/* Work · Birkholz — Case Study
   Hero mit Sucher, Editorial-Kontext, Prozess, vier Duft-Kapitel (Quellbild + Welten), Serien & Kollektionen, Motion. */

.bk-hero, .bk-intro, .bk-process, .bk-scent, .bk-sets, .bk-motion { padding-inline: var(--gutter); }
.bk-hero .display em, .bk-intro .display em, .bk-process .display em, .bk-scent .display em, .bk-sets .display em, .bk-motion .display em { font-size: 0.8333em; }

/* ---------- 1 · Hero ---------- */
.bk-hero { min-height: calc(100svh - var(--nav-h)); display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr); gap: clamp(32px, 5vw, 96px); align-items: center; padding-block: clamp(32px, 6vh, 72px); }
.bk-hero .display { margin: 20px 0 28px; font-size: clamp(48px, 6vw, 96px); }
.bk-hero__sub { margin: 0; max-width: 460px; font-size: 17px; line-height: 1.55; color: #a39f98; }
.bk-meta { margin: clamp(32px, 6vh, 64px) 0 0; display: grid; gap: 0; max-width: 520px; border-top: 1px solid var(--line); }
.bk-meta div { display: grid; grid-template-columns: 96px 1fr; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.bk-meta dt { font-size: 10px; color: var(--mute); padding-top: 3px; }
.bk-meta dd { margin: 0; font-size: 14px; }
.bk-hero__stage { position: relative; margin: 0; justify-self: center; width: min(100%, calc((100svh - var(--nav-h) - 96px) * 2 / 3)); aspect-ratio: 2 / 3; overflow: hidden; background: var(--ink-3); }
.bk-hero__stage img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; filter: blur(10px); transform: scale(1.04); transition: opacity 1s var(--ease), filter 1.2s var(--ease), transform 4s var(--ease); }
.bk-hero__stage img.is-on { opacity: 1; filter: none; transform: none; }
.bk-corner { position: absolute; z-index: 2; width: 22px; height: 22px; border: 0 solid var(--lumen); }
.bk-corner--tl { top: 14px; left: 14px; border-width: 2px 0 0 2px; } .bk-corner--tr { top: 14px; right: 14px; border-width: 2px 2px 0 0; }
.bk-corner--bl { bottom: 14px; left: 14px; border-width: 0 0 2px 2px; } .bk-corner--br { bottom: 14px; right: 14px; border-width: 0 2px 2px 0; }
.bk-hero__cap { position: absolute; z-index: 2; left: 46px; bottom: 22px; display: flex; gap: 10px; font-size: 10px; color: #fff; text-shadow: 0 1px 10px rgb(0 0 0 / 0.5); }
.bk-hero__cap [data-hero-step] { color: var(--lumen); }

/* ---------- 2 · Kontext (Editorial) ---------- */
.bk-intro { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: clamp(12px, 1.6vw, 24px); align-items: end; padding-block: clamp(110px, 18vh, 200px); border-top: 1px solid var(--line); }
.bk-intro__head { grid-column: 1 / span 9; font-size: clamp(48px, 6.4vw, 108px); line-height: 0.95; }
.bk-intro__head > * { display: block; }
.bk-intro__copy { grid-column: 9 / span 4; margin: clamp(32px, 6vh, 64px) 0 0; max-width: 360px; padding-top: 18px; position: relative; font-size: 15px; line-height: 1.6; color: #a39f98; }
.bk-intro__copy::before { content: ""; position: absolute; left: 0; top: 0; width: 28px; height: 1px; background: var(--lumen); }

