/* Escuela en Línea — estilos académicos, ligeros y responsive */

:root {
  --color-ink: #1a2744;
  --color-blue: #1e3a5f;
  --color-blue-light: #2b5a8a;
  --color-teal: #0d9488;
  --color-chalk: #f8fafc;
  --color-muted: #64748b;
  --color-border: #e2e8f0;
  --color-red: #dc2626;
  --color-green: #166534;
  --color-paper: #f1f5f9;
  --font-sans: "Source Sans 3", system-ui, -apple-system, sans-serif;
  --font-display: "Fraunces", Georgia, serif;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --radius: 12px;
  --header-h: 72px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-ink);
  background: #fff;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-blue-light);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--color-teal);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 9999;
  padding: 0.75rem 1rem;
  background: var(--color-blue);
  color: #fff;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  min-height: var(--header-h);
}

.site-header__inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0.65rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-logo {
  flex-shrink: 0;
}

.site-logo img {
  height: 48px;
  width: auto;
}

@media (min-width: 768px) {
  .site-logo img {
    height: 56px;
  }
}

.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-ink);
  position: relative;
}

.nav-toggle__bar::before,
.nav-toggle__bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--color-ink);
}

.nav-toggle__bar::before {
  top: -6px;
}

.nav-toggle__bar::after {
  top: 6px;
}

@media (min-width: 900px) {
  .nav-toggle {
    display: none;
  }
}

.site-nav {
  display: none;
  width: 100%;
  flex-basis: 100%;
}

.site-nav.is-open {
  display: block;
}

@media (min-width: 900px) {
  .site-nav {
    display: block;
    width: auto;
    flex-basis: auto;
  }
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0.5rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

@media (min-width: 900px) {
  .site-nav ul {
    flex-direction: row;
    align-items: center;
    gap: 0.35rem;
    padding: 0;
  }
}

.site-nav a {
  display: block;
  padding: 0.6rem 0.85rem;
  border-radius: 8px;
  color: var(--color-ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

.site-nav a:hover {
  background: var(--color-paper);
  color: var(--color-blue);
}

.site-nav a[aria-current="page"] {
  background: linear-gradient(135deg, #e0f2fe 0%, #f0fdfa 100%);
  color: var(--color-blue);
}

.hero {
  position: relative;
  min-height: min(52vh, 420px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 3rem 1.25rem;
  background-color: #1a3d2e;
  background-image: url("../assets/img/home_school_slide_1_bg.jpg");
  background-size: cover;
  background-position: center;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(15, 30, 22, 0.45) 0%,
    rgba(15, 30, 22, 0.55) 100%
  );
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 900px;
}

.hero h1 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--color-chalk);
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.35);
  letter-spacing: -0.02em;
}

.hero--page {
  min-height: min(38vh, 280px);
  padding: 2.5rem 1.25rem;
}

.hero--page h1 {
  font-size: clamp(1.85rem, 3.5vw, 2.35rem);
}

.breadcrumbs {
  margin: 0.75rem 0 0;
  font-size: 0.9rem;
  color: rgba(248, 250, 252, 0.88);
}

.breadcrumbs a {
  color: #bae6fd;
  text-decoration: none;
}

.breadcrumbs a:hover {
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  padding: 3.5rem 0;
}

.section--paper {
  background: var(--color-paper);
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 3vw, 2.1rem);
  font-weight: 700;
  color: var(--color-blue);
  text-align: center;
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}

.section__lead {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 2.5rem;
  color: var(--color-muted);
  font-size: 1.05rem;
}

.lead-statement {
  text-align: center;
  font-size: clamp(1.15rem, 2.2vw, 1.35rem);
  font-weight: 600;
  color: var(--color-blue-light);
  max-width: 720px;
  margin: 0 auto 1rem;
  line-height: 1.45;
}

.dots {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin: 1rem 0 2rem;
}

.dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-blue-light);
  opacity: 0.5;
}

.card-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .card-grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  border-radius: var(--radius);
  padding: 1.75rem;
  color: #fff;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.feature-card--blue {
  background: linear-gradient(160deg, #1e3a5f 0%, #0f2744 100%);
}

.feature-card--slate {
  background: linear-gradient(160deg, #334155 0%, #1e293b 100%);
}

.feature-card--red {
  background: linear-gradient(160deg, #b91c1c 0%, #7f1d1d 100%);
}

.feature-card h2 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin: 0 0 1rem;
  font-weight: 700;
}

.feature-card p,
.feature-card li {
  font-size: 0.98rem;
  opacity: 0.95;
  line-height: 1.6;
}

.feature-card ul {
  margin: 0 0 1.25rem;
  padding-left: 1.15rem;
}

.feature-card .btn {
  margin-top: auto;
  align-self: flex-start;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.25rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:focus-visible {
  outline: 2px solid var(--color-teal);
  outline-offset: 2px;
}

.btn--light {
  background: #fff;
  color: var(--color-blue);
}

.btn--light:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
  color: var(--color-blue);
}

.btn--primary {
  background: var(--color-blue-light);
  color: #fff;
}

.btn--primary:hover {
  background: var(--color-blue);
  color: #fff;
  transform: translateY(-1px);
}

.timeline {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 0 0 1.5rem;
}

@media (min-width: 640px) {
  .timeline {
    padding: 0;
  }
}

.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--color-blue-light), var(--color-teal));
  border-radius: 2px;
}

@media (min-width: 640px) {
  .timeline::before {
    left: 50%;
    margin-left: -1.5px;
  }
}

.timeline-item {
  position: relative;
  padding-bottom: 2rem;
  padding-left: 1.75rem;
}

@media (min-width: 640px) {
  .timeline-item {
    width: 50%;
    padding-left: 2rem;
    padding-right: 2rem;
  }

