:root {
  --color-fondo: #f4f6fb;
  --color-superficie: #ffffff;
  --color-borde: #e2e8f0;
  --color-texto: #1e293b;
  --color-texto-suave: #475569;

  /* Amarillos para botones y acentos */
  --color-amarillo: #facc15;
  --color-amarillo-hover: #eab308;
  --color-amarillo-claro: #fef9c3;
  --color-amarillo-borde: #f59e0b;
  --color-texto-boton: #422006;

  --radio: 16px;
  --sombra: 0 20px 45px rgba(15, 23, 42, 0.12);

  /* Celestes tomados del logo */
  --celeste: #80b0e0;
  --celeste-hover: #5b93cf;
  --celeste-claro: #eef5fc;
  --celeste-hover-claro: #dcebf9;
  --celeste-texto: #245b8f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--color-fondo);
  color: var(--color-texto);
  line-height: 1.6;
}

.contenido {
  width: 100%;
  max-width: 640px;
}

.tarjeta {
  background: var(--color-superficie);
  border: 1px solid var(--color-borde);
  border-top: 6px solid var(--color-amarillo);
  border-radius: var(--radio);
  box-shadow: var(--sombra);
  padding: 2.5rem 2rem;
  text-align: center;
}

.logo {
  display: block;
  width: 180px;
  max-width: 70%;
  height: auto;
  margin: 0 auto 1.5rem;
}

.tarjeta h1 {
  margin: 0 0 2rem;
  font-size: clamp(1.4rem, 4vw, 2rem);
  line-height: 1.3;
  color: var(--color-texto);
}

.boton {
  display: inline-block;
  text-decoration: none;
  cursor: pointer;
  border: none;
  border-radius: 10px;
  background: var(--color-amarillo);
  color: var(--color-texto-boton);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  padding: 1rem 2.4rem;
  box-shadow: 0 6px 0 var(--color-amarillo-hover);
  transition: background 0.2s ease, transform 0.1s ease, box-shadow 0.1s ease;
}

.boton:hover {
  background: var(--color-amarillo-hover);
}

.boton:active {
  transform: translateY(4px);
  box-shadow: 0 2px 0 var(--color-amarillo-hover);
}

.boton-secundario {
  margin-top: 0.85rem;
  background: var(--celeste-claro);
  color: var(--celeste-texto);
  border: 2px solid var(--celeste);
  box-shadow: none;
  font-size: 1rem;
  font-weight: 700;
  padding: 0.7rem 1.7rem;
}

.boton-secundario:hover {
  background: var(--celeste-hover-claro);
  border-color: var(--celeste-hover);
}

.boton-secundario:active {
  transform: translateY(2px);
  box-shadow: none;
}

.nota {
  margin: 2.5rem 0 0;
  padding: 1.25rem 1.4rem;
  background: var(--color-amarillo-claro);
  border-left: 5px solid var(--color-amarillo-borde);
  border-radius: 10px;
  color: #78350f;
  font-size: 1.05rem;
  font-weight: 600;
  text-align: left;
}

.nota-texto {
  margin: 0;
}

.nota .boton-secundario {
  display: block;
  width: fit-content;
  margin: 1.25rem auto 0;
}

.nota strong {
  color: #422006;
  font-weight: 800;
  background: var(--color-amarillo);
  padding: 0.05em 0.35em;
  border-radius: 5px;
}