/* Onaylanan koyu Atlas ana sayfası. Yalnızca home rotasında yüklenir. */
.atlas-flow {
  --flow-dark: var(--ink);
  --blueprint: var(--flow-dark);
  --bp-dim: var(--on-dark-muted);
  --bp-text: var(--on-dark);
  --flow-overlap: 48px;
  padding-bottom: 0;
}
.atlas-flow .hero {
  --blueprint: var(--red);
  --bp-dim: var(--white);
  --bp-text: var(--white);
  min-height: 0;
  padding-top: calc(var(--header-h) + clamp(56px, 6vw, 88px));
  padding-bottom: calc(clamp(76px, 7vw, 104px) + var(--flow-overlap));
}
.atlas-flow .hero__sheet { display: none; }
.atlas-flow .hero .btn--primary,
.atlas-flow .site-header[data-over]:not(.is-solid) .site-header__bar .btn--primary { background: var(--white); color: var(--red); }
.atlas-flow .hero .btn--primary:hover,
.atlas-flow .site-header[data-over]:not(.is-solid) .site-header__bar .btn--primary:hover { background: var(--paper); color: var(--red-deep); }
.atlas-flow .hero__grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: clamp(32px, 4vw, 64px); }
.atlas-flow .hero__title { max-width: 18ch; }
.atlas-flow .hero__lead { max-width: 34em; }
.atlas-flow .hero__segs { gap: 20px; margin-top: 36px; }
.atlas-flow .hero__segs > div { flex: 1; }
.atlas-flow .hero__segs dd { font-size: var(--fs-code); }
.atlas-flow .titleblock { border: 0; background: transparent; margin-top: 10px; }
.atlas-flow .titleblock > span { border: 0; padding: 6px 10px; }
.atlas-flow .titleblock > span:first-child { display: none; }
.atlas-flow .titleblock:hover { color: var(--white); text-decoration: underline; text-underline-offset: 5px; }
.atlas-flow .board-tabs { position: relative; border: 0; border-bottom: 1px solid rgb(255 255 255 / 28%); margin-top: 18px; }
.atlas-flow .board-tabs button { border: 0; padding: 16px 6px; }
.atlas-flow .board-tabs button[aria-pressed="true"] { background: transparent; color: var(--white); box-shadow: inset 0 -2px var(--white); }
.atlas-flow .board-tabs__bar { background: var(--on-dark-muted); height: 2px; }
.atlas-flow .board-tabs.has-indicator button[aria-pressed="true"] { box-shadow: none; }
.atlas-flow .board-tabs.has-indicator .board-tabs__bar { display: none; }
.atlas-flow .board-tabs__indicator {
  position: absolute; top: 0; left: 0; height: 2px;
  background: var(--white); pointer-events: none;
  transition: transform 250ms var(--ease);
}
@media (prefers-reduced-motion: reduce) {
  .atlas-flow .board-tabs__indicator { transition: none; }
}

/* Küçük bağımsız pafta yerine bütün içeriğin paylaştığı tek yüzey. */
.flow-surface {
  position: relative;
  margin: calc(-1 * var(--flow-overlap)) 20px 0;
  background: var(--paper);
  border-radius: var(--radius) var(--radius) 0 0;
}
.flow-surface > .container, .flow-surface .section > .container { padding-inline: max(20px, calc(var(--gutter) - 20px)); }
.flow-surface .section { padding-block: 0 80px; }
.flow-surface .section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.flow-surface .section-head .h2 { font-size: var(--fs-h3); font-variation-settings: "wdth" 110; line-height: 1.15; }
.flow-products .section-head { padding-top: 24px; border-top: 1px solid var(--line); }
.flow-surface .section-head__side { display: contents; }
.flow-surface .link-arrow { color: var(--ink); }
.flow-surface #projeler { padding-bottom: clamp(64px, 7vw, 104px); }
.flow-surface .refs { margin-top: 48px; padding-top: 32px; }
.flow-surface .refs__title { font-size: var(--fs-lead); font-weight: 650; }
.flow-surface .refs__ph { background: transparent; border-bottom: 1px solid var(--line); }

/* Teklif, servis ve iletişim aynı koyu zeminde sona erer. */
.atlas-flow .duo { background: var(--flow-dark); }
.atlas-flow .duo__half { padding-top: 64px; padding-bottom: 40px; }
.atlas-flow .duo__tel { padding-block: 22px 32px; }
.atlas-flow .duo__tel a { border-bottom: 1px solid var(--on-dark-muted); }
.atlas-flow .site-footer > .container { border-top: 1px solid rgb(255 255 255 / 22%); }

.bridge-study { padding-block: clamp(56px, 6vw, 80px) 48px; scroll-margin-top: 80px; }

.bridge-option h2 { font-size: var(--fs-h2); font-weight: 800; line-height: 1.08; letter-spacing: -.03em; font-variation-settings: "wdth" 115; }
.bridge-option h3 { font-size: 1.25rem; font-weight: 700; line-height: 1.25; letter-spacing: -.015em; }
.bridge-option p { color: var(--graphite); line-height: 1.65; font-size: var(--fs-body); max-width: 40ch; margin-top: 12px; }

/* A: Başlıklara eşlik eden küçük, tek renkli ikonlar. */
.bridge-studies { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(32px, 5vw, 80px); margin-top: 40px; }
.bridge-study-item { display: grid; grid-template-columns: 24px minmax(0, 1fr); gap: 0 12px; align-content: start; }
.bridge-study-item .bridge-art { width: 24px; height: 24px; margin-top: 1px; color: var(--graphite); }
.bridge-study-item h3 { font-size: 1.125rem; line-height: 1.4; }
.bridge-study-item p { grid-column: 2; max-width: 36ch; margin-top: 8px; }

@media (max-width: 1023px) {
  .atlas-flow .hero__grid { grid-template-columns: 1fr; }
  .atlas-flow .hero__copy { max-width: 700px; }
  .atlas-flow .hero__title { max-width: 17ch; }
  .atlas-flow .hero__figure { max-width: 720px; width: 100%; margin-inline: auto; }
  .atlas-flow .hero { padding-top: calc(var(--header-h) + 44px); }
  .bridge-studies { gap: 24px; }
}
@media (max-width: 650px) {
  .bridge-study { padding-block: 40px 32px; }
  .bridge-option h3 { font-size: 1.125rem; }
  .bridge-studies { grid-template-columns: 1fr; gap: 28px; margin-top: 32px; }
  .bridge-study-item p { grid-column: 2; font-size: var(--fs-small); margin-top: 8px; }
}
@media (max-width: 600px) {
  .atlas-flow { --flow-overlap: 24px; }
  .flow-surface { margin-inline: 8px; }
  .flow-surface > .container, .flow-surface .section > .container { padding-inline: 10px; }
  .atlas-flow .hero { padding-bottom: 64px; }
  .atlas-flow .hero__segs { gap: 12px; }
  .atlas-flow .hero__segs dd { font-size: .75rem; }
  .atlas-flow .board-tabs button:nth-child(-n+2) { border: 0; }
  .flow-surface .section { padding-bottom: 56px; }
  .flow-surface .section-head { flex-wrap: wrap; gap: 12px; margin-bottom: 22px; }
  .flow-surface .section-head .h2 { font-size: 1.625rem; }
  .atlas-flow .duo__half { padding-block: 40px; }
}
.hero__catalog-image { display: block; }
.hero__catalog-image img { display: block; width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; }