  .timeline-item:nth-child(odd) {
    margin-left: 0;
    text-align: right;
    padding-left: 2rem;
    padding-right: 2.5rem;
  }

  .timeline-item:nth-child(even) {
    margin-left: 50%;
    text-align: left;
    padding-left: 2.5rem;
  }
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.35rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-blue-light);
  border: 3px solid #fff;
  box-shadow: var(--shadow-sm);
  z-index: 1;
}

@media (min-width: 640px) {
  .timeline-item:nth-child(odd)::before {
    left: auto;
    right: -8px;
  }

  .timeline-item:nth-child(even)::before {
    left: -8px;
  }
}

.timeline-item time {
  display: block;
  font-weight: 700;
  color: var(--color-blue);
  font-size: 0.95rem;
  margin-bottom: 0.35rem;
}

.timeline-item p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.98rem;
}

.pillars {
  display: grid;
  gap: 2rem;
}

@media (min-width: 768px) {
  .pillars {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pillar {
  text-align: center;
  padding: 1.5rem;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.pillar__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1rem;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  background: linear-gradient(135deg, #e0f2fe, #ccfbf1);
}

.pillar h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin: 0 0 0.5rem;
  color: var(--color-blue);
}

.pillar p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-muted);
}

.sponsors {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1.25rem 2rem;
  padding: 1.5rem;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.sponsors span {
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.cta-block {
  display: grid;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 768px) {
  .cta-block {
    grid-template-columns: 1fr 1fr;
  }
}

.cta-block__text h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw, 1.85rem);
  margin: 0 0 0.75rem;
  color: var(--color-blue);
}

.two-col {
  display: grid;
  gap: 2rem;
}

@media (min-width: 768px) {
  .two-col {
    grid-template-columns: 1fr 1fr;
  }
}

.benefit-block h2 {
  font-size: 1.15rem;
  margin: 0 0 0.5rem;
  color: var(--color-blue);
}

.benefit-block p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.98rem;
}

.list-check {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
}

.list-check li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.65rem;
  color: var(--color-muted);
}

.list-check li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-teal);
  font-weight: 700;
}

.contact-grid {
  display: grid;
  gap: 2.5rem;
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.contact-card {
  padding: 1.5rem;
  border-radius: var(--radius);
  background: var(--color-paper);
  border: 1px solid var(--color-border);
}

.contact-card h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin: 0 0 1rem;
  color: var(--color-blue);
}

.embed-wrap {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: #fff;
  min-height: 200px;
}

.embed-wrap iframe,
.embed-wrap > div {
  width: 100%;
}

.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 3rem 0 0;
  font-size: 0.95rem;
}

.site-footer a {
  color: #cbd5e1;
}

.site-footer a:hover {
  color: #fff;
}

.footer-grid {
  display: grid;
  gap: 2rem;
  padding-bottom: 2rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1.2fr 1fr 1fr 1fr;
  }
}

.footer-brand img {
  height: 40px;
  width: auto;
  opacity: 0.95;
}

.footer-brand p {
  margin: 0.75rem 0 0;
  font-size: 0.88rem;
  line-height: 1.5;
}

.footer-col h3 {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #64748b;
  font-weight: 700;
}

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

.footer-col li {
  margin-bottom: 0.4rem;
}

.footer-col a {
  text-decoration: none;
}

.footer-search {
  display: flex;
  gap: 0.5rem;
}

.footer-search input {
  flex: 1;
  padding: 0.5rem 0.75rem;
  border: 1px solid #334155;
  border-radius: 6px;
  background: #1e293b;
  color: #f1f5f9;
  font: inherit;
}

.footer-search input::placeholder {
  color: #64748b;
}

.footer-search button {
  padding: 0.5rem 0.85rem;
  border: none;
  border-radius: 6px;
  background: var(--color-blue-light);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.85rem;
}

.footer-search button:hover {
  background: #3b82f6;
}

.footer-help {
  font-size: 0.9rem;
  line-height: 1.55;
  color: #94a3b8;
}

.footer-help p {
  margin: 0 0 0.65rem;
}

.footer-help p:last-child {
  margin-bottom: 0;
}

.footer-help a {
  color: #e2e8f0;
  font-weight: 600;
  text-decoration: none;
}

.footer-help a:hover {
  color: #fff;
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid #1e293b;
  padding: 1rem 1.25rem;
  text-align: center;
  font-size: 0.82rem;
  color: #64748b;
}

.footer-bottom a {
  color: #7dd3fc;
}

.page-main {
  padding: 2.5rem 0 3rem;
}

/* Documento legal (contrato) */
.legal-document {
  max-width: 48rem;
  margin: 0 auto;
  font-size: 0.9375rem;
  line-height: 1.75;
  text-align: justify;
  hyphens: auto;
  color: var(--color-ink);
}

.legal-document__title {
  font-family: var(--font-display);
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  font-weight: 700;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  line-height: 1.35;
  margin: 0 0 1.25rem;
  color: var(--color-blue);
}

.legal-document h2 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  margin: 2rem 0 0.75rem;
  color: var(--color-blue);
  text-align: left;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.legal-document h2:first-of-type {
  margin-top: 0;
}

.legal-document h3 {
  font-size: 1rem;
  margin: 1.35rem 0 0.5rem;
  color: var(--color-ink);
  font-weight: 700;
  text-align: left;
}

.legal-document p {
  margin: 0 0 1rem;
}

.legal-document ul {
  margin: 0 0 1rem;
  padding-left: 1.35rem;
}

.legal-document li {
  margin-bottom: 0.45rem;
}

.legal-document li p {
  margin: 0.35rem 0 0;
}

.legal-document__cta {
  text-align: center;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}