/* ==========================================================================
   Nexio Institute — hoja de estilos compartida
   Usada por: index.html, catalogo.html, curso.html, privacidad.html,
   terminos.html, 404.html
   ========================================================================== */

/* ---------- Reset / normalize minimo ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd {
  margin: 0;
}

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

img, picture, svg, video {
  display: block;
  max-width: 100%;
  height: auto;
}

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

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

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

/* ---------- Variables de marca ---------- */
:root {
  --navy-dark: #0A102A;
  --navy: #1B2440;
  --navy-mid: #2F4F7E;
  --teal: #4FC3D6;
  --slate: #64809A;
  --bg-light: #F7FAFC;
  --text: #1B2440;

  /* derivados de uso frecuente, para no repetir rgba() sueltos por todo el archivo */
  --teal-soft: rgba(79, 195, 214, 0.12);
  --navy-soft: rgba(27, 36, 64, 0.06);
  --border-color: rgba(27, 36, 64, 0.12);
  --shadow-card: 0 4px 14px rgba(10, 16, 42, 0.08);
  --shadow-card-hover: 0 10px 28px rgba(10, 16, 42, 0.14);
  --radius: 12px;
  --radius-sm: 8px;
  --max-width: 1140px;

  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  background: var(--bg-light);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 20px;
}

h1, h2, h3, h4 {
  color: var(--navy);
  line-height: 1.2;
  font-weight: 700;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.6rem; }
h3 { font-size: 1.25rem; }

p { color: var(--text); }

.text-muted {
  color: var(--slate);
}

/* ---------- Utilidades de enlace ---------- */
.link-teal {
  color: var(--teal);
  font-weight: 600;
}

.link-teal:hover,
.link-teal:focus-visible {
  text-decoration: underline;
}

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--teal);
  color: var(--navy-dark);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #3fb0c4;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(79, 195, 214, 0.35);
}

.btn-secondary {
  background: transparent;
  color: var(--navy);
  border: 1.5px solid var(--navy);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: var(--navy);
  color: #fff;
}

.btn-block {
  width: 100%;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1.05rem;
}

/* Botones reales deshabilitados (atributo disabled/aria-disabled nativo).
   .btn-disabled (usado como <span> suelto en el header) tiene su propia
   regla completa mas abajo, junto al resto de clases del header. */
.btn[disabled],
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ---------- Badge "Proximamente" ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  line-height: 1.6;
}

.badge-proximamente {
  background: var(--teal-soft);
  color: var(--navy-mid);
  border: 1px solid rgba(79, 195, 214, 0.4);
}

.badge-categoria {
  background: var(--navy-soft);
  color: var(--navy);
}

.badge-nivel {
  background: var(--teal-soft);
  color: var(--navy-mid);
  border: 1px solid rgba(79, 195, 214, 0.35);
}

/* ---------- Header / navegacion ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: #fff;
  border-bottom: 1px solid var(--border-color);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-block: 14px;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-mark {
  width: 36px;
  height: 36px;
}

.logo-mark-sm {
  width: 24px;
  height: 24px;
}

.brand-wordmark {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--navy);
}

.brand-subtitle {
  display: block;
  font-size: 0.62rem;
  font-weight: 600;
  color: var(--slate);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
}

.site-nav a {
  font-weight: 600;
  color: var(--navy);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--teal);
}

.header-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

/* Boton/enlace deshabilitado usado suelto como <span> en el header (login,
   registro, panel de instructor) para login/registro/panel que todavia no
   existen en Fase 1. Autocontenido: no depende de combinarse con .btn. */
.btn-disabled {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border-color);
  color: var(--slate);
  font-weight: 600;
  font-size: 0.85rem;
  opacity: 0.75;
  cursor: not-allowed;
}

.badge-soon {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  margin-left: 6px;
  border-radius: 999px;
  background: var(--teal);
  color: var(--navy-dark);
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.badge-soon-lg {
  margin-left: 0;
  padding: 6px 16px;
  font-size: 0.78rem;
}

@media (max-width: 640px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 55%, var(--navy-mid) 100%);
  color: #fff;
  padding-block: 56px;
}

