/* Louis Pasteur · landing de una pagina (propuesta). Tema claro, azul y dorado de su marca. */
:root {
  --paper: #f5f7fc;
  --white: #ffffff;
  --navy: #0b1b4f;
  --blue: #1746d1;
  --blue-soft: #e6ecff;
  --gold: #f4b019;
  --pink: #d93a7c;
  --pink-soft: #fde8f1;
  --ink: #0b1b4f;
  --dim: #46527a;
  --line: rgba(11, 27, 79, .13);
  --serif: "Fraunces", Georgia, serif;
  --sans: "DM Sans", system-ui, sans-serif;
  --ease: cubic-bezier(.2, .9, .25, 1);
  --pad: clamp(20px, 5vw, 72px);
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 16px/1.65 var(--sans); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { display: block; max-width: 100%; }
figure { margin: 0; }
a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; }
main { position: relative; }
.wrap { max-width: 78rem; margin: 0 auto; padding-inline: var(--pad); }
.eyebrow { margin: 0; font: 600 12px/1.2 var(--sans); letter-spacing: .16em; text-transform: uppercase; color: var(--blue); }
.h { margin: 0; font-family: var(--serif); font-weight: 500; letter-spacing: -.025em; line-height: 1.04; }
.h em { font-style: italic; font-weight: 400; color: var(--blue); }
.p { margin: 0; color: var(--dim); max-width: 58ch; font-size: clamp(15.5px, 1.15vw, 17.5px); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 52px; padding: 0 26px; border-radius: 999px; font: 600 15px/1 var(--sans); border: 1.5px solid var(--navy); color: var(--navy); background: transparent; transition: background .3s var(--ease), color .3s var(--ease), border-color .3s var(--ease), transform .3s var(--ease); }
.btn:hover { background: var(--navy); color: var(--white); }
.btn:active { transform: scale(.98); }
.btn.is-primary { background: var(--blue); border-color: var(--blue); color: var(--white); }
.btn.is-primary:hover { background: var(--navy); border-color: var(--navy); }
.btn svg { width: 19px; height: 19px; }

/* barra */
.bar { position: fixed; inset: 0 0 auto 0; z-index: 40; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 14px var(--pad); background: rgba(245, 247, 252, 0); border-bottom: 1px solid transparent; transition: background .4s var(--ease), border-color .4s var(--ease); }
.bar.is-stuck { background: rgba(245, 247, 252, .9); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); border-color: var(--line); }
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { width: 46px; height: 46px; border-radius: 50%; }
.brand span { display: grid; line-height: 1.05; }
.brand small { font: 600 9.5px/1.3 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: var(--dim); }
.brand b { font: 600 19px/1 var(--serif); letter-spacing: .01em; }
.bar nav { display: none; gap: clamp(18px, 2.4vw, 36px); }
.bar nav a { padding-block: 14px; font: 500 15px/1 var(--sans); color: var(--dim); transition: color .2s; }
.bar nav a:hover { color: var(--blue); }
.bar .btn { min-height: 46px; padding: 0 20px; font-size: 14px; }
@media (min-width: 900px) { .bar nav { display: flex; } }
#sentinel { position: absolute; top: 40px; left: 0; width: 1px; height: 1px; }

/* portada */
.hero { padding: clamp(120px, 17vh, 170px) 0 clamp(60px, 9vh, 110px); position: relative; }
.hero::before { content: ""; position: absolute; inset: 0 0 auto auto; width: min(58vw, 820px); height: 100%; background: radial-gradient(60% 55% at 70% 35%, #dfe7ff 0%, rgba(223, 231, 255, 0) 70%); pointer-events: none; }
.hero-grid { position: relative; display: grid; gap: clamp(40px, 6vw, 80px); align-items: center; }
.hero h1 { font-size: clamp(44px, 6.4vw, 96px); margin: 22px 0 26px; }
.hero h1 span { display: block; overflow: hidden; padding: .04em 0 .16em; margin-bottom: -.12em; }
.hero h1 span > i { display: block; font-style: inherit; animation: rise .8s var(--ease) both; }
.hero h1 span:nth-child(2) > i { animation-delay: .09s; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin: 34px 0 0; padding: 0; list-style: none; }
.chips li { display: inline-flex; align-items: center; gap: 9px; padding: 9px 16px; border-radius: 999px; background: var(--white); border: 1px solid var(--line); font: 500 14px/1.2 var(--sans); }
.chips li::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--gold); }
.late { animation: fade .6s .3s var(--ease) both; }
.stack { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; align-items: start; }
.tile { position: relative; overflow: hidden; border-radius: 22px; aspect-ratio: 4 / 5; background: var(--blue-soft); animation: tile .9s var(--ease) both; }
.tile:nth-child(1) { margin-top: 13%; animation-delay: .1s; }
.tile:nth-child(2) { animation-delay: .2s; }
.tile:nth-child(3) { margin-top: 24%; animation-delay: .3s; }
.tile img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 100%; }
.tile figcaption { position: absolute; left: 10px; bottom: 10px; padding: 7px 12px; border-radius: 999px; background: rgba(255, 255, 255, .94); font: 600 12px/1 var(--sans); }
@media (min-width: 900px) { .hero-grid { grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); } }
@keyframes rise { from { transform: translateY(105%); } to { transform: none; } }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes tile { from { opacity: 0; transform: translateY(34px); } to { opacity: 1; transform: none; } }

