/* Cartilla · base compartida: tokens, reset, tipografía, controles y foco. */
:root {
  /* Afiche: colores planos enteros, como la portada. */
  --amarillo: #ffd249;
  --amarillo-2: #f5c63c;
  --rosa: #ffc4ef;
  --cian: #a4f6f8;
  --naranja: #f9a21f;
  --magenta: #f53fd6;

  --bg: #ffffff;
  --surface: #f1f1f1;
  --surface-2: #e4e4e4;
  --ink: #0a0a0a;
  --muted: #4d4d4d;
  /* Azul hondo del agua: marcas pequeñas, barras y enlaces. */
  --accent: #0b4f55;
  --accent-dark: #083a3f;
  --accent-ink: #ffffff;
  --tint-50: #e6fbfc;
  --tint-100: #a4f6f8;
  --tint-200: #6fdde2;
  --rojo: #a3123a;
  --rojo-tint: #ffc4ef;
  --tablero: #ffd249;
  --tablero-ink: #0a0a0a;
  --rule: #dcdcdc;
  --raya: #d8d8d8;

  --display: "Anton", "Arial Narrow", Impact, sans-serif;
  --text: "Work Sans", system-ui, sans-serif;

  --step-small: clamp(0.875rem, 0.85rem + 0.1vw, 0.9375rem);
  --step-body: clamp(1.0625rem, 1rem + 0.25vw, 1.1875rem);
  --step-lead: clamp(1.25rem, 1.1rem + 0.6vw, 1.6rem);
  --step-head: clamp(2.6rem, 1.4rem + 5vw, 5.75rem);

  --margen: clamp(16px, 2.2vw, 32px);
  --ease-out: cubic-bezier(.16, 1, .3, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--text);
  font-size: var(--step-body);
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  font-variant-numeric: lining-nums;
  text-rendering: optimizeLegibility;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
h1, h2, h3, h4 { margin: 0; font-weight: 500; line-height: 1.05; text-wrap: balance; }
p { margin: 0; }
a { color: var(--accent); text-underline-offset: 0.18em; text-decoration-thickness: 1px; font-weight: 600; }
a:hover { text-decoration-thickness: 2px; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
.num { font-variant-numeric: tabular-nums lining-nums; }

:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; }
::selection { background: var(--tint-200); color: var(--ink); }

.saltar {
  position: absolute; left: 12px; top: -60px; z-index: 100;
  background: var(--ink); color: #fff; padding: 10px 16px; text-decoration: none;
}
.saltar:focus { top: 12px; }
.sr { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Botones: un solo estilo, esquinas rectas como papel recortado. */
.boton {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 52px; padding: 0 26px;
  font-family: var(--text); font-size: 1.0625rem; font-weight: 600; line-height: 1.1;
  background: var(--magenta); color: var(--ink);
  border: 0; border-radius: 0; text-decoration: none;
  transition: transform .14s var(--ease-out), background-color .2s;
  touch-action: manipulation;
}
.boton:hover { background: #ff5fe2; }
.boton:active { transform: translateY(1px) scale(.985); }
.boton[disabled], .boton[aria-disabled="true"] { opacity: .45; cursor: not-allowed; transform: none; }
.boton--tinta { background: var(--ink); color: #fff; }
.boton .girando { border-color: currentColor; border-right-color: transparent; }
.boton--tinta:hover { background: #333; }
.boton--suave { background: var(--surface); color: var(--ink); }
.boton--suave:hover { background: var(--surface-2); }
.boton--peligro { background: var(--rojo); color: #fff; }
.boton--peligro:hover { background: #8e0d18; }
.boton--ancho { width: 100%; }
.boton .girando { width: 18px; height: 18px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: girar .7s linear infinite; }
@keyframes girar { to { transform: rotate(360deg); } }

.enlace-boton { background: none; border: 0; padding: 0; color: var(--accent); text-decoration: underline; text-underline-offset: .18em; }

/* Formularios */
.campo { display: grid; gap: 6px; margin-bottom: 22px; }
.campo label, .campo .etiqueta { font-weight: 500; }
.campo .ayuda { font-size: var(--step-small); color: var(--muted); }
.campo input, .campo select, .campo textarea {
  width: 100%; min-height: 50px; padding: 12px 14px;
  background: var(--surface); border: 2px solid transparent; border-radius: 0;
  font-size: 1.125rem;
}
.campo textarea { min-height: 220px; line-height: 1.5; resize: vertical; }
.campo input:focus, .campo select:focus, .campo textarea:focus { outline: none; border-color: var(--ink); background: #fff; }
.campo--error input, .campo--error textarea, .campo--error select { border-color: var(--rojo); background: #fff; }
.campo .error { color: var(--rojo); font-size: 1rem; font-weight: 500; }
.clave-envoltura { position: relative; }
.clave-envoltura input { padding-right: 96px; }
.clave-envoltura button { position: absolute; right: 6px; top: 50%; transform: translateY(-50%); min-height: 40px; padding: 0 12px; background: none; border: 0; color: var(--accent); font-weight: 600; }

.resumen-errores { background: var(--rojo-tint); color: var(--ink); padding: 16px 20px; margin-bottom: 24px; border-left: 4px solid var(--rojo); }
.resumen-errores h2 { font-family: var(--text); font-size: 1.15rem; font-weight: 600; margin-bottom: 6px; }
.resumen-errores ul { margin: 0; padding-left: 20px; }

.aviso { padding: 14px 18px; margin-bottom: 20px; background: var(--tint-50); border-left: 4px solid var(--accent); }
.aviso--error { background: var(--rojo-tint); border-left-color: var(--rojo); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}

/* =================== Capa suave: radios grandes y transiciones con resorte =================== */
:root { --r: clamp(22px, 2.4vw, 34px); --r-s: 16px; --resorte: cubic-bezier(.34, 1.4, .64, 1); }
.boton { border-radius: 999px; padding: 0 28px; transition: transform .45s var(--resorte), background-color .3s ease, color .3s ease; }
.boton:hover { transform: translateY(-2px); }
.boton:active { transform: scale(.97); transition-duration: .12s; }
.campo input, .campo select, .campo textarea { border-radius: 14px; transition: border-color .25s ease, background-color .25s ease; }
.resumen-errores, .aviso { border-radius: var(--r-s); border-left: 0; }
.clave-envoltura button { border-radius: 999px; }