/* ==========================================================================
   Página de gracias — Comunidad del Intercambio
   Fondo claro con marca de agua, como la de referencia. Un solo paso:
   entrar al grupo de WhatsApp.
   ========================================================================== */

:root {
  --bg: #f2f4f5;
  --ink: #14181d;
  --ink-soft: #5a656f;
  --muted: #7c8890;
  --cyan: #33bfd3;
  --cyan-ink: #1a8d9e;
  --lima: #99c342;
  --lima-2: #82ab33;
  --borde: rgba(20, 24, 29, 0.09);
  --centro: 900px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg);
  /* Marca de agua diagonal, en SVG embebido (no requiere descargar imagen) */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='360' height='224' viewBox='0 0 360 224'%3E%3Ctext x='0' y='132' transform='rotate(-18 0 132)' font-family='Montserrat, Arial, sans-serif' font-size='48' font-weight='800' fill='%2314181d' fill-opacity='0.028'%3EINTERCAMBIO%3C/text%3E%3C/svg%3E");
  color: var(--ink);
  font-family: "Open Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1 { font-family: "Montserrat", sans-serif; margin: 0; }

ul { list-style: none; margin: 0; padding: 0; }

.centro {
  width: 100%;
  max-width: var(--centro);
  margin: 0 auto;
  padding-inline: 24px;
}

/* ==================== CONTENIDO ==================== */

.gracias {
  flex: 1 0 auto;
  display: flex;
  align-items: center;
  padding: 72px 0 80px;
  text-align: center;
}

.paso {
  font-family: "Montserrat", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.34em;
  color: var(--cyan-ink);
  margin: 0 0 18px;
}

.gracias h1 {
  font-size: clamp(2.5rem, 6.5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.gracias h1 span { color: var(--cyan-ink); }

.bajada {
  font-size: 1.1rem;
  color: var(--ink-soft);
  max-width: 38ch;
  margin: 0 auto 40px;
}

.bajada b { color: var(--ink); font-weight: 700; }

/* ==================== TARJETA DEL BOTÓN ==================== */

.tarjeta {
  background: #fff;
  border: 1px solid var(--borde);
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(20, 34, 39, 0.09);
  max-width: 640px;
  margin: 0 auto;
  padding: 38px 30px 30px;
}

.tarjeta__texto {
  font-size: 1.02rem;
  color: var(--ink-soft);
  max-width: 46ch;
  margin: 0 auto 28px;
}

.tarjeta__texto b { color: var(--ink); font-weight: 700; }

.btWpp {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  width: 100%;
  min-height: 68px;
  padding: 18px 28px;
  background: var(--lima);
  border-radius: 51px;
  box-shadow: 0 11px 20px rgba(90, 150, 40, 0.32), inset 0 -3px 0 rgba(0, 0, 0, 0.17);
  color: #fff;
  font-family: "Montserrat", sans-serif;
  font-size: 1.12rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: all 0.3s ease;
}

.btWpp svg { width: 30px; height: 30px; flex: none; }

.btWpp:hover {
  background: var(--lima-2);
  transform: translateY(-2px);
  box-shadow: 0 16px 26px rgba(90, 150, 40, 0.4), inset 0 -3px 0 rgba(0, 0, 0, 0.17);
}

.btWpp:active { transform: translateY(0); }

.tarjeta__nota {
  font-size: 0.8rem;
  color: var(--muted);
  margin: 16px 0 0;
}

/* ==================== RECORDATORIO DE LA CLASE ==================== */

.cita {
  max-width: 640px;
  margin: 40px auto 0;
  padding: 26px 24px 22px;
  border: 1px solid var(--borde);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.55);
}

.cita__titulo {
  font-family: "Montserrat", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
  margin: 0 0 14px;
}

.countdown {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

.countdown li {
  display: flex;
  align-items: baseline;
  gap: 5px;
}

.countdown li span {
  font-family: "Montserrat", sans-serif;
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.countdown li p {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--cyan-ink);
  margin: 0;
}

.cita__pie {
  font-size: 0.86rem;
  color: var(--ink-soft);
  margin: 14px 0 0;
}

.cita__pie b { color: var(--ink); }

/* ==================== BANDA INFERIOR ==================== */

.marquee {
  flex: none;
  overflow: hidden;
  background: var(--cyan);
  color: #04343c;
  padding: 13px 0;
  display: flex;
  white-space: nowrap;
  user-select: none;
}

.marquee__track {
  display: flex;
  flex: none;
  animation: marquee 38s linear infinite;
}

.marquee__track span {
  font-family: "Montserrat", sans-serif;
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  padding-inline: 20px;
}

@keyframes marquee {
  to { transform: translateX(-50%); }
}

/* ==================== FOOTER ==================== */

footer {
  flex: none;
  background: #fff;
  border-top: 1px solid var(--borde);
}

footer .centro {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  max-width: 1280px;
  padding: 22px 40px;
  flex-wrap: wrap;
}

footer p {
  margin: 0;
  color: #646e76;
  font-size: 0.81rem;
}

footer .links { display: flex; gap: 24px; flex-wrap: wrap; }

footer a {
  color: #646e76;
  font-size: 0.81rem;
  text-decoration: none;
  transition: color 0.3s ease;
}

footer a:hover { color: #000; text-decoration: underline; }

/* ==================== RESPONSIVE ==================== */

@media (max-width: 640px) {
  .centro { padding-inline: 18px; }

  .gracias { padding: 46px 0 54px; }
  .gracias h1 { font-size: 2.3rem; }
  .bajada { font-size: 1rem; margin-bottom: 30px; }

  .tarjeta { padding: 28px 20px 24px; border-radius: 12px; }
  .tarjeta__texto { font-size: 0.96rem; margin-bottom: 24px; }

  /* El botón se apila para que el texto no se apriete contra el icono */
  .btWpp {
    flex-direction: column;
    gap: 8px;
    min-height: 0;
    padding: 18px 20px 20px;
    font-size: 1rem;
    line-height: 1.25;
    border-radius: 22px;
  }

  .btWpp svg { width: 28px; height: 28px; }

  .cita { margin-top: 28px; padding: 22px 18px 18px; }
  .countdown { gap: 14px; }
  .countdown li span { font-size: 1.4rem; }

  footer .centro { flex-direction: column; text-align: center; padding: 22px 18px; }
  footer .links { justify-content: center; gap: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  .marquee__track { animation: none; }
  * { transition: none !important; }
}