/* ------------------------------------------------------------
   IA para médicos · iaparamedicos.cl · v2
   Secciones blancas y oscuras alternadas. Tinta casi negra sobre
   blanco; sobre oscuro, texto claro con el lima Brain24 como acento.
   ------------------------------------------------------------ */

:root {
  --bg: #ffffff;
  --card: #ffffff;
  --bg-tint: #f7f7f8;
  --ink: #0b0b0f;
  --ink-2: #4b4b57;
  --ink-3: #7c7c89;
  --line: #e6e6ea;
  --line-strong: #d4d4da;
  --brand: #2c0970;
  --brand-soft: #efe9fb;
  --accent: #2c0970;
  --lime: #bce836;
  --btn-bg: #0b0b0f;
  --btn-fg: #ffffff;
  --ok: #2e9e5b;
  --warn: #e0a800;
  --bad: #d64545;
  --check: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232c0970' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><path d='M5 12l5 5L20 7'/></svg>");
  --radius: 16px;
  --radius-sm: 10px;
  --max: 1120px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.section--dark, .footer {
  --bg: #0b0b0f;
  --card: #18181f;
  --bg-tint: #22222b;
  --ink: #f7f7f9;
  --ink-2: #c4c4cf;
  --ink-3: #8f8f9c;
  --line: #2a2a33;
  --line-strong: #44444f;
  --brand-soft: rgba(188,232,54,.14);
  --accent: #bce836;
  --btn-bg: #ffffff;
  --btn-fg: #0b0b0f;
  --check: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23bce836' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><path d='M5 12l5 5L20 7'/></svg>");
  background: var(--bg);
  color: var(--ink);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; font-family: var(--font); font-size: 16px; line-height: 1.6;
  color: var(--ink); background: var(--bg);
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p, blockquote, figure, fieldset { margin: 0; }
fieldset { padding: 0; border: 0; min-width: 0; }
h1, h2, h3 { letter-spacing: -0.02em; line-height: 1.15; font-weight: 600; }
h2 { font-size: clamp(1.75rem, 1.2rem + 1.8vw, 2.5rem); }
h3 { font-size: 1.125rem; }
[hidden] { display: none !important; }

.container { width: min(100% - 2.5rem, var(--max)); margin-inline: auto; }
.skip { position: absolute; left: 1rem; top: -3rem; background: var(--ink); color: #fff; padding: .5rem .75rem; border-radius: 8px; z-index: 100; }
.skip:focus { top: 1rem; }

/* 404 */
.not-found { min-height: 100vh; display: grid; place-items: center; padding: 2rem; background: var(--bg-tint); }
.not-found__card { width: min(100%, 38rem); padding: clamp(2rem, 6vw, 4rem); background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); text-align: center; }
.not-found__card h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
.not-found__card p:not(.eyebrow) { margin: 1rem auto 2rem; color: var(--ink-2); }

/* Botones */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  padding: .85rem 1.35rem; border-radius: 999px; cursor: pointer;
  font-family: inherit; font-weight: 500; font-size: .95rem; text-decoration: none; line-height: 1;
  border: 1px solid transparent; transition: background .15s, border-color .15s, color .15s, transform .15s;
  white-space: nowrap;
}
.btn--primary { background: var(--btn-bg); color: var(--btn-fg); }
.btn--primary:hover { background: var(--lime); color: #0b0b0f; }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn--ghost:hover { border-color: var(--ink); }
.btn--sm { padding: .6rem 1rem; font-size: .9rem; }
.btn--block { width: 100%; white-space: normal; text-align: center; }
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: .6; cursor: wait; }

.eyebrow { font-size: .78rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin-bottom: .9rem; }

/* Nav */
.nav { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.85); backdrop-filter: saturate(180%) blur(12px); border-bottom: 1px solid var(--line); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: .6rem; text-decoration: none; font-weight: 600; letter-spacing: -0.01em; }
.brand__mark { width: 22px; height: 22px; border-radius: 7px; background: var(--brand); position: relative; flex: none; }
.footer .brand__mark { background: #fff; }
.brand__mark::after { content: ""; position: absolute; inset: 6px; border-radius: 3px; background: var(--lime); }
.footer .brand__mark::after { background: var(--brand); }
.nav__links { display: flex; gap: 1.75rem; }
.nav__links a { text-decoration: none; font-size: .95rem; color: var(--ink-2); }
.nav__links a:hover { color: var(--ink); }

