/* ==========================================================================
   Trainer Chile — landing v1
   Paleta: tema claro sobre blanco, azul del logo y un rojo "pulso" reservado
   para la urgencia.
   Tipografía: Archivo (display/UI) · Source Serif 4 (lectura) · IBM Plex Mono (datos)
   ========================================================================== */

:root {
  /* Tema claro único. El logo de la OTEC viene sobre fondo blanco, así que la
     página se ancla en blanco y no ofrece variante oscura: en fondo oscuro el
     logo queda encajonado en su propio recuadro y se ve pegado. */
  --ground:      #FFFFFF;
  --surface:     #FFFFFF;
  --surface-2:   #EEF3F8;  /* bandas alternadas */
  --surface-3:   #F7FAFC;  /* tinte muy suave */
  --ink:         #12212C;
  --ink-soft:    #3E5162;
  --muted:       #566B7C;  /* 5.5:1 sobre blanco, 4.9:1 sobre la banda tintada */
  --line:        #DCE4EB;
  --line-strong: #B9C7D3;
  --brand:       #1268B8;
  --brand-soft:  #E5EFF9;
  --deep:        #0C3E68;
  --pulse:       #C33B2A;
  --footer:      #EEF3F8;
  --on-footer:   #3E5162;

  --hd: 'Archivo', 'Helvetica Neue', Arial, sans-serif;
  --bd: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --mn: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --wrap: 1180px;
  --r: 3px;
}

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

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--bd);
  font-size: 17px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--deep); }

.wrap { width: min(100% - 2.5rem, var(--wrap)); margin-inline: auto; }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 99;
  background: var(--ink); color: var(--ground); padding: .6rem 1rem; font-family: var(--hd);
}
.skip:focus { left: 0; }

:where(a, button, input, select, textarea):focus-visible {
  outline: 2px solid var(--pulse);
  outline-offset: 2px;
}

/* ── barra superior ───────────────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--ground) 90%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar__in { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; min-height: 72px; }
.brand { display: block; line-height: 0; }
.brand img { width: 140px; height: auto; }

.nav { display: flex; align-items: center; gap: 1.6rem; font-family: var(--hd); font-size: .82rem; letter-spacing: .04em; text-transform: uppercase; }
.nav a { color: var(--ink-soft); text-decoration: none; padding-block: .35rem; border-bottom: 2px solid transparent; }
.nav a:hover { color: var(--ink); border-bottom-color: var(--brand); }
.nav__cta { color: var(--surface) !important; background: var(--deep); padding: .55rem 1rem !important; border: 0 !important; border-radius: var(--r); }
.nav__cta:hover { background: var(--pulse); }
@media (max-width: 780px) { .nav a:not(.nav__cta) { display: none; } }

/* ── tipografía compartida ────────────────────────────────── */
.eyebrow {
  font-family: var(--mn); font-size: .74rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--brand); margin: 0 0 .9rem;
}
h1, h2, h3 { font-family: var(--hd); font-weight: 700; letter-spacing: -.015em; text-wrap: balance; margin: 0; }
h1 { font-size: clamp(2.3rem, 5.2vw, 3.65rem); line-height: 1.05; }
h1 em { font-style: normal; color: var(--pulse); }
h2 { font-size: clamp(1.75rem, 3.2vw, 2.4rem); line-height: 1.12; }
h3 { font-size: 1.12rem; line-height: 1.3; }

.shead { max-width: 62ch; margin-bottom: 2.8rem; }
.shead__note { color: var(--ink-soft); margin: 1rem 0 0; }
.src { display: block; font-family: var(--mn); font-size: .74rem; color: var(--muted); margin-top: .8rem; letter-spacing: .01em; }

/* ── hero ─────────────────────────────────────────────────── */
.hero { padding-top: clamp(2.5rem, 6vw, 4.5rem); background: var(--surface); }
.hero__grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(2rem, 5vw, 4rem); align-items: start; }
@media (max-width: 900px) { .hero__grid { grid-template-columns: 1fr; } }

.lede { font-size: 1.12rem; color: var(--ink-soft); max-width: 46ch; margin: 1.4rem 0 0; }

