/* ─── Body ─── */
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-neutral-800);
  background-color: var(--bg-body);
  overflow-x: hidden;
}

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

.container--narrow {
  max-width: var(--container-narrow);
}

/* ─── Sections ─── */
.section {
  padding-block: var(--space-section);
}

.section--dark {
  background: var(--gradient-dark-section);
  color: #FFFFFF;
  position: relative;
  overflow: hidden;
}

/* Subtle blue glow orbs on dark sections */
.section--dark::before {
  content: '';
  position: absolute;
  top: -20%;
  left: -10%;
  width: 50%;
  height: 60%;
  background: radial-gradient(ellipse, rgba(63, 55, 201, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.section--dark::after {
  content: '';
  position: absolute;
  bottom: -15%;
  right: -10%;
  width: 40%;
  height: 50%;
  background: radial-gradient(ellipse, rgba(76, 201, 240, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.section--dark > .container {
  position: relative;
  z-index: 1;
}

.section--alt {
  background: linear-gradient(180deg, #F8F8FD 0%, var(--color-neutral-50) 100%);
}

.section__header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 1rem;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-50);
  border: 1px solid var(--color-primary-100);
  border-radius: var(--radius-full);
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  color: var(--color-neutral-900);
  margin-top: var(--space-md);
}

.section--dark .section__title {
  color: #FFFFFF;
}

.section__subtitle {
  font-size: var(--text-lg);
  color: var(--color-neutral-500);
  margin-top: var(--space-md);
  max-width: 60ch;
  margin-inline: auto;
}

.section--dark .section__subtitle {
  color: var(--color-neutral-300);
}

/* ─── Header / Nav ─── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  padding: 1rem 0;
  transition: background var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out),
              padding var(--duration-normal) var(--ease-out);
}

.header--scrolled {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  padding: 0.625rem 0;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.header__logo img {
  height: 36px;
  width: auto;
}

.header__logo-text {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
}

.header__nav {
  display: none;
  align-items: center;
  gap: var(--space-lg);
}

.header__nav-link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-neutral-600);
  transition: color var(--duration-fast);
  white-space: nowrap;
}

.header__nav-link:hover {
  color: var(--color-primary);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.header__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  gap: 5px;
}

.header__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-neutral-700);
  border-radius: 2px;
  transition: transform var(--duration-normal) var(--ease-out),
              opacity var(--duration-fast);
}

.header__hamburger.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__hamburger.is-active span:nth-child(2) {
  opacity: 0;
}

.header__hamburger.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ─── Mobile Menu Overlay ─── */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-slow) var(--ease-out),
              visibility var(--duration-slow);
}

.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu__link {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--weight-semibold);
  color: var(--color-neutral-800);
  transition: color var(--duration-fast);
}

.mobile-menu__link:hover {
  color: var(--color-primary);
}

/* ─── Footer ─── */
.footer {
  background: var(--color-neutral-900);
  color: var(--color-neutral-300);
  padding-block: var(--space-3xl) var(--space-xl);
}

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

.footer__brand {
  max-width: 300px;
}

.footer__brand-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: var(--space-md);
}

.footer__brand-logo img {
  height: 32px;
  width: auto;
  filter: brightness(0) invert(1);
}

.footer__brand-name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: #FFFFFF;
}

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

.footer__col-title {
  font-family: var(--font-display);
  font-weight: var(--weight-semibold);
  color: #FFFFFF;
  font-size: var(--text-sm);
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__link {
  font-size: var(--text-sm);
  color: var(--color-neutral-400);
  transition: color var(--duration-fast);
}

.footer__link:hover {
  color: #FFFFFF;
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  text-align: center;
}

.footer__copyright {
  font-size: var(--text-xs);
  color: var(--color-neutral-500);
}

.footer__address {
  font-size: var(--text-xs);
  color: var(--color-neutral-500);
}

/* ─── Responsive ─── */
@media (min-width: 768px) {
  .header__nav {
    display: flex;
  }

  .header__hamburger {
    display: none;
  }

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

  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}