/* 1. Hero */
.hero { padding: clamp(3rem, 6vw, 5.5rem) 0 clamp(3rem, 5vw, 4.5rem); }
.hero__center { max-width: 840px; margin: 0 auto; text-align: center; }
.hero__center .hero__lead { margin-inline: auto; max-width: 640px; }
.hero__center .hero__cta { justify-content: center; }
.hero__badge { display: inline-flex; align-items: center; padding: .5rem .95rem; margin-bottom: 1.4rem; border: 1px solid var(--line-strong); border-radius: 999px; background: var(--bg-tint); color: var(--ink); letter-spacing: .05em; }
.hero__title { font-size: clamp(2.2rem, 1.4rem + 3vw, 3.7rem); font-weight: 700; letter-spacing: -0.03em; }
.hero__title em { font-style: normal; color: var(--brand); }
.hero__lead { margin-top: 1.4rem; max-width: 560px; font-size: clamp(1.05rem, 1rem + .3vw, 1.2rem); color: var(--ink-2); }
.hero__cta { display: flex; gap: .75rem; flex-wrap: wrap; margin-top: 2rem; }
.hero__proof { margin-top: 1.5rem; font-size: .9rem; color: var(--ink-2); }
.hero__proof a { color: var(--ink); }
.stars { color: #f5b301; letter-spacing: .05em; margin-right: .35rem; }

/* Secciones */
.section { padding: clamp(4rem, 7vw, 6.5rem) 0; }
.section__head { max-width: 680px; margin-bottom: 3rem; }
.section__lead { margin-top: 1rem; color: var(--ink-2); font-size: 1.05rem; }
.section__head--row { max-width: none; display: flex; align-items: flex-end; justify-content: space-between; gap: 2rem; }
.section__head--row > div:first-child { max-width: 680px; }

/* 2. Casos: cabecera con foto + seis tarjetas pequeñas */
.cases__head { display: grid; grid-template-columns: 7fr 5fr; gap: 3rem; align-items: center; margin-bottom: 2.75rem; }
.cases__head .section__head { margin-bottom: 0; }
.cases__media { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }
.cases__media img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; object-position: 100% 50%; }
.cases { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.case { padding: 1.35rem 1.4rem 1.45rem; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
.case img { width: 40px; height: 40px; border-radius: 10px; object-fit: cover; background: #fff; margin-bottom: 1rem; }
.case h3 { font-size: 1.05rem; font-weight: 600; letter-spacing: -0.01em; margin-bottom: .35rem; }
.case p { font-size: .95rem; color: var(--ink-2); line-height: 1.5; }
.cases__foot { margin-top: 1.75rem; color: var(--ink-2); }
.cases__foot a { color: var(--ink); }

/* 3. Autoevaluación */
.quiz__intro { max-width: 760px; margin: 0 auto; text-align: center; }
.quiz__intro h2 { font-size: clamp(1.6rem, 1.1rem + 1.7vw, 2.3rem); }
.quiz__intro h2 { margin-bottom: 1.75rem; }
.quiz__cred { margin-top: 1.25rem; font-size: .85rem; color: var(--ink-3); }

.quiz, .quiz__capture, .quiz__result { max-width: 760px; margin-inline: auto; }
.quiz { padding: 2.5rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-tint); }
.quiz__progress { height: 6px; border-radius: 999px; background: var(--line); overflow: hidden; margin-bottom: 1.5rem; }
.quiz__progress span { display: block; height: 100%; width: 0; background: var(--brand); transition: width .25s; }
.quiz__meta { font-size: .8rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 1rem; }
.quiz__q { font-size: clamp(1.25rem, 1rem + 1vw, 1.7rem); letter-spacing: -0.02em; min-height: 3.2em; }
.quiz__answers { display: flex; gap: .75rem; margin-top: 1.75rem; }
.btn--answer { flex: 1; padding: 1rem; font-size: 1.05rem; background: var(--card); color: var(--ink); border-color: var(--line-strong); }
.btn--answer:hover { border-color: var(--brand); background: var(--brand-soft); }
.quiz__back { margin-top: 1.25rem; background: none; border: 0; font: inherit; font-size: .88rem; color: var(--ink-3); cursor: pointer; padding: 0; }
.quiz__back:hover { color: var(--ink); }
.quiz__back[disabled] { visibility: hidden; }

