/* ============================================================
   ECUWIND — styles.css
   Sitio corporativo | Energía eólica y renovables
   Paleta basada en el color de marca #009aa6
   ============================================================ */

/* ---------- 1. Variables de diseño ---------- */
:root {
  /* Color */
  --c-primary: #009aa6;        /* color de marca */
  --c-primary-dark: #00767f;   /* hover / énfasis */
  --c-primary-soft: #e0f4f5;   /* fondos suaves de acento */
  --c-ink: #10262b;            /* texto principal (azul-petróleo muy oscuro) */
  --c-ink-soft: #45606a;       /* texto secundario */
  --c-bg: #ffffff;             /* fondo base */
  --c-bg-alt: #f2f7f8;         /* secciones alternadas */
  --c-line: #d8e4e6;           /* bordes y separadores */
  --c-footer-bg: #0d2b31;      /* fondo del footer */
  --c-error: #c0392b;          /* errores de formulario */

  /* Tipografía */
  --font-base: "Open Sans", "Segoe UI", Arial, sans-serif;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.5rem;
  --fs-xl: clamp(1.75rem, 3.5vw, 2.375rem);
  --fs-hero: clamp(1.9rem, 4.5vw, 3rem);

  /* Espaciado */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4.5rem;

  /* Otros */
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 6px 24px rgba(16, 38, 43, 0.08);
  --shadow-strong: 0 10px 32px rgba(16, 38, 43, 0.14);
  --header-h: 72px;
  --container: 1180px;
  --transition: 180ms ease;
}

/* ---------- 2. Reset ligero y base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  margin: 0;
  font-family: var(--font-base);
  font-size: var(--fs-base);
  line-height: 1.65;
  color: var(--c-ink);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3 {
  line-height: 1.25;
  margin: 0 0 var(--space-2);
  font-weight: 800;
}

p {
  margin: 0 0 var(--space-2);
}

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

a {
  color: var(--c-primary-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Foco visible para navegación por teclado */
:focus-visible {
  outline: 3px solid var(--c-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

.container {
  width: min(100% - 2.5rem, var(--container));
  margin-inline: auto;
}

/* Enlace de salto */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--c-primary-dark);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  z-index: 200;
}

.skip-link:focus {
  top: 0.5rem;
}

/* ---------- 3. Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  font-weight: 700;
  font-size: var(--fs-base);
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition);
  text-decoration: none;
}

.btn:hover {
  text-decoration: none;
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--c-primary-dark);
}

.btn-ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.7);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
}

.btn-lg {
  padding: 0.85rem 1.7rem;
  font-size: var(--fs-md);
}

/* ---------- 4. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--c-line);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-link {
  color: var(--c-ink);
  font-weight: 600;
  padding: 0.4rem 0.15rem;
  border-bottom: 3px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.nav-link:hover {
  color: var(--c-primary-dark);
  text-decoration: none;
}

/* Indicador discreto de sección activa */
.nav-link.is-active {
  color: var(--c-primary-dark);
  border-bottom-color: var(--c-primary);
}

.btn-nav {
  padding: 0.55rem 1.1rem;
  font-size: var(--fs-sm);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  font-size: 1.6rem;
  line-height: 1;
  padding: 0.35rem 0.55rem;
  color: var(--c-ink);
  cursor: pointer;
}

/* ---------- 5. Hero ---------- */
.hero {
  position: relative;
  min-height: min(88vh, 720px);
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
}

.hero-media,
.hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-img {
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  /* Velo de marca: petróleo oscuro hacia el teal corporativo */
  background: linear-gradient(100deg,
              rgba(10, 34, 40, 0.9) 0%,
              rgba(10, 34, 40, 0.72) 45%,
              rgba(0, 154, 166, 0.38) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 780px;
  padding-block: var(--space-5);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #bfeef1;
  margin-bottom: var(--space-2);
}

.hero-title {
  font-size: var(--fs-hero);
  margin-bottom: var(--space-2);
}

.hero-text {
  font-size: var(--fs-md);
  color: rgba(255, 255, 255, 0.92);
  max-width: 62ch;
  margin-bottom: var(--space-3);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ---------- 6. Secciones ---------- */
.section {
  padding-block: var(--space-5);
}

.section-alt {
  background: var(--c-bg-alt);
}

.section-head {
  max-width: 760px;
  margin-bottom: var(--space-4);
}

.section-eyebrow {
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-primary-dark);
  margin-bottom: 0.35rem;
}

.section-title {
  font-size: var(--fs-xl);
}

.section-lead {
  color: var(--c-ink-soft);
  font-size: var(--fs-md);
}

/* Cabecera de sección con imagen a la izquierda */
.section-head--split {
  display: grid;
  grid-template-columns: minmax(260px, 420px) 1fr;
  gap: var(--space-4);
  align-items: center;
  max-width: none;
}

