/* =====================================================
   layout.css — Navbar, footer, anchor nav, grids
   ===================================================== */

/* ==================================================
   1. SITE HEADER / NAVBAR
================================================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  height: var(--navbar-height);
  background: rgba(247, 249, 252, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition:
    background var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out);
}

.site-header--scrolled {
  background: rgba(247, 249, 252, 0.97);
  box-shadow: var(--shadow-sm);
}

.site-header--dark-page {
  background: rgba(7, 27, 51, 0.92);
  border-color: rgba(255, 255, 255, 0.1);
}

.site-header--dark-page.site-header--scrolled {
  background: rgba(7, 27, 51, 0.98);
}

.site-header__inner {
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: var(--gutter);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

/* Logo */
.site-header__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.site-header__logo img,
.site-header__logo svg {
  height: 54px;
  max-height: 58px;
  width: auto;
  display: block;
  object-fit: contain;
}

/* Nav */
.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
  justify-content: center;
}

.nav-link {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-body);
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition:
    background var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}

.nav-link:hover {
  background: var(--surface-subtle);
  color: var(--text);
  text-decoration: none;
}

.nav-link--active {
  color: var(--brand-700);
  font-weight: var(--weight-semibold);
}

/* Dark nav links */
.site-header--dark-page .nav-link {
  color: rgba(255, 255, 255, 0.72);
}
.site-header--dark-page .nav-link:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

/* Header actions */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  padding: var(--space-2);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text);
  border-radius: var(--radius-xs);
  transition: background var(--duration-fast) var(--ease-out);
}

.mobile-menu-btn:hover {
  background: var(--surface-subtle);
}
.site-header--dark-page .mobile-menu-btn {
  color: #fff;
}

/* Mobile menu drawer */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  display: none;
}

.mobile-menu--open {
  display: block;
}

.mobile-menu__overlay {
  position: absolute;
  inset: 0;
  background: rgba(11, 18, 32, 0.5);
  backdrop-filter: blur(4px);
}

.mobile-menu__panel {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: min(340px, 90vw);
  background: var(--surface);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--duration-card) var(--ease-out);
}

.mobile-menu--open .mobile-menu__panel {
  transform: translateX(0);
}

.mobile-menu__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border);
}

.mobile-menu__close {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  color: var(--text-tertiary);
  border-radius: var(--radius-xs);
}

.mobile-menu__nav {
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
  gap: var(--space-1);
  flex: 1;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-body-lg);
  font-weight: var(--weight-medium);
  color: var(--text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background var(--duration-fast) var(--ease-out);
}

.mobile-nav-link:hover {
  background: var(--surface-subtle);
  text-decoration: none;
}

.mobile-menu__footer {
  padding: var(--space-6);
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* Responsive */
@media (max-width: 900px) {
  .site-header__nav {
    display: none;
  }
  .mobile-menu-btn {
    display: flex;
  }
  .site-header__actions .btn--primary {
    display: none;
  }
}

/* ==================================================
   2. ANCHOR NAV (navegación interna del programa)
================================================== */
.anchor-nav {
  position: sticky;
  top: var(--navbar-height);
  z-index: calc(var(--z-sticky) - 10);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.anchor-nav::-webkit-scrollbar {
  display: none;
}

.anchor-nav__inner {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  gap: 0;
}

.anchor-nav__item {
  display: flex;
  align-items: center;
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition:
    color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
}

.anchor-nav__item:hover {
  color: var(--brand-700);
  text-decoration: none;
}

.anchor-nav__item--active {
  color: var(--brand-700);
  font-weight: var(--weight-semibold);
  border-bottom-color: var(--brand-600);
}

/* ==================================================
   3. SITE FOOTER
================================================== */
.site-footer {
  background: var(--brand-950);
  color: rgba(255, 255, 255, 0.72);
  padding-top: var(--space-20);
  padding-bottom: var(--space-12);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

@media (max-width: 768px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
  .site-footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 480px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
  }
}

.site-footer__brand-name {
  display: flex;
  align-items: center;
  margin-bottom: var(--space-4);
}

.site-footer__brand-name img,
.site-footer__brand-name svg {
  height: 32px;
  width: auto;
}

.site-footer__tagline {
  font-size: var(--text-small);
  color: rgba(255, 255, 255, 0.5);
  line-height: var(--leading-relaxed);
  max-width: 28ch;
}

