/* ==========================================================================
   referenzen.css — page-scoped styles for /referenzen/ (index + case studies)
   Loads on top of styles.css; reuses brand tokens (--accent, --ink, etc.).
   New components only: shrink-hero, project showcase, case-study layout.
   ========================================================================== */

:root {
  --ref-dark: #0e1316;
  --ref-dark-2: #141b1f;
  --ref-hero-scroll: 70vh;          /* extra scroll distance that drives the shrink */
}

/* keep the absolute header readable over the dark hero of these pages */
.ref-page main { position: relative; }

/* --------------------------------------------------------------------------
   1. Shrink hero (index)
   A tall scroller whose sticky stage holds the headline. referenzen.js scales
   the headline down + fades it as you scroll through .ref-hero. Mirrors the
   sticky+rAF pattern used by .gt-scrolly / .serp-scrolly in main.js.
   -------------------------------------------------------------------------- */
.ref-hero {
  position: relative;
  background: radial-gradient(120% 90% at 50% 0%, var(--ref-dark-2) 0%, var(--ref-dark) 60%);
  color: #fff;
  /* total scroll length = one viewport (sticky) + the shrink distance */
  min-height: calc(100vh + var(--ref-hero-scroll));
}

.ref-hero-sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 0 clamp(24px, 5vw, 64px);
}

.ref-hero-head {
  max-width: 1080px;
  transform-origin: center 38%;
  will-change: transform, opacity;
}

.ref-hero-eyebrow {
  font-family: "Schibsted KD", Arial, Helvetica, sans-serif;
  text-transform: uppercase;
  letter-spacing: .22em;
  font-size: .82rem;
  color: var(--accent);
  margin: 0 0 18px;
}

.ref-hero-title {
  font-family: "Schibsted KD", Arial, Helvetica, sans-serif;
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -.01em;
  font-size: clamp(2.6rem, 7vw, 5.5rem);
  margin: 0;
  color: #fff;
  text-shadow: 0 2px 28px rgba(0,0,0,.55);
}
.ref-hero-title .accent { color: var(--accent); }

.ref-hero-sub {
  margin: 22px auto 0;
  max-width: 620px;
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  color: #d6dadc;
  text-shadow: 0 1px 16px rgba(0,0,0,.6);
}

/* Projects collage behind the hero headline: a 3x3 tile grid (dimmed montage
   of past work). Oversized + centered so scroll-roll never exposes a gap. */
.ref-hero-collage {
  position: absolute;
  z-index: 0;
  --collage-range: 24%;   /* roll distance, relative to a tile's own size; safe up to ~36% before the 32% overscan can't cover the roll */
  --over: 32%;            /* total overscan; half bleeds off each edge */
  top: calc(var(--over) / -2);
  left: calc(var(--over) / -2);
  width: calc(100% + var(--over));
  height: calc(100% + var(--over));
  opacity: .7;
  pointer-events: none;
  overflow: hidden;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: clamp(8px, 1vw, 14px);
}
/* Landscape (default): columns roll vertically — col0 up, col1 down, col2 up. */
.ref-hero-collage .ctile {
  position: relative;
  overflow: hidden;
  border-radius: 10px;
  will-change: transform;
  transform: translateY(calc(var(--dy) * var(--collage-p, 0) * var(--collage-range)));
}
.ref-hero-collage .ctile picture { display: block; height: 100%; }
.ref-hero-collage .ctile img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
/* Portrait: rows roll horizontally — row0 left, row1 right, row2 left. */
@media (orientation: portrait) {
  .ref-hero-collage .ctile {
    transform: translateX(calc(var(--dx) * var(--collage-p, 0) * var(--collage-range)));
  }
}
/* dark vignette so the headline stays readable over the collage */
.ref-hero-sticky::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(58% 50% at 50% 46%, rgba(14,19,22,.55) 0%, rgba(14,19,22,0) 72%),
    linear-gradient(180deg, rgba(14,19,22,.5) 0%, rgba(14,19,22,.3) 40%, rgba(14,19,22,.45) 80%, var(--ref-dark) 100%);
}
.ref-hero-head { position: relative; z-index: 2; }

/* --------------------------------------------------------------------------
   2. Showcase grid (index)
   -------------------------------------------------------------------------- */
.ref-showcase {
  background: #fbfaf7;
  padding: clamp(56px, 8vw, 110px) clamp(20px, 4vw, 48px) clamp(64px, 9vw, 120px);
}
.ref-showcase-inner { max-width: 1320px; margin: 0 auto; }