.section-media {
  margin: 0;
}

.section-media img {
  width: 100%;
  height: 100%;
  min-height: 240px;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.section-head-text {
  max-width: 680px;
}

/* ---------- 7. Tarjetas de áreas ---------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-3);
}

.card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-top: 4px solid var(--c-primary);
  border-radius: var(--radius);
  padding: var(--space-3);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-strong);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: var(--c-primary-soft);
  color: var(--c-primary-dark);
  font-size: 1.5rem;
  display: grid;
  place-items: center;
  margin-bottom: var(--space-2);
}

.card-title {
  font-size: var(--fs-lg);
  font-weight: 700;
}

.card-text {
  color: var(--c-ink-soft);
  flex: 1;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 700;
  color: var(--c-primary-dark);
}

/* ---------- 8. Tabs de servicios ---------- */
.tablist {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  border-bottom: 2px solid var(--c-line);
  margin-bottom: var(--space-3);
}

.tab {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  padding: 0.8rem 1rem;
  font: inherit;
  font-weight: 700;
  color: var(--c-ink-soft);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}

.tab:hover {
  color: var(--c-primary-dark);
}

.tab.is-active {
  color: var(--c-primary-dark);
  border-bottom-color: var(--c-primary);
}

.tabpanel-intro {
  max-width: 860px;
  color: var(--c-ink-soft);
  font-size: var(--fs-md);
  margin-bottom: var(--space-3);
}

/* ---------- 9. Acordeones ---------- */
.accordion {
  display: grid;
  gap: var(--space-1);
}

.acc-item {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.acc-heading {
  margin: 0;
}

.acc-trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
  background: none;
  border: none;
  padding: 1rem 1.2rem;
  font: inherit;
  font-size: var(--fs-md);
  font-weight: 700;
  color: var(--c-ink);
  text-align: left;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition);
}

.acc-trigger:hover {
  background: var(--c-primary-soft);
}

.acc-trigger[aria-expanded="true"] {
  color: var(--c-primary-dark);
  background: var(--c-primary-soft);
}

.acc-icon {
  flex-shrink: 0;
  transition: transform var(--transition);
}

.acc-trigger[aria-expanded="true"] .acc-icon {
  transform: rotate(45deg); /* "+" pasa a "×" */
}

.acc-panel {
  padding: var(--space-2) 1.2rem var(--space-3);
  border-top: 1px solid var(--c-line);
}

/* Listas técnicas en columnas para compactar contenido extenso */
.detail-list {
  columns: 2;
  column-gap: var(--space-4);
}

.detail-list li {
  position: relative;
  padding-left: 1.35rem;
  margin-bottom: 0.45rem;
  break-inside: avoid;
  color: var(--c-ink-soft);
}

.detail-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-primary);
}

/* ---------- 10. Capacitaciones ---------- */
.course {
  display: grid;
  grid-template-columns: minmax(280px, 420px) 1fr;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

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

.course-body {
  padding: var(--space-3) var(--space-4);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-2);
}

.course-title {
  font-size: var(--fs-lg);
  margin: 0;
}

.course-meta {
  display: grid;
  gap: 0.5rem;
  color: var(--c-ink-soft);
}

.course-meta i {
  color: var(--c-primary-dark);
  margin-right: 0.35rem;
}

.course-body .btn {
  align-self: flex-start;
}

.course-tagline {
  color: var(--c-ink-soft);
  margin: 0;
}

/* Detalle del programa (debajo de la tarjeta) */
.course-detail {
  margin-top: var(--space-4);
  display: grid;
  gap: var(--space-3);
}

.course-intro {
  color: var(--c-ink-soft);
  max-width: 72ch;
}

/* Resumen de módulos con horas */
.course-modules {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: var(--space-2);
}

.course-modules li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  font-weight: 600;
}

.course-modules i {
  color: var(--c-primary-dark);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.course-modules span {
  margin-left: auto;
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--c-primary-dark);
  background: var(--c-primary-soft);
  border-radius: 999px;
  padding: 0.15rem 0.6rem;
  white-space: nowrap;
}

/* Párrafos dentro de los paneles del programa */
.course-detail .acc-panel p {
  color: var(--c-ink-soft);
  margin-bottom: var(--space-2);
}

.course-detail .acc-panel p:last-child {
  margin-bottom: 0;
}

.course-detail .acc-panel .detail-list {
  margin-bottom: var(--space-2);
}

/* Nota final */
.course-note {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  background: var(--c-primary-soft);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
}

.course-note i {
  color: var(--c-primary-dark);
  font-size: 1.15rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.course-note p {
  margin: 0;
  color: var(--c-ink-soft);
  font-size: var(--fs-sm);
}

