/* ==========================================================================
   That's English! — Landing Matrícula 2026/27
   Design tokens extraídos del Manual de Marca / Design System oficial
   (Primario #465AFF · Contraste #F5D871 · Tipografía Raleway · escala 1.333)
   ========================================================================== */

:root {
  /* Color */
  --color-primary: #465AFF;
  --color-primary-600: #0A3CD6;
  --color-primary-700: #072CB0;
  --color-bg-soft: #EAEFFF;
  --color-bg-soft-2: #E0E4F3;
  --color-accent: #F5D871;
  --color-accent-hover: #F5E871;
  --color-text: #1A1A1A;
  --color-text-soft: #383838;
  --color-white: #FFFFFF;

  --color-level-a2: #E75329;
  --color-level-b1: #72D0DF;
  --color-level-b2: #4AD459;
  --color-level-c1: #FFA114;

  /* Tipografía: escala modular 1.333 (perfect fourth), fluida */
  --font-brand: 'Raleway', -apple-system, BlinkMacSystemFont, sans-serif;
  --fs-h1: clamp(2.25rem, 1.4rem + 4vw, 3.75rem);
  --fs-h2: clamp(1.75rem, 1.3rem + 2.4vw, 2.75rem);
  --fs-h3: clamp(1.25rem, 1.1rem + 1vw, 1.5rem);
  --fs-lead: clamp(1.0625rem, 1rem + 0.4vw, 1.25rem);
  --fs-body: 1rem;
  --fs-small: 1.0625rem;

  /* Espaciado (base 8px) */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;
  --space-8: 8rem;

  --radius: 16px;
  --radius-sm: 10px;
  --container-max: 1200px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   Reset
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

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

body {
  font-family: var(--font-brand);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

ul { list-style: none; }

button { font: inherit; cursor: pointer; border: none; background: none; }

input { font: inherit; }

h1, h2, h3 { font-weight: 800; line-height: 1.15; letter-spacing: -0.01em; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   Layout utilities
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

.section { padding-block: var(--space-7); }

.section-title {
  font-size: var(--fs-h2);
  text-align: center;
  max-width: 40ch;
  margin-inline: auto;
  margin-bottom: var(--space-5);
}

/* Reveal-on-scroll (progressive enhancement, ver main.js) */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ==========================================================================
   Botones — mismos estados que el Design System (Action 1)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-brand);
  font-weight: 700;
  font-size: var(--fs-body);
  padding: 0.9rem 1.75rem;
  border-radius: var(--radius-sm);
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease), transform 0.15s var(--ease), box-shadow 0.25s var(--ease);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-text);
}
.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 8px 24px -8px rgba(70, 90, 255, 0.55);
}
.btn-primary:active { transform: translateY(1px); }

.btn-lg {
  padding: 1.1rem 2.25rem;
  font-size: clamp(1rem, 0.95rem + 0.3vw, 1.125rem);
}

.btn-block { width: 100%; }

.btn-header {
  padding: 0.65rem 1.25rem;
  font-size: var(--fs-small);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s;
}
.site-header.is-stuck .btn-header {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.site-header.is-stuck {
  border-color: var(--color-bg-soft-2);
  box-shadow: 0 4px 20px -8px rgba(26, 26, 26, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.9rem;
}

.logo-img { height: 44px; width: auto; }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero { padding-block: var(--space-6) var(--space-5); }

/* Hueco hero -> beneficios reducido a la mitad respecto al resto de secciones */
#beneficios { padding-top: var(--space-5); }

.hero-grid {
  display: grid;
  gap: var(--space-6);
  align-items: center;
}

.hero-visual { order: -1; }

.eyebrow {
  font-size: var(--fs-small);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.hero-title {
  font-size: var(--fs-h1);
  margin-bottom: var(--space-3);
}

.hero-lead {
  font-size: var(--fs-lead);
  color: var(--color-text-soft);
  max-width: 52ch;
  margin-bottom: var(--space-4);
}

.price-block {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: var(--space-4);
}
.price-label {
  font-size: var(--fs-lead);
  font-weight: 600;
}
.price-value {
  font-weight: 800;
  font-size: clamp(1.375rem, 1.1rem + 1.2vw, 1.75rem);
  color: var(--color-text);
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 0.3rem 0.9rem;
}

.hero-microcopy {
  margin-top: var(--space-3);
  font-size: var(--fs-small);
  color: var(--color-text-soft);
}

/* ==========================================================================
   Banner e imágenes reales
   ========================================================================== */
.hero-banner-img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.include-img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius);
  margin-top: auto;
}

/* ==========================================================================
   Cards — ¿Por qué elegirnos?
   ========================================================================== */
.cards-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-bg-soft-2);
  border-radius: var(--radius);
  padding: var(--space-4);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -20px rgba(26, 26, 26, 0.18);
  border-color: transparent;
}

.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-soft);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
}
.card-icon svg { width: 24px; height: 24px; color: var(--color-primary); }

.card h3 { font-size: var(--fs-h3); margin-bottom: 0.5rem; }
.card p { color: var(--color-text-soft); font-size: 1rem; }

