/* Paleta tomada del logo Tesis Gold: negro, dorado, blanco y celeste (IA) */
:root {
  --bg: #0b0b0c;
  --bg-alt: #121214;
  --surface: #17171a;
  --surface-2: #1e1e22;
  --text: #f5f3ee;
  --muted: #b7b1a3;
  --border: #2c2a25;
  --gold: #d4a63a;
  --gold-light: #f6d77a;
  --gold-dark: #a8791f;
  --gold-grad: linear-gradient(135deg, #f6d77a 0%, #d4a63a 45%, #a8791f 100%);
  --cyan: #22b5e8;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(0,0,0,.45);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 400 17px/1.7 Inter, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3 { font-family: Montserrat, Inter, sans-serif; line-height: 1.2; margin: 0 0 .6em; }
h1 { font-size: clamp(2.1rem, 5vw, 3.5rem); font-weight: 800; letter-spacing: -.01em; }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); font-weight: 800; }
h3 { font-size: 1.08rem; font-weight: 700; }
p { margin: 0 0 1em; }
a { color: var(--gold-light); }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }

.gold-text { background: var(--gold-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

.container { width: min(1140px, 100% - 32px); margin-inline: auto; }
.narrow { width: min(780px, 100% - 32px); }
.section { padding: 96px 0; }
.section--alt { background: var(--bg-alt); border-block: 1px solid var(--border); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  text-transform: uppercase; letter-spacing: .22em; font-size: .78rem; font-weight: 600; color: var(--gold);
}
.eyebrow::before, .eyebrow::after { content: ""; width: 18px; height: 1px; background: var(--gold); }
.eyebrow::after { width: 4px; height: 4px; border-radius: 50%; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 720px; }

/* Nav */
.nav { position: sticky; top: 0; z-index: 10; background: rgba(11,11,12,.85); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: Montserrat, sans-serif; font-weight: 800; font-size: 1.15rem; letter-spacing: .02em; color: var(--text); text-decoration: none; }
.brand img { width: 40px; height: 40px; border-radius: 50%; }
.brand b { background: var(--gold-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav__menu { display: flex; align-items: center; gap: 26px; }
.nav__menu a { color: var(--muted); text-decoration: none; font-size: .95rem; font-weight: 500; }
.nav__menu a:hover { color: var(--gold-light); }
.nav__toggle { display: none; background: none; border: 1px solid var(--border); color: var(--gold); border-radius: 10px; width: 40px; height: 40px; cursor: pointer; font-size: 1.1rem; }

@media (max-width: 880px) {
  .nav__toggle { display: block; }
  .nav__menu { position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; align-items: flex-start; gap: 0; padding: 8px 16px 20px; background: var(--bg); border-bottom: 1px solid var(--border); display: none; }
  .nav__menu.open { display: flex; }
  .nav__menu a { padding: 12px 0; width: 100%; }
  .nav__menu .btn--primary { margin-top: 8px; width: auto; padding: 10px 20px; }
}

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 13px 24px; border-radius: 999px; border: 1px solid var(--gold); background: transparent; color: var(--gold-light); font: 600 .95rem Inter, sans-serif; text-decoration: none; cursor: pointer; transition: transform .15s, box-shadow .15s, background .15s; }
.btn:hover { transform: translateY(-1px); background: rgba(212,166,58,.08); }
.btn--primary { background: var(--gold-grad); border-color: transparent; color: #141009; }
.btn--primary:hover { background: var(--gold-grad); box-shadow: 0 6px 24px rgba(212,166,58,.35); }
.nav__menu a.btn--primary { color: #141009; }
.btn--small { padding: 8px 18px; font-size: .88rem; }
.btn--block { width: 100%; }

/* Hero */
.hero { position: relative; overflow: hidden; padding: 80px 0 64px; background:
  radial-gradient(700px 420px at 78% 40%, rgba(212,166,58,.16), transparent 70%),
  radial-gradient(500px 300px at 10% 0%, rgba(34,181,232,.06), transparent 70%); }
.hero__grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 56px; align-items: center; }
.hero__logo { position: relative; justify-self: center; width: min(420px, 100%); }
.hero__logo::before { content: ""; position: absolute; inset: 8%; border-radius: 50%; box-shadow: 0 0 120px 20px rgba(212,166,58,.25); }
.hero__logo img { position: relative; border-radius: 50%; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 8px; }
.trust { list-style: none; padding: 0; margin: 36px 0 0; display: flex; flex-wrap: wrap; gap: 20px 32px; color: var(--muted); font-size: .88rem; }
.trust li { max-width: 180px; line-height: 1.4; }
.trust strong { display: block; margin-bottom: 4px; font-family: Montserrat, sans-serif; font-size: 1.8rem; font-weight: 800; color: var(--gold); }