.hero__actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }
.btn {
  font-family: var(--hd); font-size: .9rem; font-weight: 600; letter-spacing: .02em;
  padding: .85rem 1.5rem; border-radius: var(--r); text-decoration: none; border: 1px solid transparent;
  display: inline-block; cursor: pointer;
}
.btn--pulse { background: var(--pulse); color: #fff; }
.btn--pulse:hover { background: color-mix(in srgb, var(--pulse) 80%, #000); }
.btn--ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.btn--ghost:hover { border-color: var(--brand); color: var(--brand); }

.creds { list-style: none; padding: 0; margin: 2.8rem 0 0; display: grid; gap: 0; border-top: 1px solid var(--line); }
.creds li { display: grid; grid-template-columns: 8.5rem auto; gap: .2rem 1rem; padding: .85rem 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.creds__k { font-family: var(--mn); font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.creds__v { font-family: var(--hd); font-weight: 600; font-size: 1.02rem; }
.creds__n { grid-column: 2; font-size: .88rem; color: var(--muted); }

.hero__media { margin: 0; }
.hero__media img { width: 100%; border-radius: var(--r); }
.hero__media figcaption,
.wide figcaption,
.gallery figcaption {
  font-family: var(--mn); font-size: .74rem; color: var(--muted); margin-top: .7rem; letter-spacing: .01em;
}

/* trazo ECG que cierra el hero */
.ecg { margin-top: clamp(2.5rem, 5vw, 4rem); line-height: 0; }
.ecg svg { width: 100%; height: 56px; display: block; }
.ecg svg path { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.ecg__base { stroke: var(--line-strong); }
.ecg__pulse { stroke: var(--pulse); stroke-dasharray: 0 1400; }
@media (prefers-reduced-motion: no-preference) {
  .ecg__pulse { stroke-dasharray: 150 1400; stroke-dashoffset: 150; animation: sweep 5s linear infinite; }
  @keyframes sweep { to { stroke-dashoffset: -1400; } }
}

/* ── bandas ───────────────────────────────────────────────── */
.band { padding-block: clamp(3.5rem, 7vw, 6rem); }
.band--tint { background: var(--surface-3); border-block: 1px solid var(--line); }
.band--dark { background: var(--surface-2); border-block: 1px solid var(--line); }

/* ── cursos ───────────────────────────────────────────────── */
.courses { list-style: none; padding: 0; margin: 0; border-top: 2px solid var(--ink); }
.course {
  display: grid; grid-template-columns: 20rem minmax(0, 1fr);
  gap: 1rem 3rem; padding: 2rem 0; border-bottom: 1px solid var(--line);
}
@media (max-width: 820px) { .course { grid-template-columns: 1fr; gap: 1rem; } }
.course--lead .course__head h3 { font-size: 1.5rem; }
.course--lead { background: linear-gradient(90deg, var(--brand-soft), transparent 55%); }
.course--lead .course__head, .course--lead .course__body, .course--lead .meta { padding-left: 1.25rem; }
@media (max-width: 820px) { .course--lead .course__head, .course--lead .course__body, .course--lead .meta { padding-left: .9rem; } }
.course__head { grid-row: span 2; }
@media (max-width: 820px) { .course__head { grid-row: auto; } }
.course__sub { color: var(--muted); font-size: .95rem; margin: .5rem 0 0; }
.course__body { margin: 0; color: var(--ink-soft); max-width: 62ch; }

.meta { display: flex; flex-wrap: wrap; gap: 0 2.2rem; margin: 0 0 1rem; }
.meta div { margin: 0; }
.meta dt { font-family: var(--mn); font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.meta dd { font-family: var(--hd); font-weight: 600; font-size: .95rem; margin: .15rem 0 0; font-variant-numeric: tabular-nums; }

/* ── cadena de sobrevida ──────────────────────────────────── */
.chain { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 1.5rem; }
@media (max-width: 980px) { .chain { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .chain { grid-template-columns: 1fr; } }
.chain li { padding-top: 1rem; border-top: 2px solid var(--pulse); }
.chain li:nth-child(n+4) { border-top-color: var(--line); }
.chain__n { font-family: var(--mn); font-size: .78rem; color: var(--muted); display: block; margin-bottom: .5rem; }
.chain p { font-size: .95rem; color: var(--ink-soft); margin: .5rem 0 0; }

