/* ===========================================================
   REFINED HYBRID TRAINING — LAYOUT
   =========================================================== */

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

section {
  scroll-margin-top: calc(var(--header-height) + 12px);
}

.section {
  padding-block: var(--space-8);
}

.section--tight {
  padding-block: var(--space-7);
}

.section--onyx {
  background: var(--bg-dark);
}

.section--onyx-soft {
  background: var(--bg-dark-soft);
}

.section--bone {
  background: var(--bg-light);
  color: var(--text-on-light);
}

.section--band {
  background: linear-gradient(120deg, var(--color-onyx) 0%, var(--color-onyx-soft) 100%);
  border-top: 1px solid var(--border-on-dark);
  border-bottom: 1px solid var(--border-on-dark);
}

.section-head {
  max-width: 46rem;
  margin-bottom: var(--space-6);
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

/* ---- Header / Nav ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: rgba(11, 11, 12, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-on-dark);
  transition: background var(--transition-base);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  width: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  height: 34px;
}

.site-header .brand-logo {
  height: 42px;
}

.brand-logo img {
  height: 100%;
  width: auto;
}

.main-nav {
  display: none;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.main-nav a {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-on-dark-dim);
  padding-block: var(--space-2);
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.main-nav a:hover,
.main-nav a.is-active {
  color: var(--text-on-dark);
  border-color: var(--color-brass);
}

.site-header .header-cta {
  display: none;
}

.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--border-on-dark);
  border-radius: var(--radius-sm);
  color: var(--text-on-dark);
}

.nav-toggle svg {
  width: 22px;
  height: 22px;
}

.nav-toggle .icon-close {
  display: none;
}

.nav-toggle[aria-expanded="true"] .icon-open {
  display: none;
}

.nav-toggle[aria-expanded="true"] .icon-close {
  display: block;
}

.mobile-nav {
  position: fixed;
  inset: var(--header-height) 0 0 0;
  background: var(--color-onyx);
  z-index: 490;
  display: none;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--space-6) var(--container-padding) var(--space-7);
  overflow-y: auto;
}

.mobile-nav.is-open {
  display: flex;
}

.mobile-nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.mobile-nav a {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-on-dark);
}

.mobile-nav .btn {
  margin-top: var(--space-6);
  width: 100%;
  text-align: center;
}

.mobile-contact {
  margin-top: var(--space-7);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  color: var(--text-on-dark-dim);
  font-size: 0.95rem;
}

@media (min-width: 900px) {
  .main-nav {
    display: block;
  }

  .site-header .header-cta {
    display: inline-flex;
  }

  .nav-toggle {
    display: none;
  }

  .mobile-nav {
    display: none !important;
  }
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-onyx);
  border-top: 1px solid var(--border-on-dark);
  padding-block: var(--space-7) var(--space-5);
}

.footer-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
  margin-bottom: var(--space-7);
}

.footer-brand .brand-logo {
  height: 40px;
  margin-bottom: var(--space-4);
}

.footer-brand p {
  color: var(--text-on-dark-dim);
  max-width: 32ch;
}

.footer-col h4 {
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  color: var(--color-brass);
  margin-bottom: var(--space-4);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-col a,
.footer-col address {
  color: var(--text-on-dark-dim);
  font-style: normal;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--color-brass-light);
}

.footer-social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--border-on-dark);
  border-radius: 50%;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.footer-social a:hover {
  border-color: var(--color-brass);
  color: var(--color-brass);
}

.footer-social svg {
  width: 18px;
  height: 18px;
}

.footer-bottom {
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-on-dark);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  color: var(--text-on-dark-dim);
  font-size: 0.85rem;
}

@media (min-width: 600px) {
  .footer-grid {
    grid-template-columns: 1.3fr 1fr 1fr;
  }

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  }
}

/* ---- Grids ---- */
.grid {
  display: grid;
  gap: var(--space-5);
}

.grid-2 {
  grid-template-columns: 1fr;
}

.grid-3 {
  grid-template-columns: 1fr;
}

.grid-4 {
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 600px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }

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

@media (min-width: 900px) {
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ---- Two-column layout (contact page) ---- */
.split {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
  align-items: start;
}

@media (min-width: 900px) {
  .split {
    grid-template-columns: 1.1fr 0.9fr;
  }
}