/* ==========================================================================
   MAIN CSS — Máster Académica Landing Page
   Estilos completos (cargado de forma non-blocking)
   Mobile-First (base: 320px+)
   ========================================================================== */

/* --------------------------------------------------------------------------
   Accessibility — WCAG 2.1 AA Focus & Skip Link
   -------------------------------------------------------------------------- */

/* Skip-to-content link: hidden until focused via keyboard */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--color-black);
  color: var(--color-white);
  padding: 0.75rem 1.5rem;
  font-weight: 700;
  font-size: 1rem;
  z-index: 10000;
  text-decoration: underline;
  transition: top 200ms ease-in-out;
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
}

/* Focus-visible styles — keyboard navigation indicator (≥ 3:1 contrast) */
:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
}

/* Buttons: dark outline for better contrast on colored backgrounds */
.btn:focus-visible {
  outline: 3px solid var(--color-black);
  outline-offset: 3px;
}

/* Header links: gold focus ring */
.header__menu a:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Floating WhatsApp: visible focus ring */
.floating-whatsapp:focus-visible {
  outline: 3px solid var(--color-black);
  outline-offset: 4px;
}

/* Footer links */
.footer__phone:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Header Navigation — Mobile-First
   -------------------------------------------------------------------------- */
.header__logo img {
  height: 40px;
  width: auto;
}

.header__nav {
  display: none;
}

.header__nav.is-open {
  display: flex;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background-color: var(--color-white);
  flex-direction: column;
  box-shadow: 0 4px 8px rgb(0 0 0 / 10%);
  padding: 1rem;
  z-index: 999;
}

.header__menu {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.header__menu a {
  padding: 0.75rem 1rem;
  min-height: 48px;
  display: flex;
  align-items: center;
  font-weight: 600;
  color: var(--color-black);
  transition: color var(--transition-base);
}

.header__menu a:hover {
  color: var(--color-red);
}

/* --------------------------------------------------------------------------
   Header Actions — Hidden on mobile
   -------------------------------------------------------------------------- */
.header__actions {
  display: none;
  align-items: center;
  gap: 1rem;
}

.header__phone {
  font-size: max(14px, 0.875rem);
  font-weight: 600;
  white-space: nowrap;
  color: var(--color-black);
  transition: color var(--transition-base);
}

.header__phone:hover {
  color: var(--color-red);
}

/* --------------------------------------------------------------------------
   Hamburger Button — Visible on mobile, hidden on desktop
   -------------------------------------------------------------------------- */
.header__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 48px;
  height: 48px;
  min-width: 48px;
  min-height: 48px;
  padding: 8px;
  cursor: pointer;
  background: none;
  border: none;
}

.header__hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-black);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* --------------------------------------------------------------------------
   Buttons — Base & Variants
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  font-weight: 700;
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: 1.2;
  border: none;
  border-radius: var(--radius-btn);
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  transition: background-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.btn--secondary {
  background-color: var(--color-red);
  color: var(--color-white);
  box-shadow: var(--shadow-btn-secondary);
}

.btn--secondary:hover {
  background-color: var(--color-red-hover);
  transform: translateY(-2px);
}

.btn--sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

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

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #1A1A1A 0%, #3D0F0F 30%, #C0392B 50%, #3D0F0F 70%, #1A1A1A 100%);
  opacity: 0.85;
  z-index: 1;
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  padding: 2rem 1rem;
  width: 100%;
}

.hero__logo {
  display: block;
  max-width: 280px;
  width: 60%;
  height: auto;
  margin: 0 auto 1.5rem;
  border-radius: 8px;
}

.hero__title {
  font-size: var(--font-size-h1);
  color: var(--color-white);
  margin-bottom: 1rem;
  text-transform: uppercase;
  text-shadow: 0 2px 4px rgb(0 0 0 / 30%);
  overflow-wrap: break-word;
  word-break: normal;
}

