/* css/layout.css — Grid, Containers, Navigation, Footer */

/* ============ CONTAINERS ============ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--narrow { max-width: var(--container-narrow); }
.container--wide { max-width: var(--container-wide); }

/* ============ SECTIONS ============ */
.section { padding-block: var(--space-3xl); }
.section--hero {
  padding-block: 0;
  position: relative;
  overflow: hidden;
  min-height: 100dvh;
}

/* ============ GRID ============ */
.grid { display: grid; gap: var(--space-lg); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
}

/* ============ HEADER ============ */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-sticky);
  background: rgba(5, 5, 8, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background var(--duration-normal) var(--ease-out);
}

.header--scrolled {
  background: rgba(5, 5, 8, 0.95);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.header__logo {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.03em;
}
.header__logo span { color: var(--accent-green); }

/* ============ NAV ============ */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding-block: var(--space-xs);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: var(--weight-medium);
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--accent-green);
  transition: width var(--duration-normal) var(--ease-out);
}

.nav__link:hover { color: var(--text-primary); }
.nav__link:hover::after { width: 100%; }
.nav__link--active { color: var(--accent-green); }
.nav__link--active::after { width: 100%; background: var(--accent-green); }

.nav__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  font-size: var(--text-sm);
  padding: var(--space-sm) var(--space-lg);
  background: var(--accent-terra);
  color: var(--bg-primary);
  border-radius: var(--radius-full);
  font-weight: var(--weight-semibold);
  text-decoration: none;
  transition: background var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out);
}
.nav__cta:hover {
  background: var(--accent-terra-dim);
  color: var(--text-primary);
  transform: translateY(-1px);
}

/* ============ MOBILE MENU ============ */
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  width: 44px;
  height: 44px;
  padding: 0;
}

.menu-toggle__bar {
  display: block;
  width: 24px; height: 2px;
  background: var(--text-primary);
  margin-block: 5px;
  transition: transform var(--duration-normal) var(--ease-out),
              opacity var(--duration-fast);
  transform-origin: center;
}

@media (max-width: 768px) {
  .menu-toggle { display: block; }

  .nav {
    position: fixed;
    inset: 64px 0 0 0;
    height: calc(100dvh - 64px);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: var(--space-2xl);
    gap: var(--space-xl);
    background: var(--bg-primary);
    z-index: var(--z-overlay);
    transform: translateX(100%);
    visibility: hidden;
    transition: transform var(--duration-normal) var(--ease-out),
                visibility 0s var(--duration-normal);
    overflow-y: auto;
  }
  .nav--open { transform: translateX(0); visibility: visible; transition: transform var(--duration-normal) var(--ease-out), visibility 0s; }
  .nav__link,
  .nav__cta {
    width: min(100%, 20rem);
    justify-content: center;
  }
  .nav__link { font-size: var(--text-xl); }

  .menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(2) {
    opacity: 0;
  }
  .menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
}

/* ============ FOOTER ============ */
.footer {
  border-top: 1px solid var(--border);
  padding-block: var(--space-2xl);
  background: var(--bg-surface);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-xl);
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.footer__brand { max-width: 300px; }

.footer__brand-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-sm);
}

.footer__brand-desc {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.footer__links {
  display: flex;
  gap: var(--space-2xl);
}

.footer__col-title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.footer__col a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding-block: var(--space-xs);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  margin-bottom: 0;
}
.footer__col a:hover { color: var(--accent-green); }

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.footer__copy {
  color: var(--text-muted);
  font-size: var(--text-xs);
}

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

.footer__social-link {
  color: var(--text-muted);
  transition: color var(--duration-fast) var(--ease-out);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
}
.footer__social-link:hover {
  color: var(--accent-green);
  border-color: var(--accent-green-dim);
}

@media (max-width: 768px) {
  .footer__inner { flex-direction: column; }
  .footer__links { flex-direction: column; gap: var(--space-xl); }
  .footer__bottom { flex-direction: column; gap: var(--space-md); text-align: center; }
}