/* ===== Tokens ===== */
:root {
  --azul: #154E80;
  --azul-oscuro: #0c3050;
  --amarillo: #F1BE2C;
  --blanco: #ffffff;
  --texto-suave: rgba(255, 255, 255, .82);

  --font-title: "Sora", "Segoe UI", system-ui, sans-serif;
  --font-body: "Figtree", "Segoe UI", system-ui, sans-serif;

  --slide-time: 6500ms;
  --pad: clamp(1.25rem, 4vw, 4rem);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { height: 100%; }

body {
  min-height: 100%;
  font-family: var(--font-body);
  color: var(--blanco);
  background: var(--azul-oscuro);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
ul { list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

:focus-visible { outline: 3px solid var(--amarillo); outline-offset: 3px; }

/* ===== Fondo con campus ===== */
.slides, .veil { position: fixed; inset: 0; }
.slides { z-index: 0; }

.slide {
  position: absolute;
  inset: 0;
  background: var(--img) center / cover no-repeat;
  opacity: 0;
  transform: scale(1.06);
  transition: opacity 1.2s ease, transform 8s ease-out;
}
.slide.is-active { opacity: 1; transform: scale(1); }

/* Velo azul: más intenso a la izquierda para leer el texto */
.veil {
  z-index: 1;
  background:
    linear-gradient(100deg, rgba(12, 48, 80, .94) 0%, rgba(21, 78, 128, .82) 42%, rgba(21, 78, 128, .25) 100%),
    linear-gradient(0deg, rgba(12, 48, 80, .85) 0%, rgba(12, 48, 80, 0) 38%);
}

/* ===== Estructura ===== */
.page {
  position: relative;
  z-index: 2;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr auto auto;
  padding: 0 var(--pad);
}

/* ===== Header ===== */
.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: clamp(1rem, 2.5vw, 1.75rem) 0;
}

.brand {
  background: var(--blanco);
  padding: .6rem 1.1rem;
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, .25);
}
.brand img { height: clamp(34px, 5vw, 52px); width: auto; }

.top__tag {
  font-size: .95rem;
  font-weight: 500;
  color: var(--texto-suave);
  padding-left: 1rem;
  border-left: 3px solid var(--amarillo);
}

/* ===== Hero ===== */
.hero {
  display: flex;
  align-items: center;
  padding: clamp(1.5rem, 5vh, 4rem) 0;
}

.hero__copy { max-width: 40rem; }

.hero__app {
  font-family: var(--font-title);
  font-weight: 500;
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  color: var(--amarillo);
  margin-bottom: .9rem;
}

.hero__title {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(2.8rem, 9vw, 6.4rem);
  line-height: .98;
  letter-spacing: -.035em;
  margin-bottom: 1.4rem;
  animation: subir .9s cubic-bezier(.2, .8, .2, 1) both;
}

.hero__text {
  font-size: clamp(1.02rem, 1.5vw, 1.2rem);
  line-height: 1.6;
  color: var(--texto-suave);
  max-width: 34rem;
  margin-bottom: 2rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: .75rem;
  padding: 1.05rem 1.7rem;
  background: var(--amarillo);
  color: var(--azul-oscuro);
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.02rem;
  text-decoration: none;
  border-radius: 999px;
  box-shadow: 0 12px 30px rgba(241, 190, 44, .32);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn svg { transition: transform .2s ease; }
.btn:hover { background: #ffd04d; transform: translateY(-2px); box-shadow: 0 16px 36px rgba(241, 190, 44, .42); }
.btn:hover svg { transform: translateX(4px); }
.btn:active { transform: translateY(0); }

.roles {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem .9rem;
  font-size: .92rem;
  color: var(--texto-suave);
}
.roles li { display: flex; align-items: center; gap: .9rem; }
.roles li + li::before {
  content: "";
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--amarillo);
}

/* ===== Sedes (controlan el fondo) ===== */
.sedes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(.6rem, 2vw, 1.5rem);
  max-width: 46rem;
  padding-bottom: 1.25rem;
}

.sede {
  text-align: left;
  display: grid;
  gap: .15rem;
  padding-top: .2rem;
  opacity: .62;
  transition: opacity .25s ease;
}
.sede:hover, .sede.is-active { opacity: 1; }

.sede__bar {
  position: relative;
  display: block;
  height: 4px;
  border-radius: 4px;
  background: rgba(255, 255, 255, .28);
  overflow: hidden;
  margin-bottom: .7rem;
}
.sede__bar::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--amarillo);
  transform: scaleX(0);
  transform-origin: left;
}
.sede.is-active .sede__bar::after {
  animation: llenar var(--slide-time) linear forwards;
}
body.is-paused .sede.is-active .sede__bar::after { animation-play-state: paused; }

.sede__name {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: clamp(.95rem, 1.6vw, 1.25rem);
}
.sede__dep { font-size: .85rem; color: var(--texto-suave); }

/* ===== Footer ===== */
.foot {
  padding: 1rem 0 1.4rem;
  border-top: 1px solid rgba(255, 255, 255, .16);
  color: rgba(255, 255, 255, .65);
  font-size: .82rem;
}

/* ===== Animaciones ===== */
@keyframes llenar { to { transform: scaleX(1); } }
@keyframes subir {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: none; }
}

/* ===== Responsive ===== */
@media (max-width: 720px) {
  .top__tag { display: none; }
  .veil {
    background:
      linear-gradient(180deg, rgba(12, 48, 80, .88) 0%, rgba(21, 78, 128, .78) 55%, rgba(12, 48, 80, .95) 100%);
  }
  .hero { align-items: flex-end; padding-bottom: 2rem; }
  .btn { width: 100%; justify-content: center; }
  .sede__dep { display: none; }
}

@media (min-width: 1600px) {
  .hero__copy { max-width: 46rem; }
  .sedes { max-width: 52rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition-duration: .01ms !important; }
  .slide { transform: none; }
  .sede.is-active .sede__bar::after { transform: scaleX(1); }
}