.hero__subtitle {
  font-size: var(--font-size-body);
  color: var(--color-white);
  margin-bottom: 2rem;
  opacity: 0.95;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Button — Primary (WhatsApp CTA)
   -------------------------------------------------------------------------- */
.btn--primary {
  min-width: min(280px, 100%);
  min-height: 48px;
  padding: 0.875rem 2rem;
  background-color: var(--color-whatsapp);
  color: var(--color-white);
  box-shadow: var(--shadow-btn-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn--primary:hover {
  background-color: var(--color-whatsapp-hover);
  transform: translateY(-2px);
}

.btn--lg {
  padding: 1rem 2.5rem;
  font-size: 1.0625rem;
}

/* --------------------------------------------------------------------------
   Desktop Breakpoint (≥ 768px)
   -------------------------------------------------------------------------- */
@media (width >= 768px) {
  /* Show nav inline */
  .header__nav {
    display: flex;
    position: static;
    background-color: transparent;
    box-shadow: none;
    padding: 0;
    flex-direction: row;
  }

  .header__menu {
    flex-direction: row;
    gap: 1.5rem;
  }

  /* Show actions */
  .header__actions {
    display: flex;
    align-items: center;
    gap: 1rem;
  }

  /* Hide hamburger */
  .header__hamburger {
    display: none;
  }
}


/* --------------------------------------------------------------------------
   About Section — Quiénes Somos
   -------------------------------------------------------------------------- */
.about {
  padding: var(--spacing-section) 0;
  text-align: center;
}

.about__container {
  max-width: 720px;
}

.about__title {
  color: var(--color-red);
  margin-bottom: 1.5rem;
}

.about__highlight {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 2rem;
}

.about__years {
  font-size: clamp(3rem, 2.5rem + 2.5vw, 5rem);
  font-weight: 700;
  color: var(--color-red);
  line-height: 1;
}

.about__years-label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-black);
  margin-top: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.about__text {
  font-size: var(--font-size-body);
  line-height: 1.8;
  color: var(--color-black);
}


/* --------------------------------------------------------------------------
   Services Section — Card Grid
   -------------------------------------------------------------------------- */
.services {
  padding: var(--spacing-section) 0;
  background-color: var(--color-gray-light);
}

.services__title {
  text-align: center;
  color: var(--color-red);
  margin-bottom: 2.5rem;
}

.services__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.services__card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: var(--card-padding);
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.services__card--featured {
  border: 2px solid var(--color-red);
  padding: var(--card-padding-featured);
  position: relative;
  box-shadow: var(--shadow-featured);
}

.services__card--featured::before {
  content: "★ Servicio Principal";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-red);
  color: var(--color-white);
  font-size: var(--font-size-label);
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 12px;
  white-space: nowrap;
  max-width: calc(100% - 2rem);
  overflow: hidden;
  text-overflow: ellipsis;
}

.services__card-icon {
  width: var(--icon-service-size);
  height: var(--icon-service-size);
  margin: 0 auto 1rem;
}

.services__card-title {
  color: var(--color-black);
  margin-bottom: 0.75rem;
}

.services__card-description {
  color: var(--color-black);
  line-height: 1.6;
  opacity: 0.85;
}

/* Tablet: 2 columns */
@media (width >= 768px) {
  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Desktop: 3 columns */
@media (width >= 1024px) {
  .services__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}


/* --------------------------------------------------------------------------
   Humanization Section — Servicio de Humanización de Tesis
   -------------------------------------------------------------------------- */
.humanization {
  padding: var(--spacing-section) 0;
  background-color: var(--color-white);
  border-top: 3px solid var(--color-red);
}

.humanization__container {
  max-width: var(--container-max);
}

.humanization__header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.humanization__title {
  color: var(--color-red);
  margin-bottom: 1rem;
}

.humanization__highlight {
  color: var(--color-red);
}

.humanization__subtitle {
  font-size: var(--font-size-body);
  line-height: 1.7;
  max-width: 650px;
  margin-inline: auto;
  color: var(--color-black);
}

