/* Layout & Grid System */
.sca-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--sca-space-md);
}

@container (min-width: 768px) {
  .sca-container {
    padding: 0 var(--sca-space-lg);
  }
}

.sca-grid {
  display: grid;
  gap: var(--sca-space-lg);
}

.sca-grid--2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.sca-grid--3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.sca-grid--4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.sca-flex {
  display: flex;
  gap: var(--sca-space-md);
}

.sca-flex--center {
  align-items: center;
  justify-content: center;
}

.sca-flex--between {
  align-items: center;
  justify-content: space-between;
}

.sca-flex--column {
  flex-direction: column;
}

.sca-flex--wrap {
  flex-wrap: wrap;
}

/* Header Layout */
.sca-header {
  position: sticky;
  top: 0;
  background: var(--sca-surface);
  border-bottom: 1px solid var(--sca-border);
  z-index: 100;
  backdrop-filter: blur(10px);
}

.sca-header__inner {
  display: flex;
  flex-direction: row !important;
  align-items: center;
  justify-content: space-between;
  padding: var(--sca-space-md) 0;
  min-height: 70px;
}

/* Main Layout */
.sca-main {
  min-height: calc(100vh - 140px);
}

.sca-section {
  padding: var(--sca-space-2xl) 0;
}

.sca-section--hero {
  padding: clamp(3rem, 8vw, 6rem) 0;
  background: linear-gradient(135deg, var(--sca-surface) 0%, rgba(44, 90, 160, 0.05) 100%);
}

.sca-section--alt {
  background: rgba(107, 114, 128, 0.03);
}

/* Footer Layout */
.sca-footer {
  background: var(--sca-ink);
  color: var(--sca-surface);
  padding: var(--sca-space-2xl) 0 var(--sca-space-lg);
  margin-top: auto;
}

/* Footer centering helper -- used when .sca-footer--center is applied */
.sca-footer--center .sca-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--sca-space-md);
}

.sca-footer--center .sca-footer__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sca-space-md);
}

.sca-footer--center .sca-footer__brand {
  display: flex;
  gap: var(--sca-space-sm);
  align-items: center;
  justify-content: center;
}

.sca-footer--center .sca-footer__links {
  display: flex;
  gap: var(--sca-space-md);
  justify-content: center;
}

/* Responsive Utilities */
@media (max-width: 767px) {
  .sca-hide-mobile {
    display: none;
  }

  .sca-flex--mobile-column {
    flex-direction: column;
  }
}

@media (min-width: 768px) {
  .sca-hide-desktop {
    display: none;
  }
}

/* Container Queries */
@container (min-width: 400px) {
  .sca-card {
    padding: var(--sca-space-lg);
  }
}

@container (min-width: 600px) {
  .sca-hero__content {
    max-width: 60%;
  }
}

.sca-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 101;
}

@media (max-width: 767px) {
  .sca-nav-toggle {
    display: block;
  }

  .sca-nav {
    display: block;
    visibility: hidden;
    opacity: 0;
    transform: translateY(-0.5em);
    transition: visibility 0.2s, opacity 0.2s, transform 0.2s;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--sca-surface);
    border-bottom: 1px solid var(--sca-border);
    padding: var(--sca-space-lg);
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  }

  .sca-nav.is-open {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }

  .sca-nav .sca-nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sca-space-md);
  }

  .sca-header__controls {
    display: none;
  }
}

@media (min-width: 768px) {
  .sca-nav-toggle {
    display: none !important;
  }
  .sca-nav {
    display: block !important;
    visibility: visible;
    opacity: 1;
    transform: none;
    position: static;
    border: none;
    box-shadow: none;
    padding: 0;
    background: none;
  }
}