/* cursos */
.courses { padding: clamp(70px, 11vh, 130px) 0; background: var(--white); border-block: 1px solid var(--line); }
.courses-head { display: grid; gap: 22px; align-items: end; margin-bottom: clamp(40px, 6vh, 70px); }
.courses-head .h { font-size: clamp(34px, 4.6vw, 64px); margin-top: 16px; }
@media (min-width: 900px) { .courses-head { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); } }
.tracks { display: grid; gap: clamp(40px, 5vw, 64px); }
@media (min-width: 980px) { .tracks { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }
.track-top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 20px; border-radius: 18px; background: var(--blue-soft); }
.track.is-pink .track-top { background: var(--pink-soft); }
.track-top h3 { margin: 0; font: 500 clamp(26px, 2.6vw, 36px)/1 var(--serif); letter-spacing: -.02em; }
.track-top span { font: 600 12px/1 var(--sans); letter-spacing: .12em; text-transform: uppercase; color: var(--blue); }
.track.is-pink .track-top span { color: var(--pink); }
.rows { list-style: none; margin: 8px 0 0; padding: 0; }
.rows a { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4px 18px; align-items: center; padding: 18px 6px; border-bottom: 1px solid var(--line); transition: padding .35s var(--ease), background .35s var(--ease); border-radius: 12px; }
.rows a:hover { padding-inline: 16px; background: var(--paper); }
.rows b { font: 600 clamp(16.5px, 1.35vw, 19px)/1.25 var(--sans); }
.rows small { grid-column: 1; color: var(--dim); font-size: 14.5px; }
.rows .dur { grid-row: 1 / span 2; grid-column: 2; font: 500 clamp(20px, 1.8vw, 26px)/1 var(--serif); font-variant-numeric: tabular-nums; white-space: nowrap; text-align: right; }
.rows .dur i { display: block; font: 500 11.5px/1.5 var(--sans); letter-spacing: .1em; text-transform: uppercase; color: var(--dim); font-style: normal; }
.tag { display: inline-block; margin-left: 8px; padding: 3px 9px; border-radius: 999px; font: 600 11px/1.4 var(--sans); letter-spacing: .06em; text-transform: uppercase; vertical-align: 2px; background: var(--gold); color: #3a2a00; }
.tag.is-soft { background: var(--blue-soft); color: var(--blue); }

/* destacados */
.feat { padding: clamp(70px, 11vh, 130px) 0; }
.feat .h { font-size: clamp(34px, 4.6vw, 64px); margin: 16px 0 clamp(36px, 6vh, 60px); }
.cards { display: grid; gap: 16px; }
@media (min-width: 700px) { .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1100px) { .cards { grid-template-columns: 7fr 5fr 5fr 7fr; } }
.card { display: flex; flex-direction: column; border-radius: 24px; overflow: hidden; background: var(--white); border: 1px solid var(--line); transition: transform .5s var(--ease), border-color .3s; }
.card:hover { transform: translateY(-6px); border-color: var(--blue); }
.card .ph { aspect-ratio: 4 / 5; overflow: hidden; background: var(--blue-soft); }
.card .ph img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s var(--ease); }
.card:hover .ph img { transform: scale(1.05); }
.card .tx { padding: 22px 22px 24px; display: grid; gap: 12px; flex: 1; align-content: start; }
.card h3 { margin: 0; font: 500 clamp(23px, 2vw, 28px)/1.12 var(--serif); letter-spacing: -.02em; }
.card ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 7px; color: var(--dim); font-size: 14.5px; }
.card li { padding-left: 18px; position: relative; }
.card li::before { content: ""; position: absolute; left: 0; top: .62em; width: 7px; height: 7px; border-radius: 50%; background: var(--blue); }
.card.is-pink li::before { background: var(--pink); }
.card .meta { margin-top: auto; padding-top: 14px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 12px; font: 600 14px/1.3 var(--sans); }
.card .meta span:last-child { color: var(--blue); }
.card.is-pink .meta span:last-child { color: var(--pink); }