.humanization__subtitle strong {
  color: var(--color-red);
}

/* Layout */
.humanization__layout {
  max-width: 700px;
  margin-inline: auto;
}

.humanization__col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

/* Feature list */
.humanization__features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.humanization__feature-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--color-gray-light);
  border-left: 3px solid var(--color-red);
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
  padding: 1rem 1.25rem;
  font-size: 1rem;
  line-height: 1.4;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.humanization__feature-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-card);
}

.humanization__feature-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-circle);
  background: var(--color-red);
  color: var(--color-white);
  font-weight: 700;
  font-size: 0.875rem;
  flex-shrink: 0;
}

/* Trust badges */
.humanization__trust {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.humanization__trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--color-gray-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-badge);
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-black);
}

/* CTA */
.humanization__cta {
  align-self: center;
}

/* Tablet */
@media (width >= 768px) {
  .humanization__features {
    max-width: 100%;
  }

  .humanization__trust {
    justify-content: center;
  }
}


/* --------------------------------------------------------------------------
   Success Cases — Carousel
   -------------------------------------------------------------------------- */
.success {
  padding: var(--spacing-section) 0;
  background-color: var(--color-gray-light);
}

.success__title {
  text-align: center;
  color: var(--color-red);
  margin-bottom: 0.5rem;
}

.success__subtitle {
  text-align: center;
  color: var(--color-black);
  opacity: 0.8;
  margin-bottom: 2.5rem;
}

.success__carousel {
  position: relative;
  max-width: 400px;
  height: 500px;
  margin-inline: auto;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.success__track {
  display: flex;
  transition: transform 400ms ease-in-out;
  height: 100%;
}

.success__slide {
  min-width: 100%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-white);
}

.success__slide img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
}

.success__btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  min-width: 48px;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgb(0 0 0 / 50%);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-circle);
  font-size: 1.5rem;
  cursor: pointer;
  transition: background var(--transition-base);
  z-index: 2;
}

.success__btn:hover {
  background: rgb(0 0 0 / 70%);
}

.success__btn--prev {
  left: 0.75rem;
}

.success__btn--next {
  right: 0.75rem;
}

.success__dots {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.5rem;
  z-index: 2;
}

.success__dot {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-circle);
  border: 2px solid var(--color-white);
  background: transparent;
  cursor: pointer;
  transition: background var(--transition-base);
}

.success__dot--active {
  background: var(--color-white);
}


/* --------------------------------------------------------------------------
   Success Cases — Carousel (styles)
   -------------------------------------------------------------------------- */

.success__track {
  display: flex;
  transition: transform 400ms ease-in-out;
}

.success__slide {
  min-width: 100%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-white);
}

.success__slide img {
  width: 100%;
  height: auto;
  display: block;
}

.success__btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  min-width: 48px;
  min-height: 48px;
  background: rgb(0 0 0 / 50%);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-circle);
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-base);
  z-index: 2;
}

.success__btn:hover {
  background: rgb(0 0 0 / 70%);
}

.success__btn--prev {
  left: 12px;
}

.success__btn--next {
  right: 12px;
}

.success__dots {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.5rem;
  z-index: 2;
}

.success__dot {
  width: 12px;
  height: 12px;
  min-width: 12px;
  min-height: 12px;
  border-radius: var(--radius-circle);
  background: rgb(255 255 255 / 50%);
  border: 2px solid var(--color-white);
  cursor: pointer;
  transition: background var(--transition-base);
}

.success__dot--active {
  background: var(--color-red);
}

.success__featured {
  margin-top: 2.5rem;
  display: flex;
  justify-content: center;
}

.success__featured-img {
  width: 100%;
  max-width: 600px;
  height: auto;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}


