/* ═══════════════════════════════════════════
   LAYOUT — Container, Section, Grid, Header, Footer
   ═══════════════════════════════════════════ */

/* ─── Container ─── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}
.container--narrow { max-width: var(--container-narrow); }
.container--wide   { max-width: var(--container-wide); }

/* ─── Section ─── */
.section {
  min-height: var(--section-height);
  padding-block: var(--section-py);
  position: relative;
  overflow: hidden;
}
.section--alt {
  background-color: var(--color-bg-alt);
}

.section__header {
  text-align: center;
  margin-bottom: var(--space-12);
}
.section__title {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
}
.section__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin-inline: auto;
}

/* ─── Grid ─── */
.grid {
  display: grid;
  gap: var(--space-8);
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* auto-responsive: min 280px per column */
.grid-auto {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* ─── Flex helpers ─── */
.flex        { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between{ display: flex; align-items: center; justify-content: space-between; }
.flex-col    { display: flex; flex-direction: column; }
.gap-2  { gap: var(--space-2); }
.gap-4  { gap: var(--space-4); }
.gap-6  { gap: var(--space-6); }
.gap-8  { gap: var(--space-8); }

/* ─── Header ─── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  padding-block: var(--space-4);
  transition: background var(--duration-normal) var(--ease-default),
              box-shadow var(--duration-normal) var(--ease-default);
}
.header--scrolled {
  background-color: rgba(10, 14, 23, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-md);
}

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

.header__logo {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.header__logo img {
  height: 32px;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.header__link {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  transition: color var(--duration-fast) var(--ease-default);
  position: relative;
}
.header__link:hover,
.header__link--active {
  color: var(--color-text);
}
.header__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--duration-normal) var(--ease-default);
}
.header__link:hover::after,
.header__link--active::after {
  width: 100%;
}

/* ─── Dropdown nav ─── */
.header__dropdown {
  position: relative;
}

.header__dropdown-toggle {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-1);
  transition: color var(--duration-fast) var(--ease-default);
}

.header__dropdown-toggle:hover {
  color: var(--color-text);
}

.header__dropdown-toggle svg {
  width: 12px;
  height: 12px;
  transition: transform var(--duration-fast) var(--ease-default);
}

.header__dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + var(--space-3));
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2);
  min-width: 180px;
  box-shadow: var(--shadow-lg);
  z-index: var(--z-dropdown);
}

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

.header__dropdown--open .header__dropdown-toggle svg {
  transform: rotate(180deg);
}

.header__dropdown-link {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
  white-space: nowrap;
  transition: all var(--duration-fast) var(--ease-default);
}

.header__dropdown-link:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text);
}

/* Mobile menu toggle */
.header__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 24px;
  padding: 0;
}
.header__burger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--duration-normal) var(--ease-default),
              opacity var(--duration-normal) var(--ease-default);
}

/* Burger → X */
.header__burger--active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.header__burger--active span:nth-child(2) {
  opacity: 0;
}
.header__burger--active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ─── Drawer overlay ─── */
.drawer-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: calc(var(--z-header) + 1);
  backdrop-filter: blur(4px);
}
.drawer-overlay--visible {
  display: block;
}

/* ─── Footer ─── */
.footer {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-16) var(--space-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

.footer__brand-desc {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin-top: var(--space-4);
}

.footer__heading {
  font-size: var(--text-sm);
  font-weight: var(--weight-semi);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.footer__link {
  display: block;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  padding-block: var(--space-1);
  transition: color var(--duration-fast) var(--ease-default);
}
.footer__link:hover {
  color: var(--color-text);
}

.footer__bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-sm);
  color: var(--color-text-dim);
}

.footer__disclaimer {
  font-size: var(--text-xs);
  color: var(--color-text-dim);
  line-height: var(--leading-relaxed);
  max-width: 800px;
}