/* ═══════════════════════════════════════════════════════
   NOLU · /inteligencia-artificial-culiacan
   Identidad oficial: #FA3F0B naranja · #23140E café · #EDE3DE crema.
   Saira títulos · Plus Jakarta Sans cuerpo · Cascadia Mono etiquetas.
   Página estática, light; sin JS para el contenido.
   ═══════════════════════════════════════════════════════ */

@font-face {
    font-family: 'Saira';
    src: url('/fonts/Saira.woff2') format('woff2');
    font-weight: 300 800;
    font-display: swap;
}
@font-face {
    font-family: 'Plus Jakarta Sans';
    src: url('/fonts/PlusJakartaSans.woff2') format('woff2');
    font-weight: 200 800;
    font-display: swap;
}
@font-face {
    font-family: 'Cascadia Mono';
    src: url('/fonts/CascadiaMono.woff2') format('woff2');
    font-weight: 200 700;
    font-display: swap;
}

:root {
    --bg: #EDE3DE;
    --bg-elev: #F4ECE7;
    --ink: #23140E;
    --ink-dim: #5E4B43;
    --line: rgba(35, 20, 14, 0.16);
    --line-strong: rgba(35, 20, 14, 0.34);
    --grid: rgba(35, 20, 14, 0.045);
    --accent: #FA3F0B;
    --accent-ink: #BA2C04; /* naranja para texto chico sobre crema: 4.8:1 (AA) */

    --display: 'Saira', 'Plus Jakarta Sans', sans-serif;
    --sans: 'Plus Jakarta Sans', -apple-system, 'Helvetica Neue', sans-serif;
    --mono: 'Cascadia Mono', 'SF Mono', monospace;

    --wide: 1120px;
    --col: 66ch;
    --pad: clamp(20px, 5vw, 48px);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { color-scheme: light only; scroll-behavior: smooth; }
body {
    background-color: var(--bg);
    background-image:
        linear-gradient(var(--grid) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: 50% 0;
    color: var(--ink);
    font-family: var(--sans);
    font-size: 17px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
::selection { background: var(--accent); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
a { color: inherit; }
.mono { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; }
.wa-icon { width: 15px; height: 15px; flex-shrink: 0; }

/* ── barra superior ── */
.top {
    max-width: var(--wide);
    margin: 0 auto;
    padding: 22px var(--pad);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    border-bottom: 1px solid var(--line);
}
.top-brand { color: var(--accent); display: block; }
.wm { height: 17px; width: auto; display: block; }

/* ── botones píldora (estilo de la casa) ── */
.pill {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 13px 22px;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    text-decoration: none;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--ink);
    background: transparent;
    transition: border-color 0.25s ease, background 0.25s ease, color 0.25s ease;
    white-space: nowrap;
}
.pill:hover { border-color: var(--ink); }
.pill-solid { background: var(--accent); border-color: var(--accent); color: var(--ink); } /* café sobre naranja: 4.9:1 (AA) */
.pill-solid:hover { background: #E23705; border-color: #E23705; }
.pill .wa-icon { color: var(--accent); }

main { max-width: var(--wide); margin: 0 auto; padding: 0 var(--pad); }

.crumbs { padding-top: 26px; color: var(--ink-dim); }
.crumbs a { text-decoration: none; }
.crumbs a:hover { color: var(--ink); }

/* ── hero ── */
.hero { position: relative; padding: clamp(48px, 9vw, 104px) 0 clamp(40px, 6vw, 72px); }
.eyebrow { color: var(--accent-ink); font-weight: 600; }
h1 {
    font-family: var(--display);
    font-weight: 700;
    font-size: clamp(2.5rem, 6.4vw, 4.6rem);
    line-height: 1.04;
    letter-spacing: -0.03em;
    margin-top: 18px;
    max-width: 15ch;
    position: relative;
}
h1::after {
    content: '';
    display: block;
    width: 96px;
    height: 2px;
    background: var(--accent);
    margin-top: 26px;
}
.lede {
    max-width: var(--col);
    margin-top: 26px;
    font-size: clamp(1.05rem, 1.6vw, 1.22rem);
    color: var(--ink-dim);
    position: relative;
}
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; position: relative; }

/* glifos de píxeles oficiales: decorativos, quietos y tenues */
.glyph { position: absolute; pointer-events: none; height: auto; opacity: 0.12; }
.glyph-hero { right: -4%; top: 14%; width: min(38vw, 420px); }
.glyph-cta { right: -2%; bottom: -10%; width: min(32vw, 340px); opacity: 0.1; }