.announce { margin-top: 56px; display: flex; align-items: center; gap: 18px; flex-wrap: wrap; padding: 16px 22px; border: 1px solid var(--gold-dark); border-radius: var(--radius); background: linear-gradient(90deg, rgba(212,166,58,.14), rgba(212,166,58,.03)); color: var(--text); text-decoration: none; }
.announce:hover { border-color: var(--gold); }
.announce__tag { background: var(--gold-grad); color: #141009; font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; padding: 4px 10px; border-radius: 999px; }
.announce__text { flex: 1; min-width: 220px; color: var(--muted); font-size: .95rem; }
.announce__text strong { color: var(--text); }
.announce__cta { color: var(--gold-light); font-weight: 600; }

/* Cards */
.grid { display: grid; gap: 20px; margin-top: 12px; }
.grid--services { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.card { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; transition: border-color .2s, transform .2s; }
.card:hover { border-color: var(--gold-dark); transform: translateY(-3px); }
.card h3 { margin-bottom: .45em; }
.card p { color: var(--muted); font-size: .94rem; margin: 0; }
.card__icon { display: grid; place-items: center; width: 48px; height: 48px; margin-bottom: 16px; border-radius: 50%; border: 1px solid var(--gold-dark); background: rgba(212,166,58,.08); font-size: 1.35rem; }
.card__icon--ia { font-family: Montserrat, sans-serif; font-weight: 800; font-size: 1rem; color: var(--cyan); border-color: var(--gold); }
.card--featured { border-color: var(--gold); background: linear-gradient(160deg, rgba(212,166,58,.12), var(--surface) 55%); }
.card__badge { position: absolute; top: 18px; right: 18px; background: var(--gold-grad); color: #141009; font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; padding: 3px 10px; border-radius: 999px; }
.card__tag { display: inline-block; font-size: .75rem; text-transform: uppercase; letter-spacing: .12em; font-weight: 600; color: var(--gold); margin-bottom: 10px; }

/* Steps */
.steps { list-style: none; padding: 0; margin: 12px 0 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 20px; counter-reset: s; }
.steps li { counter-increment: s; position: relative; padding: 64px 22px 22px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.steps li::before { content: counter(s, decimal-leading-zero); position: absolute; top: 18px; left: 22px; font-family: Montserrat, sans-serif; font-weight: 800; font-size: 1.6rem; background: var(--gold-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.steps p { margin: 0; color: var(--muted); font-size: .94rem; }

/* Full Day */
.fullday { display: grid; grid-template-columns: 1.5fr 1fr; gap: 32px; margin-top: 32px; align-items: start; }
.agenda { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; }
.agenda__hours { display: block; margin-top: 4px; font-family: Inter, sans-serif; font-size: .9rem; font-weight: 500; color: var(--gold); }
.timeline { list-style: none; padding: 0; margin: 0; }
.timeline li { display: grid; grid-template-columns: 64px 1fr; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--border); }
.timeline li:last-child { border-bottom: 0; }
.timeline time { font-weight: 700; color: var(--gold); font-variant-numeric: tabular-nums; }
.timeline span { display: block; color: var(--muted); font-size: .9rem; }
.ticket { position: sticky; top: 92px; background: var(--surface); border: 1px solid var(--gold); border-radius: var(--radius); padding: 28px; box-shadow: 0 0 0 4px rgba(212,166,58,.08), var(--shadow); }
.ticket__price { font-family: Montserrat, sans-serif; font-size: 2.6rem; font-weight: 800; margin: 0; }
.ticket__price { background: var(--gold-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.ticket__price small { font-family: Inter, sans-serif; font-size: .9rem; font-weight: 500; color: var(--muted); -webkit-text-fill-color: var(--muted); }
.ticket__note, .ticket__info { color: var(--muted); font-size: .9rem; }

/* Checklist */
.checklist { list-style: none; padding: 0; margin: 20px 0; }
.checklist li { position: relative; padding: 0 0 10px 32px; font-size: .95rem; }
.checklist li::before { content: "✓"; position: absolute; left: 0; top: 2px; width: 22px; height: 22px; display: grid; place-items: center; border-radius: 50%; background: rgba(212,166,58,.15); color: var(--gold); font-size: .78rem; font-weight: 700; }

/* Features */
.feature { border-top: 2px solid var(--gold); padding-top: 18px; }
.feature p { color: var(--muted); font-size: .94rem; margin: 0; }