.quiz__capture { display: grid; gap: 1.1rem; padding: 2.5rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); box-shadow: 0 1rem 3rem rgba(11,11,15,.06); }
.quiz__capture h3 { font-size: 1.5rem; }
.quiz__capture-lead { margin: -.5rem 0 .25rem; color: var(--ink-2); }
.quiz__capture > .btn { justify-self: start; }
.quiz__capture .eyebrow, .quiz__capture h3 { margin-bottom: 0; }

.quiz__result { display: grid; grid-template-columns: 5fr 7fr; gap: 2.5rem; max-width: 980px; }
.result__score { padding: 2rem; border-radius: var(--radius); background: var(--ink); color: #fff; }
.result__score .eyebrow { color: var(--lime); }
.result__num { font-size: 4.5rem; font-weight: 700; letter-spacing: -0.04em; line-height: 1; }
.result__den { font-size: 1.5rem; font-weight: 500; opacity: .6; margin-left: .15rem; }
.result__tier { display: flex; align-items: center; gap: .6rem; margin-top: 1rem; font-weight: 600; font-size: 1.1rem; }
.dot { width: 14px; height: 14px; border-radius: 50%; background: var(--warn); flex: none; }
.dot--low { background: var(--bad); } .dot--mid { background: var(--warn); } .dot--high { background: var(--ok); }
.result__msg { margin-top: 1rem; color: rgba(255,255,255,.75); font-size: .95rem; }
.result__cats { display: grid; gap: 1.1rem; align-content: start; }
.cat { display: grid; gap: .4rem; }
.cat__head { display: flex; justify-content: space-between; font-size: .92rem; }
.cat__head strong { font-weight: 600; }
.cat__head span { color: var(--ink-3); }
.cat__bar { height: 10px; border-radius: 999px; background: var(--line); overflow: hidden; }
.cat__bar i { display: block; height: 100%; width: 0; background: var(--brand); transition: width .6s; }
.cat--hi .cat__bar i { background: var(--ok); }
.cat--lo .cat__bar i { background: var(--bad); }
.cat__line { font-size: .88rem; color: var(--ink-2); }
.result__alert { grid-column: 1 / -1; padding: 1.25rem 1.5rem; border-radius: var(--radius); background: #fff4f4; border: 1px solid #f0c9c9; }
.result__alert .eyebrow { color: var(--bad); margin-bottom: .5rem; }
.result__alert ul { display: grid; gap: .6rem; }
.result__alert li { color: var(--ink); font-size: .95rem; }
.result__reco { grid-column: 1 / -1; padding-top: 2rem; border-top: 1px solid var(--line); }
.result__reco h3 { margin-bottom: 1rem; }
.result__reco ul { display: grid; gap: .75rem; }
.result__reco li { display: flex; gap: .6rem; color: var(--ink-2); }
.result__reco li strong { color: var(--ink); font-weight: 600; }
.result__reco li::before { content: ""; flex: none; width: 18px; height: 18px; margin-top: .25rem; border-radius: 50%; background: var(--brand-soft) var(--check) center / 11px no-repeat; }
.result__cta { display: flex; gap: .75rem; flex-wrap: wrap; margin-top: 1.75rem; }

/* 4. Tu caso */
.personal { display: grid; grid-template-columns: 6fr 6fr; gap: 3.5rem; align-items: start; }
.personal__text h2 { margin-bottom: 1rem; }
.timeline li { display: grid; grid-template-columns: 48px 1fr; gap: 1rem; padding: 1.5rem 0; border-top: 1px solid var(--line); }
.timeline li:first-child { border-top: 0; padding-top: 0; }
.timeline span { font-size: .8rem; font-weight: 600; color: var(--accent); letter-spacing: .06em; padding-top: .25rem; }
.timeline h3 { font-size: 1.05rem; margin-bottom: .35rem; }
.timeline p { font-size: .92rem; color: var(--ink-2); }

