/* ============================================================
   Sitio: escenario del río, hero, secciones
   ============================================================ */

/* --- Navegación ---------------------------------------------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: var(--z-nav);
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--s-4) var(--gutter);
  transition: background var(--dur-base) var(--ease-soft), box-shadow var(--dur-base) var(--ease-soft);
}
.nav.is-scrolled { background: color-mix(in srgb, var(--sand-50) 86%, transparent); backdrop-filter: blur(10px); box-shadow: 0 1px 0 var(--line); }
.nav__brand img { height: 36px; width: auto; }
.nav__links { display: flex; gap: var(--s-5); }
.nav__links a {
  font-size: var(--fs-2xs); letter-spacing: var(--tracking-wider); text-transform: uppercase; color: var(--text-soft);
  padding-bottom: .2rem; border-bottom: 1px solid transparent;
  transition: color var(--dur-fast), border-color var(--dur-fast);
}
.nav__links a:hover, .nav__links a.is-current { color: var(--accent-deep); border-color: var(--green-500); }
@media (max-width: 980px) { .nav__links { display: none; } }
/* ?debug-river : atenúa el contenido para ver solo el río y la flora */
.debug-river .section-wrap, .debug-river .nav { opacity: .12; }

/* --- Escenario del río -------------------------------------- */
.stage { position: relative; isolation: isolate; }
.river-master { position: absolute; top: 0; left: 0; opacity: 0; pointer-events: none; }
.river-master path { fill: none; }
.river-reveal {
  position: absolute; top: 0; left: 0; width: 100%; height: 0;
  overflow: hidden; z-index: var(--z-river); pointer-events: none;
}
/* frente del río: se funde con la arena en vez de cortarse */
.river-reveal::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 320px;
  background: linear-gradient(to bottom, transparent, var(--bg) 85%);
}
.river { position: absolute; left: 0; width: 100%; overflow: hidden; will-change: transform; }
.river path { fill: none; stroke-linecap: round; stroke-linejoin: round; }
.river__bank        { stroke: #EFE3BA; opacity: .7; }
.river__bank-deep   { stroke: #E6D5A2; opacity: .3; }
.river__water-rim   { stroke: #A9CBD3; opacity: .55; }
.river__water       { stroke: #C9E2E6; opacity: .95; }
.river__water-light { stroke: #E2F0F2; opacity: .6; }
.river__pigment     { stroke: #8FB8C4; opacity: .5; }

.flora { position: absolute; inset: 0; z-index: var(--z-flora); pointer-events: none; overflow: hidden; }
.flora__item { position: absolute; left: 0; top: 0; opacity: 0; will-change: transform, opacity; mix-blend-mode: multiply; }
.flora__item img { width: 100%; height: auto; }

.section-wrap { position: relative; z-index: var(--z-content); }

/* --- Hero (sobre la arena, sin tarjeta) ---------------------- */
.hero {
  min-height: 100svh;
  display: grid; place-items: center;
  padding: var(--s-10) var(--gutter) var(--s-10);
  position: relative; overflow: hidden;
}
.hero__wash { position: absolute; z-index: 0; pointer-events: none; mix-blend-mode: multiply; opacity: .9; }
.hero__wash--a { width: min(72vw, 980px); right: -18vw; top: -14vh; transform: rotate(6deg); }
.hero__wash--b { width: min(60vw, 760px); left: -16vw; bottom: -16vh; transform: rotate(-9deg); opacity: .8; }
.hero__text { position: relative; z-index: 1; width: min(100%, 50rem); text-align: center; }
.hero__names { margin: var(--s-6) 0; }
.hero__names .display { display: block; }
.hero__amp { display: block; margin: .5rem 0; color: var(--green-500); font-size: clamp(1.5rem, 1rem + 2vw, 2.25rem); }
.hero__place { margin-top: var(--s-6); color: var(--text-soft); }
.hero__place strong { font-weight: 400; color: var(--accent-deep); }
.hero__mono { position: static; width: clamp(40px, 5vw, 56px); margin: var(--s-7) auto 0; opacity: .9; }
.hero__count { margin-top: var(--s-6); }
.hero__cue {
  position: absolute; left: 50%; bottom: var(--s-6); transform: translateX(-50%); z-index: 1;
  display: flex; flex-direction: column; align-items: center; gap: .5rem;
  color: var(--text-muted); font-size: var(--fs-2xs); letter-spacing: var(--tracking-wider); text-transform: uppercase;
}
.hero__cue svg { width: 14px; height: 24px; animation: cue 2.6s var(--ease-soft) infinite; }
@keyframes cue { 0%, 100% { transform: translateY(0); opacity: .5 } 50% { transform: translateY(6px); opacity: 1 } }
@media (max-width: 760px) {
  .hero__wash--a { width: 120vw; right: -40vw; top: -10vh; }
  .hero__wash--b { width: 110vw; left: -45vw; bottom: -12vh; }
}

/* --- Secciones a lo largo del río ---------------------------- */
.section {
  position: relative;
  padding: var(--s-11) var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, var(--measure)) minmax(0, 1fr);
}
.section__inner { grid-column: 2; }
@media (min-width: 900px) {
  .section { grid-template-columns: repeat(12, 1fr); column-gap: var(--s-4); width: min(100%, var(--container)); margin-inline: auto; }
  .section--left  .section__inner { grid-column: 2 / span 6; }
  .section--right .section__inner { grid-column: 6 / span 6; }
  .section--center .section__inner { grid-column: 4 / span 6; text-align: center; }
  .section--center .leaf-rule { max-width: 16rem; margin-inline: auto; }
}
.section__head { margin-bottom: var(--s-6); }
.section__head .display { margin: .5rem 0 .75rem; }
.section + .section { padding-top: var(--s-10); }

/* contenido con un velo de arena para que el río no compita con el texto */
.veil { position: relative; }
.veil::before {
  content: ""; position: absolute; inset: -2rem -1.5rem; z-index: -1; border-radius: 40% 60% 55% 45% / 50% 40% 60% 50%;
  background: radial-gradient(ellipse at center, color-mix(in srgb, var(--sand-50) 92%, transparent) 55%, transparent 75%);
}

/* itinerario: dos días */
.days { display: grid; gap: var(--s-7); }
.day { padding: clamp(1.5rem, 4vw, 2.5rem); }
.day__date { margin: var(--s-3) 0 var(--s-1); font-size: var(--fs-md); color: var(--text-soft); }
.day__title { font-size: clamp(1.6rem, 1.2rem + 1.4vw, 2.1rem); margin-bottom: var(--s-5); }
.day .facts { margin-top: var(--s-5); }
.day__actions { margin-top: var(--s-5); }

/* ruta: pasos de transporte */
.route { display: grid; gap: var(--s-4); counter-reset: step; }
.route__step { display: grid; grid-template-columns: 2.25rem 1fr; gap: var(--s-3); align-items: start; }
.route__step::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  font-size: var(--fs-xs); letter-spacing: var(--tracking-wide); color: var(--accent);
  padding-top: .35rem; border-top: 1px solid var(--green-500);
}

/* RSVP */
.rsvp { text-align: center; }
.rsvp__actions { display: flex; flex-wrap: wrap; gap: var(--s-3); justify-content: center; margin-top: var(--s-6); }

/* --- Pie ------------------------------------------------------- */
.footer {
  position: relative; z-index: var(--z-content);
  padding: var(--s-10) var(--gutter) var(--s-8);
  text-align: center; color: var(--text-muted);
}
.footer img { width: 72px; margin: 0 auto var(--s-4); opacity: .9; }