.hero .container {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-eyebrow {
  display: inline-flex;
  align-self: flex-start;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(79, 195, 214, 0.15);
  border: 1px solid rgba(79, 195, 214, 0.4);
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero h1 {
  color: #fff;
  font-size: 2.1rem;
}

.hero p {
  color: rgba(255, 255, 255, 0.82);
  font-size: 1.05rem;
  max-width: 60ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

.hero .btn-secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
}

.hero .btn-secondary:hover {
  background: #fff;
  color: var(--navy);
}

/* ---------- Seccion "como funciona" ---------- */
.how-it-works {
  padding-block: 56px;
}

.section-heading {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: 36px;
}

.section-heading p {
  color: var(--slate);
  margin-top: 10px;
}

.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.step-card {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  text-align: left;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--teal-soft);
  color: var(--navy-mid);
  font-weight: 800;
  margin-bottom: 12px;
}

.step-card h3 {
  margin-bottom: 6px;
}

.step-card p {
  color: var(--slate);
  font-size: 0.94rem;
}

/* ---------- Aviso de lanzamiento / para instructores (index.html) ---------- */
.launch-notice {
  padding-block: 48px;
  background: var(--teal-soft);
}

.notice-card {
  max-width: 640px;
  margin-inline: auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.for-instructors {
  padding-block: 48px;
  text-align: center;
}

.for-instructors .container {
  max-width: 640px;
}

/* ---------- Grid de cursos (catalogo) ---------- */
.courses-section {
  padding-block: 48px;
}

.courses-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 28px;
}

.course-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.course-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}

.course-card-media {
  position: relative;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--navy-mid), var(--navy-dark));
}

/* Badge "Proximamente" superpuesto sobre la miniatura del curso */
.course-card-media .badge-proximamente {
  position: absolute;
  top: 12px;
  right: 12px;
}

.course-card-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px;
  flex: 1;
}

.course-card-body h3 {
  font-size: 1.05rem;
}

.course-card-body p {
  color: var(--slate);
  font-size: 0.92rem;
}

.course-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 10px;
  font-size: 0.85rem;
  color: var(--slate);
}

.course-card-footer {
  padding: 0 18px 18px;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  padding-block: 16px;
  font-size: 0.85rem;
  color: var(--slate);
}

.breadcrumb a {
  color: var(--slate);
}

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

.breadcrumb .separator {
  margin-inline: 6px;
  color: var(--border-color);
}

.breadcrumb .current {
  color: var(--navy);
  font-weight: 600;
}

/* ---------- Layout de dos columnas: curso.html ---------- */
.course-detail {
  padding-block: 32px 64px;
}

.course-detail-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.course-detail-main {
  min-width: 0; /* evita que el contenido largo desborde el grid */
}

.course-detail-sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sidebar-card {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-card);
}

.sidebar-card h3 {
  font-size: 1rem;
  margin-bottom: 12px;
}

.course-price {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--navy);
}

.course-detail-main h2 {
  margin-top: 32px;
  margin-bottom: 12px;
}

.course-detail-main h2:first-child {
  margin-top: 0;
}

.course-detail-main ul {
  list-style: disc;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.course-detail-main ul li {
  color: var(--text);
}

/* Caja "el temario se publicara pronto" dentro de curso.html */
.content-notice {
  background: #fff;
  border-left: 4px solid var(--teal);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  color: var(--slate);
  box-shadow: var(--shadow-card);
}

.content-notice strong {
  color: var(--navy);
}

.sidebar-note {
  margin-top: 14px;
  font-size: 0.82rem;
  color: var(--slate);
  line-height: 1.5;
}

/* ---------- Estados de carga / error ---------- */
.state-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
  padding: 48px 20px;
  color: var(--slate);
}

.state-spinner {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 3px solid var(--teal-soft);
  border-top-color: var(--teal);
  animation: nexio-spin 0.8s linear infinite;
}

@keyframes nexio-spin {
  to { transform: rotate(360deg); }
}

.state-error {
  color: #b3392f;
}

/* ---------- Formularios (privacidad / terminos / contacto minimo) ---------- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.form-group label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--navy);
}