/* 5. Carrusel (testimonios) */
.carousel__nav { display: flex; gap: .5rem; flex: none; }
.carousel__btn { width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--line-strong); background: transparent; color: var(--ink); font-size: 1rem; cursor: pointer; display: grid; place-items: center; transition: border-color .15s, opacity .15s; }
.carousel__btn:hover { border-color: var(--ink); }
.carousel__btn[disabled] { opacity: .35; cursor: default; }
.carousel { display: flex; gap: 1.25rem; overflow-x: auto; scroll-snap-type: x mandatory; scroll-behavior: smooth; scrollbar-width: none; padding-bottom: .5rem; }
.carousel::-webkit-scrollbar { display: none; }
.carousel:focus-visible { outline: 2px solid var(--accent); outline-offset: 8px; }
.slide { flex: 0 0 clamp(280px, 30vw, 400px); scroll-snap-align: start; }
.review { display: flex; flex-direction: column; gap: 1.25rem; padding: 1.6rem; background: var(--bg-tint); border: 1px solid var(--line); border-radius: var(--radius); }
.review__quote { font-size: 1rem; color: var(--ink); flex: 1; }
.review__quote::before { content: "“"; color: var(--ink-3); }
.review__quote::after { content: "”"; color: var(--ink-3); }
.review__author { display: flex; align-items: center; gap: .75rem; padding-top: 1rem; border-top: 1px solid var(--line); }
.review__author div { display: flex; flex-direction: column; line-height: 1.35; }
.review__author strong { font-size: .92rem; font-weight: 600; }
.review__author span { font-size: .8rem; color: var(--ink-3); }
.avatar { width: 40px; height: 40px; border-radius: 50%; flex: none; display: grid; place-items: center; font-size: .75rem; font-weight: 600; background: var(--brand-soft); color: var(--accent); }
img.avatar { width: 44px; height: 44px; object-fit: cover; object-position: 50% 20%; border: 2px solid var(--line); }
.review--cta { background: var(--lime); border-color: var(--lime); color: #0b0b0f; justify-content: center; }
.review--cta p { font-size: 1.15rem; font-weight: 500; letter-spacing: -0.01em; }
.review--cta .btn--primary { background: #0b0b0f; color: #fff; align-self: flex-start; }
.review--cta .btn--primary:hover { background: var(--brand); }
.senja-slot { margin-bottom: 1rem; }

/* 6. Programa */
.syllabus { border-top: 1px solid var(--line); }
.syllabus__item { display: grid; grid-template-columns: 76px minmax(0, 1.6fr) minmax(0, 1fr); gap: 2rem; align-items: start; padding: 1.7rem 0; border-bottom: 1px solid var(--line); }
.syllabus__num { font-size: clamp(2rem, 3.2vw, 2.8rem); line-height: .85; font-weight: 600; letter-spacing: -0.04em; color: var(--line-strong); }
.syllabus__body h3 { font-size: 1.15rem; letter-spacing: -0.02em; margin-bottom: .4rem; }
.syllabus__body p { color: var(--ink-2); font-size: .95rem; }
.tools__row { display: flex; flex-wrap: wrap; gap: .7rem 1.4rem; align-items: center; align-content: start; }
.tools__row li { display: flex; align-items: center; gap: .5rem; font-size: .84rem; color: var(--ink-2); }
.tools__row img { width: 26px; height: 26px; border-radius: 7px; object-fit: contain; background: #fff; padding: 3px; }

/* 7. Docente */
.bio { display: grid; grid-template-columns: 5fr 7fr; gap: 3.5rem; align-items: center; }
.bio__photo { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }
.bio__photo img { width: 100%; aspect-ratio: 996 / 1579; object-fit: cover; }
.bio__text h2 { margin-bottom: 1.25rem; }
.bio__text p + p { margin-top: 1rem; }
.bio__text p { color: var(--ink-2); }
.bio__text a { color: var(--ink); text-underline-offset: 3px; }

