/* =========================================================
   LAYOUT — Elektroservice Ernst
   Containers, grid systems, section wrappers
   ========================================================= */

/* —— Container ———————————————————————————————————————————— */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

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

.container--full {
  max-width: none;
  padding-inline: 0;
}

/* —— Grid ————————————————————————————————————————————————— */

.grid {
  display: grid;
  gap: var(--col-gap);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.grid--auto-fit-sm {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.grid--auto-fit-md {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

/* Asymmetric grids */
.grid--1-2  { grid-template-columns: 1fr 2fr; }
.grid--2-1  { grid-template-columns: 2fr 1fr; }
.grid--1-3  { grid-template-columns: 1fr 3fr; }
.grid--3-2  { grid-template-columns: 3fr 2fr; }

@media (max-width: 768px) {
  .grid--2,
  .grid--3,
  .grid--4,
  .grid--1-2,
  .grid--2-1,
  .grid--1-3,
  .grid--3-2 {
    grid-template-columns: 1fr;
  }
}

/* —— Flex helpers ————————————————————————————————————————— */

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* —— Section wrappers ————————————————————————————————————— */

.section {
  padding-block: var(--section-gap);
}

.section--sm {
  padding-block: var(--section-gap-sm);
}

.section--dark {
  background: var(--color-dark);
  color: var(--color-light-on-dark);
}

.section--dark p {
  color: rgba(245, 240, 232, 0.7);
}

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

.section--accent {
  background: var(--color-accent);
  color: #fff;
}

/* —— Header ——————————————————————————————————————————————— */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition:
    background var(--duration-slow) var(--ease-out-quart),
    box-shadow var(--duration-slow) var(--ease-out-quart),
    height var(--duration-slow) var(--ease-out-quart);
}

.site-header--transparent {
  background: transparent;
}

.site-header--scrolled {
  height: var(--header-height-scrolled);
  background: rgba(250, 248, 244, 0.95);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  box-shadow: 0 1px 0 var(--color-rule), var(--shadow-sm);
}

.site-header--dark {
  background: transparent;
}

.site-header--dark.site-header--scrolled {
  background: rgba(14, 12, 9, 0.95);
  box-shadow: 0 1px 0 var(--color-dark-rule), 0 4px 24px rgba(0,0,0,0.3);
}

.header-inner {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

/* —— Main content area ———————————————————————————————————— */

.site-main {
  padding-top: var(--header-height);
}

/* —— Footer ——————————————————————————————————————————————— */

.site-footer {
  background: var(--color-dark);
  color: var(--color-light-on-dark);
  padding-block: var(--space-20) var(--space-10);
}

/* —— Page hero generic ———————————————————————————————————— */

.page-hero {
  padding-block: clamp(var(--space-20), 15vw, var(--space-40)) var(--section-gap-sm);
  position: relative;
  overflow: hidden;
}

/* —— Divider line ————————————————————————————————————————— */

.divider {
  width: 100%;
  height: 1px;
  background: var(--color-rule);
}

.divider--accent {
  background: var(--color-accent);
  height: 2px;
  width: 48px;
}

/* —— Sticky section nav (anchor links) ———————————————————— */

.section-nav {
  position: sticky;
  top: var(--header-height-scrolled);
  z-index: var(--z-raised);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-rule);
  padding-block: var(--space-3);
  overflow-x: auto;
  scrollbar-width: none;
}

.section-nav::-webkit-scrollbar { display: none; }

.section-nav__list {
  display: flex;
  gap: var(--space-6);
  white-space: nowrap;
  align-items: center;
}

.section-nav__link {
  font-family: var(--font-ui);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  color: var(--color-ink-muted);
  padding-block: var(--space-2);
  border-bottom: 1px solid transparent;
  transition: color var(--duration-fast), border-color var(--duration-fast);
}

.section-nav__link:hover,
.section-nav__link.is-active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}