.ref-showcase-head { max-width: 760px; margin: 0 0 clamp(36px, 5vw, 64px); }
.ref-showcase-head .eyebrow {
  font-family: "Schibsted KD", Arial, Helvetica, sans-serif;
  text-transform: uppercase; letter-spacing: .16em; font-size: .8rem;
  color: var(--accent); display: block; margin-bottom: 14px;
}
.ref-showcase-head h2 {
  font-family: "Schibsted KD", Arial, Helvetica, sans-serif;
  font-weight: 700; line-height: 1.1; letter-spacing: -.01em;
  font-size: clamp(1.9rem, 3.4vw, 2.9rem); margin: 0; color: var(--ink);
}
.ref-showcase-head p { margin: 16px 0 0; color: var(--muted); font-size: 1.05rem; }

.ref-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(28px, 4vw, 56px) clamp(24px, 3vw, 44px);
}

.ref-card {
  display: flex;
  flex-direction: column;
  /* reveal start state (referenzen.js adds .is-visible) */
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s ease, transform .7s cubic-bezier(.16,.84,.44,1);
}
.ref-card.is-visible { opacity: 1; transform: none; }

.ref-card-link { text-decoration: none; color: inherit; display: block; }

.ref-card-media {
  position: relative;
  aspect-ratio: 16 / 9;          /* 16:9 always — never crop the device mockup */
  border-radius: 16px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 18px 40px -28px rgba(16,22,25,.45);
  transition: transform .5s cubic-bezier(.16,.84,.44,1), box-shadow .5s ease;
}
.ref-card-media img {
  width: 100%; height: 100%;
  object-fit: cover;             /* mockup is 16:9 already → no distortion */
  display: block;
}
.ref-card-link:hover .ref-card-media,
.ref-card-link:focus-visible .ref-card-media {
  transform: translateY(-6px);
  box-shadow: 0 28px 60px -30px rgba(16,22,25,.5);
}

/* Index combo cards: live Mac+iPhone mockup (referenzen-cards.js) renders
   freely — no white box, border, or 16:9 clip. Scoped to [data-combo] so the
   case-study related cards keep their framed thumbnails. */
.ref-card-media[data-combo] {
  aspect-ratio: auto;
  background: none;
  border: 0;
  border-radius: 0;
  overflow: visible;
  box-shadow: none;
  padding: 6px 0 2px;
}
.ref-card-media[data-combo] .kd-combo { width: 100%; }
.ref-card-link:hover .ref-card-media[data-combo],
.ref-card-link:focus-visible .ref-card-media[data-combo] { box-shadow: none; }

.ref-card-kicker {
  margin: 22px 0 8px;
  font-family: "Schibsted KD", Arial, Helvetica, sans-serif;
  text-transform: uppercase; letter-spacing: .14em; font-size: .78rem;
  color: var(--muted);
}
.ref-card-title {
  font-family: "Schibsted KD", Arial, Helvetica, sans-serif;
  font-weight: 700; line-height: 1.18; letter-spacing: -.01em;
  font-size: clamp(1.3rem, 2vw, 1.7rem); color: var(--ink); margin: 0;
}

.ref-tags { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 0; padding: 0; }
.ref-tags li {
  font-size: .78rem; color: #4a4a4a;
  background: var(--soft); border-radius: 999px; padding: 6px 12px;
}

.ref-more {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 18px;
  font-family: "Schibsted KD", Arial, Helvetica, sans-serif;
  font-size: .92rem; color: var(--accent); font-weight: 700;
}
.ref-more svg { width: 16px; height: 16px; transition: transform .3s ease; }
.ref-card-link:hover .ref-more svg,
.ref-card-link:focus-visible .ref-more svg { transform: translateX(4px); }

/* --------------------------------------------------------------------------
   3. Case-study page
   -------------------------------------------------------------------------- */
.cs-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--ref-dark);
  color: #fff;
  padding: clamp(120px, 16vh, 200px) clamp(20px, 4vw, 48px) clamp(48px, 7vw, 88px);
}
/* dimmed screenshot of the actual client site, behind the dark overlay */
.cs-hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background-size: cover;
  background-position: center top;
  opacity: .22;
  transform: scale(1.05);
}
.cs-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(120% 90% at 50% 0%, rgba(20,27,31,.30) 0%, rgba(14,19,22,.82) 62%),
    linear-gradient(180deg, rgba(14,19,22,.5), rgba(14,19,22,.93));
}
.cs-hero-inner { position: relative; z-index: 1; max-width: 1240px; margin: 0 auto; }

