/* ==========================================================================
   Layout — Grid, Sections, Container
   ========================================================================== */

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--sp-6);
}

.container--narrow {
  max-width: var(--max-width-text);
  margin-inline: auto;
  padding-inline: var(--sp-6);
}

/* Section */
.section {
  padding-block: var(--section-py);
}

.section--alt {
  background-color: var(--color-bg-alt);
}

.section--pattern {
  background-image: url('../images/patterns/fern-pattern.svg');
  background-repeat: repeat;
  background-size: 240px 240px;
  text-align: center;
}

.section__eyebrow {
  font-family: var(--font-serif-en);
  font-size: var(--fs-xs);
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
  display: block;
  margin-bottom: var(--sp-4);
}

.section__title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  margin-bottom: var(--sp-6);
}

.section__title--en {
  font-family: var(--font-serif-en);
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: 0.06em;
}

.section__lead {
  font-size: var(--fs-md);
  color: var(--color-charcoal);
  max-width: 48ch;
  line-height: 2;
}

/* Grid */
.grid {
  display: grid;
  gap: var(--sp-8);
}

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

.about-grid {
  align-items: center;
  gap: var(--sp-16);
}
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.grid--auto {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

/* Flex utilities */
.flex { display: flex; }
.flex--center { align-items: center; justify-content: center; }
.flex--between { align-items: center; justify-content: space-between; }
.flex--gap-4 { gap: var(--sp-4); }
.flex--gap-8 { gap: var(--sp-8); }

/* Divider */
.divider {
  width: 40px;
  height: 1px;
  background-color: var(--color-gold);
  margin-block: var(--sp-8);
}

.divider--center { margin-inline: auto; }

/* Header layout */
.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 100;
  height: 72px;
  display: flex;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: var(--border-light);
  transition: box-shadow var(--duration-normal) var(--ease-default);
}

.site-header.scrolled {
  box-shadow: 0 2px 20px rgba(31, 42, 55, 0.08);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Main content offset for fixed header */
.site-main {
  margin-block-start: 72px;
}

/* Language switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-serif-en);
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  margin-inline-start: var(--sp-4);
}

.lang-switcher__link {
  color: var(--color-charcoal);
  opacity: 0.5;
  transition: opacity var(--duration-normal) var(--ease-default), color var(--duration-normal) var(--ease-default);
}

.lang-switcher__link:hover,
.lang-switcher__link.is-active {
  opacity: 1;
  color: var(--color-gold);
}

.lang-switcher__sep {
  opacity: 0.3;
  font-size: var(--fs-xs);
}

/* Footer layout */
.site-footer {
  background-color: var(--color-navy);
  color: rgba(255, 255, 255, 0.7);
  padding-block: var(--sp-16) var(--sp-8);
}

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

@media (max-width: 768px) {
  .container { padding-inline: var(--sp-4); }
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: 1fr; }
  .section { padding-block: clamp(3rem, 6vw, 5rem); }
}

@media (max-width: 480px) {
  .btn-group {
    flex-direction: column;
    align-items: stretch;
  }
  .btn-group .btn {
    justify-content: center;
  }
}