/* Botones */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  min-height: 46px;
  padding: 0 24px;
  border-radius: 980px;
  font-size: 1.0625rem;
  font-weight: 500;
  -webkit-tap-highlight-color: transparent;
  transition: transform 140ms ease-out, background-color 240ms ease-out;
}
.btn:active { transform: scale(0.97); }
.btn--primary { background: var(--navy); color: #fff; }
.btn--primary:hover { background: var(--navy-2); }
.btn__arrow { display: inline-block; transition: transform 400ms var(--ease-out); }
.btn:hover .btn__arrow { transform: translateY(3px); }

/* Revelado */

.reveal {
  opacity: 0;
  transform: translate3d(0, 28px, 0);
  transition: opacity 1000ms var(--ease-out), transform 1100ms var(--ease-out);
  transition-delay: var(--d, 0ms);
}
.reveal.is-in { opacity: 1; transform: none; }

/* Crestas de huella (js/modules/ridges.js) */

.ridges { position: absolute; pointer-events: none; }
.ridges svg { width: 100%; height: 100%; overflow: visible; }
.ridges path {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.4;
  stroke-linecap: round;
  stroke-dasharray: var(--len) var(--len);
  stroke-dashoffset: var(--len);
  transition: stroke-dashoffset 2600ms var(--ease-out);
  transition-delay: calc(var(--i) * 70ms);
}
.ridges.is-in path { stroke-dashoffset: var(--gap, 0); }
.ridges--corner {
  width: clamp(280px, 40vw, 560px);
  aspect-ratio: 1;
  right: calc(-1 * clamp(120px, 14vw, 220px));
  top: calc(var(--nav-h) + 4vh);
  color: rgba(2, 74, 125, 0.12);
}
.ridges--center {
  width: min(120vw, 1100px);
  aspect-ratio: 1;
  left: 50%;
  top: 50%;
  translate: -50% -50%;
  color: rgba(173, 224, 234, 0.08);
}
.ridges--halo {
  inset: -18%;
  color: rgba(2, 74, 125, 0.14);
}

/* Cabeceras de sección */

.section-head { max-width: 760px; }
.section-head__body {
  margin-top: 20px;
  max-width: 46ch;
  font-size: clamp(1.0625rem, 1.5vw, 1.25rem);
  line-height: 1.5;
  color: var(--text-2);
}

@media (prefers-reduced-motion: reduce) {
  .reveal { transform: none !important; transition: opacity 400ms ease; }
  .ridges path { transition: none; stroke-dashoffset: var(--gap, 0); }
}

/* Animaciones en bucle
   Usan las propiedades translate, rotate y scale para no pisar los transform
   que escribe el scroll. Se pausan cuando su panel no se ve (js/modules/stack.js). */

@keyframes float {
  50% { translate: 0 -12px; }
}
@keyframes swim {
  0%, 100% { translate: 0 0; rotate: -2deg; }
  50% { translate: 0 -10px; rotate: 2deg; }
}
@keyframes ripple {
  from { scale: 1; opacity: 0.7; }
  to { scale: 2.8; opacity: 0; }
}
@keyframes breathe {
  from { scale: 0.94; opacity: 0.7; }
  to { scale: 1.05; opacity: 1; }
}
@keyframes drift-spin {
  to { rotate: 360deg; }
}
@keyframes nudge {
  0%, 60%, 100% { translate: 0 0; }
  30% { translate: 0 4px; }
}

.btn__arrow { animation: nudge 2.4s var(--ease-out) infinite; }
.ridges svg { animation: drift-spin 160s linear infinite; }
.ridges--halo svg { animation-direction: reverse; animation-duration: 120s; }

.panel:not(.is-playing)::before,
.panel:not(.is-playing) *,
.panel:not(.is-playing) *::before,
.panel:not(.is-playing) *::after { animation-play-state: paused !important; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; }
}