/* ============================================================
   layout.css — Container, Editorial-Grid, Sektions-Rhythmus
   ============================================================ */

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

/* ── Sektion ──────────────────────────────────────────── */
.section {
  position: relative;
  padding-block: var(--section-y);
  z-index: var(--z-base);
}
.section--tight { padding-block: clamp(2.5rem, 5vw, 4.5rem); }
.section--band { background: var(--paper-2); }
.section--surface { background: var(--surface); }

/* Editoriale Sektions-Kopfzeile mit Folio-Nummer */
.section-head {
  display: grid;
  gap: var(--space-4);
  max-width: 54rem;
  margin-bottom: clamp(3rem, 6vw, 5rem);
}
.section-head__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--clay);
}
.section-head__eyebrow::before {
  content: "";
  width: 1.8rem;
  height: 1px;
  background: var(--clay);
}
.section-head__title { font-size: var(--step-3); }
.section-head__lead {
  font-size: var(--step-1);
  color: var(--graphite);
  font-weight: 400;
  max-width: 46rem;
}

/* ── 12-Spalten-Grid ──────────────────────────────────── */
.grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-cols), 1fr);
  gap: var(--grid-gap);
}
.grid--gap-lg { gap: clamp(1.5rem, 4vw, 3.5rem); }

/* Span-Helfer (Desktop) */
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: 1 / -1; }

/* ── Editorial-Baseline-Grid (sichtbare Hairline-Spalten) ─ */
.ruled { position: relative; }
.ruled::before {
  content: "";
  position: absolute;
  inset-block: 0;
  inset-inline: var(--gutter);
  max-width: var(--container);
  margin-inline: auto;
  pointer-events: none;
  z-index: 0;
  background-image: repeating-linear-gradient(
    to right,
    var(--hairline-2) 0,
    var(--hairline-2) 1px,
    transparent 1px,
    transparent calc(100% / 6)
  );
  opacity: 0.6;
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 12%, #000 88%, transparent);
          mask-image: linear-gradient(to bottom, transparent, #000 12%, #000 88%, transparent);
}
.ruled > * { position: relative; z-index: 1; }

/* ── Hairline-+Clay-Tick-Divider (Signature) ──────────── */
.rule {
  position: relative;
  height: 1px;
  border: 0;
  background: var(--hairline);
  margin-block: 0;
}
.rule::after {
  content: "";
  position: absolute;
  top: -1px;
  left: calc(100% / 6 - 1px);
  width: 2px;
  height: 3px;
  background: var(--clay);
}

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 900px) {
  .col-3, .col-4, .col-5 { grid-column: span 6; }
  .col-6, .col-7, .col-8 { grid-column: 1 / -1; }
}
@media (max-width: 560px) {
  .col-3, .col-4, .col-5, .col-6 { grid-column: 1 / -1; }
  .ruled::before { display: none; }
}