/* 8. Planes */
.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; align-items: stretch; }
.plan { position: relative; display: flex; flex-direction: column; gap: 1.1rem; align-items: flex-start; padding: 2rem; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
.plan--featured { border-color: var(--lime); box-shadow: 0 0 0 1px var(--lime); }
.plan__badge { position: absolute; top: -0.8rem; left: 2rem; font-size: .72rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; padding: .3rem .7rem; border-radius: 999px; background: var(--lime); color: #0b0b0f; }
.plan__badge--soft { background: var(--bg-tint); color: var(--ink-2); border: 1px solid var(--line-strong); }
.plan__name { font-size: .85rem; font-weight: 600; color: var(--ink-3); text-transform: uppercase; letter-spacing: .06em; }
.plan__price { font-size: clamp(2.4rem, 4vw, 3.4rem); font-weight: 600; letter-spacing: -0.035em; line-height: 1; }
.plan__price span { font-size: .95rem; font-weight: 500; color: var(--ink-3); letter-spacing: 0; margin-left: .25rem; }
.plan__tagline { font-size: 1rem; color: var(--ink); font-weight: 500; letter-spacing: -0.01em; }
.plan__features { display: grid; gap: .75rem; width: 100%; flex: 1; }
.plan__features li { display: flex; gap: .6rem; align-items: flex-start; font-size: .93rem; color: var(--ink-2); }
.plan__features li strong { color: var(--ink); font-weight: 600; }
.plan__features li::before { content: ""; flex: none; width: 18px; height: 18px; margin-top: .2rem; border-radius: 50%; background: var(--brand-soft) var(--check) center / 11px no-repeat; }
.plan > .btn { margin-top: .5rem; }
.details { margin: 0; display: grid; gap: 1.4rem; }
.details--row { grid-template-columns: repeat(4, 1fr); margin-top: 2.5rem; padding-top: 2rem; border-top: 1px solid var(--line); }
.details div { display: grid; gap: .3rem; }
.details dt { font-size: .72rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); }
.details dd { margin: 0; font-weight: 500; font-size: .95rem; }

/* 9. Inscripción */
.enroll { display: grid; grid-template-columns: 5fr 7fr; gap: 3.5rem; align-items: start; }
.enroll__text h2 { margin-bottom: 1.5rem; }
.steps { display: grid; gap: 1rem; }
.steps li { display: flex; gap: 1rem; align-items: baseline; color: var(--ink-3); transition: color .2s; }
.steps li span { font-size: .8rem; font-weight: 600; color: var(--line-strong); letter-spacing: .06em; flex: none; }
.steps li strong { color: inherit; font-weight: 600; }
.steps li.is-active { color: var(--ink-2); }
.steps li.is-active span, .steps li.is-done span { color: var(--accent); }
.steps li.is-active strong { color: var(--ink); }
.enroll__ask { margin-top: 2rem; font-size: .92rem; color: var(--ink-3); }
.enroll__ask a { color: var(--ink-2); }

.form { display: grid; gap: 1.1rem; padding: 2rem; background: var(--bg-tint); border: 1px solid var(--line); border-radius: var(--radius); }
.form__plan { display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; }
.form__plan legend { font-size: .8rem; font-weight: 600; color: var(--ink-3); margin-bottom: .6rem; }
.radio { display: flex; align-items: center; gap: .6rem; padding: .8rem 1rem; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); background: var(--card); cursor: pointer; font-size: .92rem; font-weight: 500; }
.radio:has(input:checked) { border-color: var(--brand); box-shadow: 0 0 0 1px var(--brand); }
.radio input { accent-color: var(--brand); margin: 0; }
.field { display: grid; gap: .35rem; }
.field label { font-size: .85rem; font-weight: 500; color: var(--ink-2); }
.field input, .field textarea { font: inherit; font-size: .95rem; padding: .75rem .9rem; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); background: var(--card); color: var(--ink); width: 100%; }
.field textarea { resize: vertical; }
.field input:focus, .field textarea:focus { outline: 2px solid var(--brand); outline-offset: 1px; border-color: var(--brand); }
.field input.is-invalid { border-color: var(--bad); }
.form__error { font-size: .88rem; color: var(--bad); }
.form__privacy { font-size: .82rem; color: var(--ink-3); }
.consent { display: flex; align-items: flex-start; gap: .6rem; font-size: .82rem; line-height: 1.45; color: var(--ink-2); cursor: pointer; }
.consent input { flex: none; margin: .2rem 0 0; width: 16px; height: 16px; accent-color: var(--brand); }
.consent a { color: var(--ink); }
.section--dark .consent { color: rgba(255,255,255,.7); }
.section--dark .consent a { color: #fff; }
/* Página legal */
.legal { max-width: 720px; }
.legal h1 { font-size: clamp(1.9rem, 1.3rem + 2vw, 2.6rem); }
.legal__meta { margin-top: .75rem; font-size: .9rem; color: var(--ink-3); }
.legal h2 { font-size: 1.2rem; margin: 2.2rem 0 .6rem; }
.legal p, .legal li { color: var(--ink-2); }
.legal p + p, .legal ul + p { margin-top: .75rem; }
.legal ul { list-style: disc; padding-left: 1.25rem; display: grid; gap: .4rem; }
.legal a { color: var(--ink); }

