img, video, svg { max-width: 100%; height: auto; display: block; }

/* ---------- Tipografía display ---------- */
.display {
    font-size: var(--t-display);
    font-weight: 300;
    line-height: 0.95;
    letter-spacing: var(--tracking-tight);
    margin: 0;
}

h1, .h1 {
    font-size: var(--t-h1);
    font-weight: 400;
    line-height: 1.05;
    letter-spacing: var(--tracking-tight);
    margin: 0 0 1rem;
    color: var(--ink);
}
h2, .h2 {
    font-size: var(--t-h2);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: var(--tracking-snug);
    margin: 0 0 0.75rem;
    color: var(--ink);
}
h3, .h3 {
    font-size: var(--t-h3);
    font-weight: 500;
    line-height: 1.3;
    letter-spacing: var(--tracking-snug);
    margin: 0 0 0.5rem;
    color: var(--ink);
}
h4, .h4 {
    font-size: var(--t-h4);
    font-weight: 500;
    line-height: 1.4;
    margin: 0 0 0.4rem;
    color: var(--ink);
}

p { margin: 0 0 1rem; color: var(--ink-soft); }
p:last-child { margin-bottom: 0; }

.lead {
    font-size: var(--t-body-l);
    line-height: 1.55;
    color: var(--ink-soft);
    max-width: var(--prose-max);
}

.muted { color: var(--ink-muted); }
.faint { color: var(--ink-faint); }

/* eyebrow — etiqueta mono mayúscula sobre títulos */
.eyebrow {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: var(--t-mono-eyebrow);
    font-weight: 500;
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    color: var(--ink-muted);
    margin-bottom: 1rem;
}

/* highlighter — palabra resaltada en chartreuse, texto en --on-volt */
.mark {
    background: var(--volt);
    color: var(--on-volt);
    padding: 0 0.15em;
    box-decoration-break: clone;
    -webkit-box-decoration-break: clone;
}

a {
    color: var(--ink);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.18em;
    transition: color var(--t-fast) var(--ease-out);
}
a:hover { color: var(--volt); }

::selection {
    background: var(--volt);
    color: var(--on-volt);
}

/* ---------- Layout primitives ---------- */
.container {
    width: 100%;
    max-width: var(--content-max);
    margin: 0 auto;
    padding: 0 var(--gutter);
}
.prose { max-width: var(--prose-max); }
.section { padding: var(--section-py) 0; }
.section--tight { padding: var(--section-py-tight) 0; }

/* sección elevada sutil — para variar el ritmo visual */
.section--soft { background: var(--paper-soft); }

/* sección ultra-dark — para showcase de producto/specs */
.section--dark { background: var(--paper-deep); }

/* divisor sutil */
.rule {
    border: 0;
    border-top: 1px solid var(--line);
    margin: 0;
}

/* ---------- Accessibility ---------- */
.sr-only {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
:focus-visible {
    outline: 2px solid var(--volt);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

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