.cs-breadcrumb { font-size: .82rem; color: #8b9296; margin: 0 0 28px; }
.cs-breadcrumb a { color: #c7ccce; text-decoration: none; }
.cs-breadcrumb a:hover { color: #fff; }

.cs-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(260px, .7fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: end;
}
.cs-kicker {
  font-family: "Schibsted KD", Arial, Helvetica, sans-serif;
  text-transform: uppercase; letter-spacing: .16em; font-size: .82rem;
  color: var(--accent); margin: 0 0 14px;
}
.cs-title {
  font-family: "Schibsted KD", Arial, Helvetica, sans-serif;
  font-weight: 700; line-height: 1.07; letter-spacing: -.01em;
  font-size: clamp(2rem, 4.4vw, 3.4rem); margin: 0; color: #fff;
}
.cs-meta { display: grid; gap: 16px; }
.cs-meta-item { border-top: 1px solid rgba(255,255,255,.14); padding-top: 12px; }
.cs-meta-label { display: block; font-size: .72rem; text-transform: uppercase; letter-spacing: .14em; color: #8b9296; margin-bottom: 4px; }
.cs-meta-value { font-size: .98rem; color: #eef1f2; }
.cs-meta-value a { color: var(--accent); text-decoration: none; }
.cs-meta-value a:hover { text-decoration: underline; }

.cs-media {
  max-width: 940px; margin: clamp(-56px, -5vw, -32px) auto 0;
  padding: 0 clamp(20px, 4vw, 48px);
  position: relative; z-index: 2;
}
.cs-media .mbp-mockup-wrapper { margin: 0 auto; filter: drop-shadow(0 40px 70px rgba(16,22,25,.45)); }
/* legacy flat-frame fallback (kept for any page still using it) */
.cs-media-frame {
  aspect-ratio: 16 / 9;
  border-radius: 18px; overflow: hidden; background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 40px 80px -48px rgba(16,22,25,.55);
}
.cs-media-frame img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* Device toggle (Mac <-> iPhone) — injected by referenzen-device.js.
   The desktop Mac ships static; the iPhone + Safari chrome + toggle are added
   on load. `data-device` on .cs-media controls which device is visible. */
.cs-media .kd-iphone-mount.cs-device-phone {
  width: clamp(220px, 30vw, 288px);
  margin: 0 auto;
  filter: drop-shadow(0 34px 56px rgba(16,22,25,.42));
}
.cs-media[data-device="desktop"] .cs-device-phone { display: none; }
.cs-media[data-device="mobile"] .mbp-mockup-wrapper { display: none; }
.cs-media .mbp-mockup-wrapper,
.cs-media .cs-device-phone { animation: cs-device-in .22s ease both; }
@keyframes cs-device-in {
  from { opacity: 0; transform: translateY(8px) scale(.985); }
  to   { opacity: 1; transform: none; }
}

.cs-device-toggle {
  display: flex; gap: 4px; width: fit-content; margin: 26px auto 0;
  padding: 4px; border-radius: 999px;
  background: rgba(16,22,25,.06);
  border: 1px solid var(--line);
}
.cs-device-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 18px; border: 0; border-radius: 999px;
  background: transparent; color: #5a6469;
  font: 600 .9rem/1 inherit; letter-spacing: .01em; cursor: pointer;
  transition: background .18s ease, color .18s ease;
}
.cs-device-btn svg { width: 16px; height: 16px; flex: none; }
.cs-device-btn.is-active {
  background: #fff; color: #16191b;
  box-shadow: 0 1px 3px rgba(16,22,25,.16);
}
.cs-device-btn:hover:not(.is-active) { color: #16191b; }
.cs-device-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

@media (prefers-reduced-motion: reduce) {
  .cs-media .mbp-mockup-wrapper,
  .cs-media .cs-device-phone { animation: none; }
}

/* Editorial body system — 2x2 act grid. See docs/plans/2026-06-23-001-feat-case-study-editorial-system-plan.md
   The four acts (Kunde/Aufgabe/Lösung/Ergebnis) compose a 2-D grid on desktop +
   tablet and collapse to a single column on phones. No ordinals (the index already
   numbers projects). Copy is never touched — structure is markup wrappers + CSS only.
   Schibsted KD is weight-700 only → hierarchy from size + colour + space. */
.cs-body {
  --cs-text: #1d2123;          /* body ink, a touch darker than the old #2b2f31 */
  --cs-paper: #fbfaf7;         /* page bg, painted into cells so the 1px gaps read as hairlines */
  max-width: 1080px;
  margin: clamp(52px, 8vw, 96px) auto 0;
  padding: 0 clamp(20px, 4vw, 48px);
}
.cs-body h2 {
  font-family: "Schibsted KD", Arial, Helvetica, sans-serif;
  font-weight: 700; line-height: 1.15; font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  color: var(--ink); margin: clamp(36px, 5vw, 52px) 0 14px;
}
.cs-body > :first-child { margin-top: 0; }