.wide { margin: 3rem 0 0; }
.wide img { width: 100%; border-radius: var(--r); }

/* ── proceso ──────────────────────────────────────────────── */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px) { .steps { grid-template-columns: 1fr; } }
.steps__n { font-family: var(--mn); font-size: .8rem; color: var(--brand); display: block; margin-bottom: .6rem; font-variant-numeric: tabular-nums; }
.steps li { border-left: 1px solid var(--line); padding-left: 1.25rem; }
.steps p { font-size: .95rem; color: var(--ink-soft); margin: .5rem 0 0; }

/* ── cobertura ────────────────────────────────────────────── */
.cover__grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: clamp(2rem, 5vw, 4rem); align-items: start; }
@media (max-width: 900px) { .cover__grid { grid-template-columns: 1fr; } }
.cities { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: .5rem; }
.cities li {
  font-family: var(--mn); font-size: .82rem; letter-spacing: .02em;
  border: 1px solid var(--line); border-radius: var(--r); padding: .4rem .75rem; color: var(--ink-soft);
}

.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
@media (max-width: 620px) { .gallery { grid-template-columns: repeat(2, 1fr); } }
.gallery figure { margin: 0; }
.gallery img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: var(--r); }

/* ── clientes ─────────────────────────────────────────────── */
.clients { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2.5rem; }
@media (max-width: 860px) { .clients { grid-template-columns: 1fr; gap: 2rem; } }
.clients__col h3 { font-size: .78rem; font-family: var(--mn); font-weight: 500; letter-spacing: .12em; text-transform: uppercase; color: var(--brand); padding-bottom: .7rem; border-bottom: 1px solid var(--line); }
.clients ul { list-style: none; padding: 0; margin: 1rem 0 0; display: grid; gap: .7rem; }
.clients li { font-size: .95rem; color: var(--ink-soft); }

/* ── contacto ─────────────────────────────────────────────── */
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 4.5rem); align-items: start; }
@media (max-width: 860px) { .contact__grid { grid-template-columns: 1fr; } }

.contactdata { margin: 0; display: grid; gap: 0; border-top: 1px solid var(--line); }
.contactdata div { display: grid; grid-template-columns: 9rem 1fr; gap: 1rem; padding: .8rem 0; border-bottom: 1px solid var(--line); }
@media (max-width: 480px) { .contactdata div { grid-template-columns: 1fr; gap: .2rem; } }
.contactdata dt { font-family: var(--mn); font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); padding-top: .2rem; }
.contactdata dd { margin: 0; font-family: var(--hd); font-size: .98rem; font-weight: 500; }

.form { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; background: var(--surface); border: 1px solid var(--line-strong); border-radius: var(--r); padding: clamp(1.25rem, 3vw, 2rem); }
.field { grid-column: 1 / -1; display: grid; gap: .35rem; }
.field--half { grid-column: span 1; }
@media (max-width: 480px) { .field--half { grid-column: 1 / -1; } }
.form label { font-family: var(--mn); font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.opt { text-transform: none; letter-spacing: 0; }
.form input, .form select, .form textarea {
  font: inherit; font-size: .98rem; font-family: var(--hd);
  color: var(--ink); background: var(--surface-3);
  border: 1px solid var(--line-strong); border-radius: var(--r); padding: .65rem .8rem; width: 100%;
}
.form textarea { resize: vertical; }
.form .btn { grid-column: 1 / -1; justify-self: start; }
.form__note { grid-column: 1 / -1; margin: 0; font-size: .85rem; color: var(--muted); }
.form__status {
  grid-column: 1 / -1; margin: 0; font-family: var(--hd); font-size: .92rem; font-weight: 500;
  border-left: 3px solid var(--brand); padding: .55rem .85rem; background: var(--brand-soft);
  border-radius: 0 var(--r) var(--r) 0;
}
.form__status--error { border-left-color: var(--pulse); background: color-mix(in srgb, var(--pulse) 12%, transparent); }
.form button[disabled] { opacity: .6; cursor: progress; }

/* Campo trampa para bots: fuera de la vista, fuera del foco, fuera del flujo. */
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* ── pie ──────────────────────────────────────────────────── */
.foot { background: var(--footer); color: var(--on-footer); padding-block: 3rem; border-top: 1px solid var(--line); }
.foot__in { display: grid; gap: 1rem; justify-items: start; }
.foot__in img { width: 140px; }
.foot__legal { margin: 0; font-size: .88rem; max-width: 70ch; color: var(--on-footer); }
.foot__legal--dim { font-family: var(--mn); font-size: .74rem; color: var(--muted); }