.pay { padding: 2rem; background: var(--bg-tint); border: 1px solid var(--line); border-radius: var(--radius); display: grid; gap: 1.1rem; }
.pay__label { font-size: .78rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
.pay__summary { font-size: 1.05rem; }
.pay__alt summary { cursor: pointer; font-size: .92rem; color: var(--ink-2); font-weight: 500; }
.pay__data { display: grid; gap: .5rem; margin: 1rem 0 1.2rem; }
.pay__data > div { display: grid; grid-template-columns: 92px 1fr; gap: 1rem; align-items: baseline; }
.pay__data dt { font-size: .82rem; color: var(--ink-3); }
.pay__data dd { margin: 0; font-size: .95rem; font-weight: 600; }
.enroll__actions { display: flex; gap: .75rem; flex-wrap: wrap; }
.pay__note { font-size: .88rem; color: var(--ink-3); }
.btn.is-disabled { background: var(--line); color: var(--ink-3); border-color: var(--line); cursor: not-allowed; pointer-events: none; }

/* 10. Contacto */
.contact { display: grid; grid-template-columns: 6fr 6fr; gap: 3.5rem; align-items: center; }
.contact__media { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }
.contact__media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.contact__text h2 { margin-bottom: .5rem; }
.contact__form, .contact__done { margin-top: 1.75rem; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; }
.section--dark .form, .section--dark .pay { background: rgba(255,255,255,.04); border-color: rgba(255,255,255,.12); }
.section--dark .field input, .section--dark .field textarea { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.18); color: #fff; }
.section--dark .field label { color: rgba(255,255,255,.7); }

/* Footer */
.footer { border-top: 1px solid var(--line); padding: 2.5rem 0; }
.footer__inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-size: .9rem; color: var(--ink-2); }
.footer a { color: var(--ink); }
.footer__legal { color: var(--ink-3); }

/* Responsive */
@media (max-width: 960px) {
  .cases__head, .bio, .enroll, .personal, .contact { grid-template-columns: 1fr; gap: 2rem; }
  .cases { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .syllabus__item { grid-template-columns: 60px minmax(0, 1fr); gap: 1.25rem; }
  .syllabus__item .tools__row { grid-column: 2; }
  .plans { grid-template-columns: 1fr; }
  .details--row { grid-template-columns: repeat(2, 1fr); }
  .quiz__result { grid-template-columns: 1fr; }
  .section__head--row { flex-direction: column; align-items: flex-start; gap: 1.5rem; }
  .bio__photo { max-width: 380px; }
  .contact__media { order: 1; }
}
@media (max-width: 640px) {
  .nav__links { display: none; }
  .cases { grid-template-columns: 1fr; }
  .form__row { grid-template-columns: 1fr; }
  .slide { flex-basis: min(82vw, 340px); }
  .quiz, .quiz__capture { padding: 1.5rem; }
  .quiz__answers { flex-direction: column; }
  .form, .pay { padding: 1.4rem; }
  .form__plan { grid-template-columns: 1fr; }
  .details--row { grid-template-columns: 1fr; }
  .pay__data > div { grid-template-columns: 1fr; gap: .1rem; }
  .footer__inner { flex-direction: column; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .cat__bar i, .quiz__progress span { transition: none; }
}