/* asi se aprende */
.live { padding: clamp(70px, 11vh, 130px) 0; background: var(--navy); color: var(--white); }
.live .eyebrow { color: var(--gold); }
.live .h { font-size: clamp(34px, 4.6vw, 64px); margin: 16px 0 18px; }
.live .h em { color: var(--gold); }
.live .p { color: rgba(255, 255, 255, .78); }
.rail { display: flex; gap: 14px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; padding: clamp(34px, 6vh, 56px) var(--pad) 0; scroll-padding-inline: var(--pad); }
.rail::-webkit-scrollbar { display: none; }
.rail figure { margin: 0; flex: 0 0 auto; width: min(78vw, 400px); aspect-ratio: 3 / 2; border-radius: 22px; overflow: hidden; scroll-snap-align: start; background: #16286a; }
.rail img { width: 100%; height: 100%; object-fit: cover; }

/* sede */
.place { padding: clamp(70px, 11vh, 130px) 0; }
.place-grid { display: grid; gap: clamp(30px, 5vw, 70px); align-items: start; }
.place .h { font-size: clamp(34px, 4.6vw, 64px); margin: 16px 0 22px; }
.info { margin: 0; display: grid; gap: 0; border-top: 1px solid var(--line); }
.info div { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.info dt { font: 600 12px/1.6 var(--sans); letter-spacing: .12em; text-transform: uppercase; color: var(--dim); }
.info dd { margin: 0; font: 500 17px/1.45 var(--sans); overflow-wrap: anywhere; }
.info a { border-bottom: 1.5px solid var(--blue-soft); transition: border-color .25s, color .25s; }
.info a:hover { color: var(--blue); border-color: var(--blue); }
@media (min-width: 900px) { .place-grid { grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); } }

/* cierre */
.end { margin: 0 var(--pad) clamp(40px, 6vh, 70px); padding: clamp(50px, 9vh, 100px) clamp(24px, 5vw, 80px); border-radius: 32px; background: var(--blue); color: var(--white); display: grid; gap: 30px; align-items: center; position: relative; overflow: hidden; }
.end::after { content: ""; position: absolute; right: -120px; top: -120px; width: 380px; height: 380px; border-radius: 50%; border: 60px solid rgba(255, 255, 255, .08); }
.end .h { font-size: clamp(38px, 5.6vw, 84px); position: relative; z-index: 1; }
.end .h em { color: var(--gold); }
.end .btn { position: relative; z-index: 1; background: var(--white); border-color: var(--white); color: var(--navy); justify-self: start; }
.end .btn:hover { background: var(--gold); border-color: var(--gold); color: #2b1f00; }
@media (min-width: 900px) { .end { grid-template-columns: minmax(0, 1fr) auto; } }

.foot { padding: 28px var(--pad) 96px; display: flex; flex-wrap: wrap; gap: 14px 40px; justify-content: space-between; color: var(--dim); font-size: 13px; }
.foot p { margin: 0; max-width: 62ch; }

.wa { position: fixed; right: 18px; bottom: 18px; z-index: 50; width: 58px; height: 58px; border-radius: 50%; display: grid; place-items: center; background: #1fa855; color: #fff; box-shadow: 0 0 0 4px rgba(255, 255, 255, .9); transition: transform .35s var(--ease); }
.wa:hover { transform: translateY(-4px); }
.wa svg { width: 28px; height: 28px; }

.rv { opacity: 0; transform: translateY(18px); transition: opacity .45s var(--ease), transform .5s var(--ease); transition-delay: calc(var(--i, 0) * 70ms); }
.rv.in { opacity: 1; transform: none; }
@media (max-width: 420px) { .btn { min-height: 50px; padding: 0 20px; } }
@media (prefers-reduced-motion: reduce) {
  .rv, .late, .tile, .hero h1 span > i { opacity: 1 !important; transform: none !important; animation: none !important; transition: none !important; }
  .card, .card .ph img, .btn, .wa, .rows a { transition: none !important; }
}