/* ---------- 11. Contacto ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: var(--space-4);
  align-items: start;
}

.contact-list {
  display: grid;
  gap: var(--space-3);
}

.contact-list li {
  display: flex;
  gap: var(--space-2);
  align-items: flex-start;
}

.contact-ico {
  font-size: 1.4rem;
  color: var(--c-primary-dark);
  background: var(--c-primary-soft);
  border-radius: var(--radius-sm);
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.contact-label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--c-ink);
}

/* ---------- 12. Formulario ---------- */
.contact-form {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: var(--space-4);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
}

.form-field {
  margin-bottom: var(--space-2);
}

.form-field label {
  display: block;
  font-weight: 700;
  margin-bottom: 0.35rem;
  font-size: var(--fs-sm);
}

.req {
  color: var(--c-primary-dark);
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1.5px solid var(--c-line);
  border-radius: var(--radius-sm);
  font: inherit;
  color: var(--c-ink);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-field textarea {
  resize: vertical;
}

/* Estado de foco de campos */
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(0, 154, 166, 0.2);
}

/* Estado de error */
.form-field input.is-invalid,
.form-field select.is-invalid,
.form-field textarea.is-invalid {
  border-color: var(--c-error);
}

.field-error {
  color: var(--c-error);
  font-size: var(--fs-sm);
  margin: 0.3rem 0 0;
}

.field-hint {
  color: var(--c-ink-soft);
  font-size: var(--fs-sm);
  margin: 0.3rem 0 0;
}

/* Honeypot: oculto para humanos, visible para bots */
.hp-field {
  position: absolute;
  left: -9999px;
  height: 1px;
  width: 1px;
  overflow: hidden;
}

.privacy-note {
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
  color: var(--c-ink-soft);
  font-size: var(--fs-sm);
  background: var(--c-primary-soft);
  border-radius: var(--radius-sm);
  padding: 0.8rem 1rem;
  margin: var(--space-2) 0;
}

.privacy-note i {
  color: var(--c-primary-dark);
  margin-top: 2px;
}

.btn-submit {
  width: 100%;
  justify-content: center;
}

/* Alertas del servidor (PHP): éxito y error */
.form-alert {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  padding: 0.9rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.form-alert i {
  margin-top: 2px;
}

.form-alert--success {
  background: #e6f6ec;
  color: #1d7a3f;
  border: 1px solid #bfe5cd;
}

.form-alert--error {
  background: #fdecea;
  color: var(--c-error);
  border: 1px solid #f2c6c2;
}

.form-status {
  margin: var(--space-2) 0 0;
  font-weight: 600;
}

.form-status.is-error {
  color: var(--c-error);
}

.form-status.is-info {
  color: var(--c-primary-dark);
}

/* ---------- 13. Footer ---------- */
.site-footer {
  background: var(--c-footer-bg);
  color: #cfe3e6;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: var(--space-4);
  padding-block: var(--space-4);
}

.footer-slogan {
  max-width: 44ch;
  color: #a8c8cd;
  margin: 0;
}

.footer-title {
  font-size: var(--fs-base);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-2);
}

.footer-nav ul,
.footer-contact ul {
  display: grid;
  gap: 0.6rem;
}

.site-footer a {
  color: #cfe3e6;
}

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

.footer-contact i {
  color: var(--c-primary);
  margin-right: 0.4rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-block: var(--space-2);
  font-size: var(--fs-sm);
  color: #8fb3b9;
}

.footer-bottom p {
  margin: 0;
}

/* ---------- 14. Responsive ---------- */
@media (max-width: 960px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .section-head--split {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .section-media img {
    min-height: 0;
    max-height: 280px;
  }

  .course {
    grid-template-columns: 1fr;
  }

  .course-media img {
    max-height: 260px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  /* Menú móvil */
  .nav-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--c-line);
    box-shadow: var(--shadow);
    display: none;
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-2);
  }

  .nav-link {
    display: block;
    padding: 0.8rem 0.5rem;
    border-bottom: 1px solid var(--c-line);
  }

  .nav-link.is-active {
    border-bottom-color: var(--c-line);
    border-left: 3px solid var(--c-primary);
    padding-left: 0.8rem;
  }

  .btn-nav {
    margin-top: var(--space-2);
    justify-content: center;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .detail-list {
    columns: 1;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: var(--space-3);
  }
}

/* ---------- 15. Accesibilidad: movimiento reducido ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .card:hover {
    transform: none;
  }
}

/* ---------- Compatibilidad con contenido editable (CMS) ---------- */
.course-intro > p:last-child,
.course-note div > p:last-child {
  margin-bottom: 0;
}