.site-footer__col-title {
  font-size: var(--text-small);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: var(--space-5);
}

.site-footer__nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.site-footer__nav a {
  font-size: var(--text-body);
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.site-footer__nav a:hover {
  color: #fff;
  text-decoration: none;
}

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.site-footer__legal {
  font-size: var(--text-small);
  color: rgba(255, 255, 255, 0.4);
}

.site-footer__social {
  display: flex;
  gap: var(--space-3);
}

.site-footer__social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-xs);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.6);
  transition:
    background var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
  text-decoration: none;
}

.site-footer__social a:hover {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  text-decoration: none;
}

/* ==================================================
   4. HERO LAYOUT (programa)
================================================== */
.program-hero {
  background: var(--gradient-hero);
  min-height: calc(100vh - var(--navbar-height));
  display: flex;
  align-items: center;
  padding-block: var(--space-20) var(--space-16);
  position: relative;
  overflow: hidden;
}

.program-hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(to bottom, transparent, var(--bg));
  pointer-events: none;
}

.program-hero__inner {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: var(--space-12);
  align-items: start;
  position: relative;
  z-index: 1;
}

@media (max-width: 1024px) {
  .program-hero__inner {
    grid-template-columns: 1fr;
  }
  .program-hero__card {
    display: none; /* En móvil se muestra el bloque resumido dentro del hero */
  }
}

.program-hero__card {
  position: sticky;
  top: calc(var(--navbar-height) + var(--space-4));
}

/* ==================================================
   5. HOME HERO
================================================== */
.home-hero {
  background: var(--gradient-hero);
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding-block: var(--space-20);
  position: relative;
  overflow: hidden;
}

.home-hero__inner {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  position: relative;
  z-index: 1;
}

@media (max-width: 900px) {
  .home-hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .home-hero__actions {
    justify-content: center;
  }
}

.home-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.home-hero__visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.home-hero__visual img {
  width: 100%;
  max-width: 520px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* Decorative glow */
.home-hero__visual::before {
  content: "";
  position: absolute;
  inset: -20%;
  background: radial-gradient(
    circle at 50% 50%,
    rgba(45, 127, 249, 0.15),
    transparent 60%
  );
  pointer-events: none;
}

/* ==================================================
   6. COURSES GRID
================================================== */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

@media (max-width: 900px) {
  .courses-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 580px) {
  .courses-grid {
    grid-template-columns: 1fr;
  }
}

/* ==================================================
   7. OUTCOMES GRID
================================================== */
.outcomes-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

@media (max-width: 900px) {
  .outcomes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .outcomes-grid {
    grid-template-columns: 1fr;
  }
}

/* ==================================================
   8. PROGRAM PAGE TWO-COL (secciones + sidebar)
================================================== */
.program-layout {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: var(--space-16);
  align-items: start;
}

@media (max-width: 1100px) {
  .program-layout {
    grid-template-columns: 1fr;
  }
  .program-sidebar {
    display: none;
  }
}

.program-main > section {
  padding-block: var(--space-16);
  border-bottom: 1px solid var(--border);
}

.program-main > section:last-child {
  border-bottom: none;
}

.program-sidebar {
  position: sticky;
  top: calc(var(--navbar-height) + 60px + var(--space-6));
  /* 60px = anchor nav height */
}

/* ==================================================
   9. CATALOG FILTERS
================================================== */
.catalog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  align-items: center;
}

.filter-btn {
  padding: var(--space-2) var(--space-4);
  border: 1.5px solid var(--border-strong);
  border-radius: var(--radius-pill);
  background: var(--surface);
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
  cursor: pointer;
  transition:
    background var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}

.filter-btn:hover {
  background: var(--brand-100);
  border-color: var(--brand-400);
  color: var(--brand-700);
}

.filter-btn--active {
  background: var(--brand-600);
  border-color: var(--brand-600);
  color: #fff;
}

.filter-btn--active:hover {
  background: var(--brand-700);
  border-color: var(--brand-700);
  color: #fff;
}

.filter-clear {
  font-size: var(--text-small);
  color: var(--text-tertiary);
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-1) var(--space-2);
  transition: color var(--duration-fast) var(--ease-out);
}

.filter-clear:hover {
  color: var(--danger);
}