/* FAQ */
.faq { border-bottom: 1px solid var(--border); padding: 18px 0; }
.faq summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--gold); font-size: 1.4rem; line-height: 1; }
.faq[open] summary::after { content: "–"; }
.faq p { color: var(--muted); margin: 12px 0 0; }

/* Contacto */
.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact__list { list-style: none; padding: 0; margin: 24px 0; display: grid; gap: 10px; }
.social { display: flex; gap: 18px; flex-wrap: wrap; }
.form { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; display: grid; gap: 16px; }
.form label { display: grid; gap: 6px; font-size: .9rem; font-weight: 500; color: var(--muted); }
.form input, .form select, .form textarea { font: inherit; font-size: 1rem; padding: 11px 13px; border-radius: 10px; border: 1px solid var(--border); background: var(--bg); color: var(--text); }
.form input:focus, .form select:focus, .form textarea:focus { outline: 2px solid var(--gold); border-color: transparent; }

/* Footer */
.footer { border-top: 1px solid var(--border); padding: 28px 0; color: var(--muted); font-size: .9rem; }
.footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.footer p { margin: 0; }

.wa-float { position: fixed; right: 20px; bottom: 20px; z-index: 20; width: 56px; height: 56px; border-radius: 50%; display: grid; place-items: center; background: #25d366; color: #fff; box-shadow: 0 6px 20px rgba(0,0,0,.4); }

@media (max-width: 880px) {
  .hero__grid, .fullday, .contact { grid-template-columns: 1fr; }
  .hero__logo { order: -1; width: min(240px, 70%); }
  .ticket { position: static; }
}
@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .hero { padding: 40px 0 48px; }
  .announce__cta { width: 100%; }
  .eyebrow { letter-spacing: .14em; font-size: .72rem; }
}

/* Reveal */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s, transform .6s; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { transition: none; opacity: 1; transform: none; }
}

/* Asesor */
.advisor { display: grid; grid-template-columns: minmax(260px, 400px) 1fr; gap: 56px; align-items: center; }
.advisor__photo { position: relative; margin: 0; aspect-ratio: 4 / 5; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--gold); background: radial-gradient(circle at 50% 35%, rgba(212,166,58,.18), var(--surface) 70%); box-shadow: 0 0 0 6px rgba(212,166,58,.08), var(--shadow); display: grid; place-items: center; }
.advisor__photo img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.advisor__placeholder { color: var(--muted); font-size: .9rem; letter-spacing: .1em; text-transform: uppercase; }
.advisor__role { font-size: 1.1rem; font-weight: 600; margin-top: -.3em; background: var(--gold-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.credentials { list-style: none; padding: 0; margin: 24px 0 28px; display: grid; gap: 16px; }
.credentials > li { display: grid; grid-template-columns: 44px 1fr; gap: 14px; align-items: start; }
.credentials__icon { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--gold-dark); background: rgba(212,166,58,.08); font-size: 1.15rem; }
.credentials strong { display: block; }
.credentials span { color: var(--muted); font-size: .94rem; }
.indexes { list-style: none; padding: 0; margin: 10px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.indexes li { font-size: .82rem; font-weight: 600; color: var(--gold-light); border: 1px solid var(--gold-dark); background: rgba(212,166,58,.08); padding: 4px 12px; border-radius: 999px; }
@media (max-width: 880px) {
  .advisor { grid-template-columns: 1fr; gap: 32px; }
  .advisor__photo { width: min(320px, 100%); justify-self: center; }
}
.btn { text-align: center; }

/* Áreas académicas */
.areas { list-style: none; padding: 0; margin: 28px 0 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 880px) { .areas { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; } .area { padding: 12px 14px; gap: 10px; font-size: .92rem; } .area__icon { width: 38px; height: 38px; font-size: 1rem; } }
@media (max-width: 560px) { .areas { grid-template-columns: 1fr; } }
.area { min-width: 0; display: flex; align-items: center; gap: 14px; padding: 16px 20px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); font-family: Montserrat, sans-serif; font-weight: 700; transition: border-color .2s, transform .2s; }
.area:hover { border-color: var(--gold); transform: translateY(-2px); }
.area__icon { display: grid; place-items: center; flex: none; width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--gold-dark); background: rgba(212,166,58,.08); font-size: 1.2rem; }
.areas__note { margin-top: 24px; color: var(--muted); }
@media (max-width: 880px) { .nav__menu { max-height: calc(100vh - 68px); overflow-y: auto; } }