/* Standfirst lede — centered under the (centered) laptop mockup, above the grid */
.cs-body .cs-lead {
  max-width: 760px;
  margin: 0 auto clamp(34px, 4.5vw, 52px);
  text-align: center;
  font-size: clamp(1.3rem, 2.1vw, 1.55rem);
  line-height: 1.46;
  color: var(--ink);
}

/* The four acts as a 2x2 grid. Hairline cross-dividers come from a 1px gap over a
   --line background; cells paint --cs-paper so only the gaps show through. */
.cs-acts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
}
.cs-act {
  background: var(--cs-paper);
  padding: clamp(26px, 3vw, 42px);
}
.cs-act h2 {
  font-family: "Schibsted KD", Arial, Helvetica, sans-serif;
  font-weight: 700; line-height: 1.14; letter-spacing: -.01em;
  font-size: clamp(1.35rem, 2.1vw, 1.8rem);
  color: var(--ink);
  margin: 0 0 14px;
}
.cs-act p {
  color: var(--cs-text);
  font-size: 1.02rem; line-height: 1.62;
  margin: 0 0 .85em;
}
.cs-act p:last-child { margin-bottom: 0; }
.cs-act p strong { color: var(--ink); font-weight: 700; }

/* Das Ergebnis — the payoff cell, set apart by a subtle warm tint */
.cs-act-result {
  background: var(--soft);
}

/* Phone — collapse the grid to a single column */
@media (max-width: 700px) {
  .cs-acts { grid-template-columns: 1fr; }
  .cs-body .cs-lead { font-size: clamp(1.22rem, 5.2vw, 1.45rem); }
}

.cs-tags { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 0; padding: 0; }
.cs-tags li { font-size: .8rem; color: #eef1f2; background: rgba(255,255,255,.1); border-radius: 999px; padding: 6px 13px; }

/* CTA panel */
.cs-cta {
  max-width: 1080px; margin: clamp(56px, 8vw, 96px) auto 0;
  padding: 0 clamp(20px, 4vw, 48px);
}
.cs-cta-inner {
  background: linear-gradient(135deg, var(--cta-from), var(--cta-to));
  border-radius: 22px; padding: clamp(32px, 5vw, 56px);
  color: #fff; text-align: center;
}
.cs-cta-inner h2 {
  font-family: "Schibsted KD", Arial, Helvetica, sans-serif;
  font-weight: 700; font-size: clamp(1.5rem, 3vw, 2.2rem); margin: 0 0 10px;
}
.cs-cta-inner p { margin: 0 0 22px; color: rgba(255,255,255,.9); }
.cs-cta .button-row { justify-content: center; }
.cs-cta .button {
  background: #fff; color: var(--accent-deep); border: 0;
}
.cs-cta .button.secondary { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,.7); }

/* related */
.cs-related {
  max-width: 1320px; margin: clamp(64px, 9vw, 110px) auto 0;
  padding: 0 clamp(20px, 4vw, 48px) clamp(64px, 9vw, 110px);
}
.cs-related h2 {
  font-family: "Schibsted KD", Arial, Helvetica, sans-serif;
  font-weight: 700; font-size: clamp(1.4rem, 2.4vw, 1.9rem); color: var(--ink);
  margin: 0 0 clamp(24px, 4vw, 40px);
}
.cs-related-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 36px);
}
/* related cards reuse .ref-card visuals but render visible (no scroll reveal) */
.cs-related .ref-card { opacity: 1; transform: none; }

/* --------------------------------------------------------------------------
   4. Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
  .ref-grid { grid-template-columns: 1fr; gap: 40px; }
  .cs-hero-grid { grid-template-columns: 1fr; gap: 28px; align-items: start; }
  .cs-related-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .ref-hero { min-height: calc(100vh + 40vh); }
  .ref-hero-title { font-size: clamp(2.2rem, 11vw, 3.2rem); }
}

/* --------------------------------------------------------------------------
   5. Reduced motion — render everything static, no shrink, no reveal
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .ref-hero { min-height: 100vh; }
  .ref-hero-head { transform: none !important; opacity: 1 !important; }
  .ref-card { opacity: 1; transform: none; transition: none; }
  .ref-hero-collage .ctile { transform: none !important; }
}