.form-group input,
.form-group textarea,
.form-group select {
  padding: 10px 12px;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: #fff;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px var(--teal-soft);
}

/* ---------- Paginas legales (privacidad / terminos) ---------- */
.legal-page {
  padding-block: 40px 64px;
}

.legal-page .container {
  max-width: 760px;
}

.legal-page h2 {
  margin-top: 32px;
  margin-bottom: 10px;
}

.legal-page p,
.legal-page li {
  color: var(--text);
  margin-bottom: 10px;
}

.legal-page ul {
  list-style: disc;
  padding-left: 20px;
}

.legal-updated {
  color: var(--slate);
  font-size: 0.85rem;
  margin-bottom: 24px;
}

/* ---------- Pagina 404 ---------- */
.error-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-block: 60px;
}

.error-page .container {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.error-code {
  font-size: 4.5rem;
  font-weight: 800;
  color: var(--teal);
  line-height: 1;
}

.error-page p {
  color: var(--slate);
  max-width: 46ch;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--navy-dark);
  color: rgba(255, 255, 255, 0.75);
  padding-block: 40px 24px;
  margin-top: 48px;
}

.footer-inner {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 14px;
}

.footer-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: #fff;
  font-weight: 800;
}

.footer-tagline {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.9rem;
  max-width: 56ch;
}

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

.footer-links a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.88rem;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--teal);
}

.footer-copyright {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.8rem;
  margin-top: 4px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 14px;
  width: 100%;
}

/* ==========================================================================
   Breakpoint escritorio
   ========================================================================== */
@media (min-width: 768px) {
  h1 { font-size: 2.75rem; }
  h2 { font-size: 2rem; }

  .hero h1 {
    font-size: 3rem;
  }

  .hero p {
    font-size: 1.15rem;
  }

  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .course-detail-grid {
    grid-template-columns: 2fr 1fr;
    align-items: start;
  }

  .course-detail-sidebar {
    position: sticky;
    top: 88px;
  }
}

@media (min-width: 1024px) {
  .courses-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ==========================================================================
   Catalogo: filtros por categoria y tarjeta de curso clicable
   ========================================================================== */
.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 8px;
}

.filter-pill {
  padding: 8px 18px;
  border-radius: 999px;
  border: 1.5px solid var(--border-color);
  background: #fff;
  color: var(--navy);
  font-weight: 600;
  font-size: 0.88rem;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.filter-pill:hover,
.filter-pill:focus-visible {
  border-color: var(--teal);
}

.filter-pill.is-active {
  background: var(--navy);
  border-color: var(--navy);
  color: #fff;
}

/* La tarjeta entera es clicable via este enlace; el boton de matricula
   queda fuera del <a> para no anidar elementos interactivos. */
.course-card-link {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}

.course-card-link:hover .course-card-body h3,
.course-card-link:focus-visible .course-card-body h3 {
  color: var(--teal);
}

.course-card-media {
  display: flex;
  align-items: center;
  justify-content: center;
}

.course-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.course-card-initials {
  color: #fff;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.course-card-price {
  color: var(--navy);
  font-weight: 700;
}

/* .state-message y .courses-grid fijan su propio "display", lo que pisa
   la regla por defecto del navegador para [hidden]. Sin esto, los
   elementos con el atributo hidden seguirian siendo visibles. */
.state-message[hidden],
.courses-grid[hidden] {
  display: none;
}

/* ---------- Empresas: grid de modalidades ---------- */
.solutions {
  padding-block: 56px;
}

.solutions-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.solution-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 26px 24px;
  box-shadow: var(--shadow-card);
}

.solution-card h3 {
  font-size: 1.1rem;
}

.solution-card p {
  color: var(--slate);
  font-size: 0.94rem;
}

.solution-tag {
  margin-top: auto;
  padding-top: 10px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--navy-mid);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* ---------- CTA banner ancho completo (empresas.html) ---------- */
.cta-banner {
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 55%, var(--navy-mid) 100%);
  color: #fff;
  padding-block: 56px;
  text-align: center;
}

.cta-banner .container {
  max-width: 640px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.cta-banner h2 {
  color: #fff;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.82);
}

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