/* --------------------------------------------------------------------------
   Standards Section — Banner con Badges de Normativas
   -------------------------------------------------------------------------- */
.standards {
  background-color: var(--color-red);
  color: var(--color-white);
  padding: var(--spacing-section) 0;
  text-align: center;
}

.standards__title {
  color: var(--color-white);
  margin-bottom: 0.5rem;
}

.standards__subtitle {
  opacity: 0.9;
  margin-bottom: 2rem;
  max-width: 600px;
  margin-inline: auto;
}

.standards__badges {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.standards__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgb(0 0 0 / 20%);
  border: 1px solid rgb(255 255 255 / 60%);
  border-radius: var(--radius-badge);
  padding: 0.5rem 1.25rem;
  font-size: var(--font-size-badge);
  font-weight: 600;
  width: 100%;
  max-width: 280px;
  transition: background var(--transition-base);
}

.standards__badge:hover {
  background: rgb(0 0 0 / 30%);
}

@media (width >= 768px) {
  .standards__badges {
    flex-flow: row wrap;
    justify-content: center;
  }

  .standards__badge {
    width: auto;
    max-width: none;
  }
}


/* --------------------------------------------------------------------------
   Universities Section — Circular Grid
   -------------------------------------------------------------------------- */
.universities {
  padding: var(--spacing-section) 0;
  overflow: hidden;
}

.universities__title {
  text-align: center;
  color: var(--color-red);
  margin-bottom: 2.5rem;
}

.universities__grid {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  gap: 1rem;
  padding-bottom: 1rem;
  -webkit-overflow-scrolling: touch;
  max-width: 100%;
}

.universities__item {
  flex-shrink: 0;
  scroll-snap-align: center;
  width: 80px;
  height: 80px;
  border-radius: var(--radius-circle);
  background: var(--color-white);
  box-shadow: var(--shadow-university);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.universities__item:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-university-hover);
}

.universities__item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: var(--radius-circle);
}

/* Tablet: grid layout */
@media (width >= 768px) {
  .universities__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
    overflow-x: visible;
    scroll-snap-type: none;
    gap: 1.5rem;
    justify-items: center;
  }

  .universities__item {
    width: var(--university-circle-size);
    height: var(--university-circle-size);
  }
}

/* Desktop: larger circles */
@media (width >= 1024px) {
  .universities__grid {
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  }
}


/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  background-color: var(--color-black);
  color: var(--color-white);
  padding: var(--spacing-section) 0 2rem;
  text-align: center;
}

.footer__contact {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.footer__phone {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-white);
  transition: color var(--transition-base);
}

.footer__phone:hover {
  color: var(--color-gold);
}

.footer__info {
  opacity: 0.7;
  font-size: 0.875rem;
}

.footer__social {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.footer__social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  min-width: 48px;
  min-height: 48px;
  color: var(--color-white);
  border: 1px solid rgb(255 255 255 / 30%);
  border-radius: var(--radius-circle);
  transition: color var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

.footer__social-link:hover {
  color: var(--color-gold);
  border-color: var(--color-gold);
  transform: scale(1.1);
}

.footer__copyright {
  margin-bottom: 0.25rem;
}

@media (width >= 768px) {
  .footer__contact {
    flex-direction: row;
    justify-content: center;
    gap: 2rem;
  }
}


/* --------------------------------------------------------------------------
   Floating WhatsApp Widget
   -------------------------------------------------------------------------- */
.floating-whatsapp {
  position: fixed;
  bottom: 16px;
  right: 16px;
  z-index: 9999;
  width: 56px;
  height: 56px;
  min-width: 48px;
  min-height: 48px;
  background-color: var(--color-whatsapp);
  border-radius: var(--radius-circle);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgb(26 143 69 / 40%);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.floating-whatsapp:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgb(26 143 69 / 50%);
}

/* Ensure it doesn't overlap main CTAs on very small screens */
@media (width <= 479px) {
  .floating-whatsapp {
    bottom: 12px;
    right: 12px;
    width: 48px;
    height: 48px;
  }
}