.level-chips {
  display: flex;
  gap: 0.5rem;
  margin-top: var(--space-3);
  flex-wrap: wrap;
}
.level-chip {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--color-white);
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
}
.level-a2 { background: var(--color-level-a2); }
.level-b1 { background: var(--color-level-b1); color: var(--color-text); }
.level-b2 { background: var(--color-level-b2); color: var(--color-text); }
.level-c1 { background: var(--color-level-c1); color: var(--color-text); }

/* ==========================================================================
   CTA banner intermedio
   ========================================================================== */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-700) 100%);
  padding-block: var(--space-6);
}
.cta-banner-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  text-align: center;
}
.cta-banner h2 {
  color: var(--color-white);
  font-size: var(--fs-h2);
}

/* ==========================================================================
   Qué incluye
   ========================================================================== */
.include-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
.include-item {
  display: flex;
  gap: var(--space-3);
}
.include-item h3 { font-size: var(--fs-h3); margin-bottom: 0.35rem; }
.include-item p { color: var(--color-text-soft); font-size: 1rem; }
.include-item .card-icon { flex-shrink: 0; }
.include-item > div:last-child { flex: 1; min-width: 0; display: flex; flex-direction: column; }

/* ==========================================================================
   Formulario de matrícula
   ========================================================================== */
.form-section { background: var(--color-bg-soft); }

.form-grid {
  display: grid;
  gap: var(--space-5);
}

.form-intro h2 { text-align: left; margin-bottom: var(--space-2); }
.form-intro p { color: var(--color-text-soft); margin-bottom: var(--space-3); font-size: var(--fs-lead); }

.form-benefits { display: flex; flex-direction: column; gap: 0.65rem; }
.form-benefits li {
  position: relative;
  padding-left: 1.6rem;
  font-size: 1rem;
  color: var(--color-text-soft);
}
.form-benefits li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.35rem;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-accent);
}
.form-benefits li::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 0.55rem;
  width: 7px;
  height: 4px;
  border-left: 2px solid var(--color-text);
  border-bottom: 2px solid var(--color-text);
  transform: rotate(-45deg);
}

.lead-form {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: var(--space-4);
  box-shadow: 0 30px 60px -30px rgba(26, 26, 26, 0.25);
}

.form-row { margin-bottom: var(--space-3); }
.form-row label {
  display: block;
  font-size: var(--fs-small);
  font-weight: 700;
  margin-bottom: 0.4rem;
}
.form-optional {
  font-weight: 400;
  color: var(--color-text-soft);
  text-transform: none;
  letter-spacing: normal;
}
.form-row input[type="text"],
.form-row input[type="email"],
.form-row input[type="tel"],
.form-row select {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1.5px solid var(--color-bg-soft-2);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  font-family: var(--font-brand);
  font-size: var(--fs-body);
  color: var(--color-text);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.form-row select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23383838' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
  background-size: 18px;
  padding-right: 2.5rem;
}
.form-row select:invalid { color: var(--color-text-soft); }
.form-row input:focus,
.form-row select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(70, 90, 255, 0.15);
}
.form-row input:invalid.touched,
.form-row select:invalid.touched { border-color: #E75329; }

.form-row--checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}
.form-row--checkbox input { margin-top: 0.2rem; width: 18px; height: 18px; accent-color: var(--color-primary); flex-shrink: 0; }
.form-row--checkbox label { font-size: 1rem; font-weight: 400; color: var(--color-text-soft); }
.form-row--checkbox a { color: var(--color-primary); font-weight: 600; text-decoration: underline; }

.form-note {
  margin-top: var(--space-2);
  font-size: var(--fs-small);
  color: #E75329;
  text-align: center;
}

.form-success {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: var(--space-5);
  text-align: center;
  box-shadow: 0 30px 60px -30px rgba(26, 26, 26, 0.25);
}
.form-success svg { width: 48px; height: 48px; color: var(--color-primary); margin-inline: auto; margin-bottom: var(--space-2); }
.form-success h3 { font-size: var(--fs-h3); margin-bottom: 0.5rem; }
.form-success p { color: var(--color-text-soft); }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--color-text);
  padding-block: var(--space-6);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
}
.footer-logo { height: 35px; }
.footer-tagline { color: rgba(255,255,255,0.7); font-size: var(--fs-small); }
.footer-ministry {
  background: var(--color-white);
  border-radius: var(--radius-sm);
  padding: 0.6rem 1rem;
  margin-top: var(--space-1);
}
.footer-ministry-logo { height: 49px; width: auto; }
.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-top: var(--space-2);
}
.footer-links a {
  color: rgba(255,255,255,0.75);
  font-size: 1rem;
  transition: color 0.2s var(--ease);
}
.footer-links a:hover { color: var(--color-white); }
.footer-copy {
  margin-top: var(--space-3);
  color: rgba(255,255,255,0.45);
  font-size: 0.9375rem;
}

/* ==========================================================================
   Breakpoints — mobile-first
   ========================================================================== */
@media (min-width: 640px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row--2col { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
}

@media (min-width: 1024px) {
  .container { padding-inline: var(--space-4); }

  .cards-grid { grid-template-columns: repeat(4, 1fr); }

  .include-grid { grid-template-columns: repeat(2, 1fr); }

  .form-grid { grid-template-columns: 0.9fr 1.1fr; align-items: start; }
  .form-intro h2 { font-size: var(--fs-h2); }
}

@media (min-width: 1280px) {
  .section { padding-block: var(--space-8); }
  #beneficios { padding-top: var(--space-6); }
}