/* ── bloques numerados ── */
.block { position: relative; padding: clamp(40px, 6vw, 72px) 0; }
.sheet-head { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.fig { color: var(--accent-ink); font-weight: 600; }
.fig::before { content: '['; color: var(--ink-dim); margin-right: 4px; }
.fig::after { content: ']'; color: var(--ink-dim); margin-left: 4px; }
.sheet-rule { flex: 1; height: 1px; background: var(--line); }
h2 {
    font-family: var(--display);
    font-weight: 700;
    font-size: clamp(1.8rem, 3.6vw, 2.7rem);
    line-height: 1.1;
    letter-spacing: -0.02em;
    max-width: 22ch;
}
.intro { max-width: var(--col); margin-top: 18px; color: var(--ink-dim); }
.intro + .pill { margin-top: 24px; }

/* tarjetas con borde, nunca rellenas de color */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
    gap: 1px;
    margin-top: 32px;
    background: var(--line);
    border: 1px solid var(--line);
}
.cards-2 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 420px), 1fr)); }
.card { background: var(--bg); padding: 28px 26px 30px; }
.card h3 {
    font-family: var(--display);
    font-weight: 600;
    font-size: 1.28rem;
    letter-spacing: -0.01em;
    line-height: 1.25;
    margin-bottom: 10px;
}
.card p { color: var(--ink-dim); font-size: 0.98rem; }
.card-cta { background: var(--bg-elev); }
.card-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 14px; text-decoration: none; font-weight: 600; }
.card-link .wa-icon { color: var(--accent); }
.card-link:hover span { text-decoration: underline; text-underline-offset: 4px; }
.case-tag { color: var(--ink-dim); margin-bottom: 12px; }
.case-tag .acc { color: var(--accent-ink); font-weight: 600; }

/* giros: ficha */
.giros { margin-top: 26px; border-top: 1px solid var(--line); max-width: 760px; }
.giro {
    display: grid;
    grid-template-columns: minmax(180px, 280px) 1fr;
    gap: 18px;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
}
.giro dt { color: var(--ink-dim); padding-top: 4px; }
.giro dd { font-weight: 600; }

/* método */
.steps { list-style: none; margin-top: 30px; display: grid; gap: 0; border-top: 1px solid var(--line); max-width: 860px; }
.steps li {
    display: grid;
    grid-template-columns: 56px 220px 1fr;
    gap: 18px;
    align-items: baseline;
    padding: 20px 0;
    border-bottom: 1px solid var(--line);
}
.step-n { color: var(--accent-ink); font-weight: 600; }
.steps h3 { font-family: var(--display); font-weight: 600; font-size: 1.2rem; }
.steps p { color: var(--ink-dim); font-size: 0.98rem; }

/* FAQ nativo: sin JS, el texto siempre está en el HTML */
.faq { margin-top: 26px; border-top: 1px solid var(--line); max-width: 860px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
    cursor: pointer;
    list-style: none;
    padding: 20px 40px 20px 0;
    position: relative;
    font-family: var(--display);
    font-weight: 600;
    font-size: 1.12rem;
    line-height: 1.35;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
    content: '+';
    position: absolute;
    right: 4px;
    top: 16px;
    font-family: var(--mono);
    font-size: 1.3rem;
    color: var(--accent-ink);
    transition: transform 0.3s ease;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 0 22px; color: var(--ink-dim); max-width: var(--col); }

/* cierre */
.closing {
    margin: clamp(24px, 4vw, 48px) 0 0;
    padding: clamp(44px, 7vw, 80px) clamp(22px, 5vw, 56px);
    border: 1px solid var(--line-strong);
    background: var(--bg-elev);
    overflow: hidden;
}
.closing h2, .closing .intro, .closing .actions { position: relative; }

/* ── pie ── */
.foot {
    max-width: var(--wide);
    margin: clamp(48px, 7vw, 88px) auto 0;
    padding: 30px var(--pad) 44px;
    border-top: 1px solid var(--line);
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 24px 40px;
    align-items: start;
}
.foot-brand a { color: var(--accent); }
.foot-brand .wm { height: 15px; }
.foot-brand p { margin-top: 14px; color: var(--ink-dim); line-height: 1.9; }
.foot-brand p a { color: var(--ink-dim); text-transform: none; letter-spacing: 0.04em; }
.foot-links { list-style: none; display: grid; gap: 10px; }
.foot-links a { text-decoration: none; color: var(--ink-dim); }
.foot-links a:hover, .foot-brand p a:hover { color: var(--ink); }
.foot-badge { display: block; }
.foot-copy { grid-column: 1 / -1; color: var(--ink-dim); padding-top: 18px; border-top: 1px solid var(--line); }

/* ── móvil ── */
@media (max-width: 760px) {
    body { font-size: 16px; }
    .top .pill { padding: 10px 16px; }
    .glyph-hero { top: auto; bottom: -6%; right: -18%; width: 64vw; opacity: 0.08; }
    .glyph-cta { display: none; }
    .actions .pill { width: 100%; justify-content: center; }
    .giro { grid-template-columns: 1fr; gap: 4px; }
    .steps li { grid-template-columns: 40px 1fr; }
    .steps li p { grid-column: 2; }
    .foot { grid-template-columns: 1fr auto; }
}

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