/* ---------- 3 · Prozess ---------- */
.bk-process { padding-block: clamp(48px, 8vh, 96px); border-top: 1px solid var(--line); }
.bk-process .display, .bk-sets .display, .bk-motion .display { margin: 16px 0 0; font-size: clamp(40px, 4.4vw, 72px); line-height: 0.95; }
.bk-steps { list-style: none; margin: clamp(36px, 6vh, 64px) 0 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(14px, 1.6vw, 24px); }
.bk-steps li { border-top: 1px solid var(--line); padding-top: 18px; }
.bk-steps li:last-child { border-top-color: var(--lumen); }
.bk-steps figure { margin: 0 0 16px; height: clamp(180px, 30svh, 320px); overflow: hidden; background: var(--ink-3); }
.bk-steps figure img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s var(--ease); }
.bk-steps li:hover figure img { transform: scale(1.04); }
.bk-steps__cut { outline: 1px dashed rgb(226 255 79 / 0.6); outline-offset: -1px; } /* freigestellt: das Bild zeigt bereits das Transparenz-Raster */
.bk-steps .label { font-size: 10px; color: var(--lumen); }
.bk-steps strong { display: block; margin: 6px 0 8px; font-family: var(--serif); font-weight: 400; font-size: 34px; }
.bk-steps p { margin: 0; max-width: 260px; font-size: 14px; line-height: 1.5; color: var(--mute); }

/* ---------- 4 · Duft-Kapitel: jedes Kapitel passt auf einen Bildschirm ----------
   Links Titel oben, Quelle + Welten unten; rechts das große Bild in Fensterhöhe. Abwechselnd gespiegelt. */
.bk-scent { --h: calc(100svh - var(--nav-h) - 2 * clamp(28px, 5vh, 56px)); position: relative; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: clamp(28px, 4vw, 72px);
  min-height: calc(100svh - var(--nav-h)); padding-block: clamp(28px, 5vh, 56px); border-top: 1px solid var(--line); isolation: isolate; align-items: stretch; }
.bk-scent::before { content: ""; position: absolute; z-index: -1; right: 8%; top: 50%; width: 52vw; aspect-ratio: 1; translate: 0 -50%; border-radius: 50%; pointer-events: none;
  background: radial-gradient(circle, rgb(var(--tint) / 0.2), transparent 62%); }
.bk-scent--flip { grid-template-columns: auto minmax(0, 1fr); }
.bk-scent--flip::before { right: auto; left: 8%; }
.bk-scent--flip .bk-scent__stage { order: -1; }
.bk-scent__info { display: flex; flex-direction: column; justify-content: space-between; min-height: 0; }
.bk-scent__head .display { margin: 16px 0 0; font-size: clamp(40px, 4.4vw, 72px); line-height: 0.95; }
.bk-scent__stage { position: relative; margin: 0; height: var(--h); aspect-ratio: 2 / 3; overflow: hidden; background: var(--ink-3); }
.bk-scent__stage img, .bk-scent__stage video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: opacity 0.6s var(--ease); }
.bk-scent__stage .is-out { opacity: 0; }
.bk-scent__side { display: flex; align-items: flex-end; gap: clamp(16px, 2vw, 32px); }
.bk-scent__src { flex: none; margin: 0; width: clamp(88px, 8vw, 128px); }
.bk-scent__src img { width: 100%; aspect-ratio: 2 / 3; object-fit: cover; outline: 1px dashed rgb(242 239 233 / 0.4); outline-offset: 4px; }
.bk-scent__src figcaption { margin-top: 10px; font-size: 9px; line-height: 1.5; color: var(--mute); }
.bk-thumbs { list-style: none; margin: 0 0 22px; padding: 0 0 0 clamp(16px, 2vw, 32px); display: flex; flex-wrap: wrap; gap: 6px; border-left: 1px solid var(--line); }
.bk-thumbs li { width: clamp(44px, 4vw, 62px); }
.bk-thumbs button { position: relative; display: block; width: 100%; aspect-ratio: 2 / 3; overflow: hidden; background: var(--ink-3); outline: 1px solid transparent; outline-offset: 2px; transition: outline-color 0.25s var(--ease); }
.bk-thumbs img { width: 100%; height: 100%; object-fit: cover; opacity: 0.55; transition: opacity 0.3s var(--ease); }
.bk-thumbs button:hover img { opacity: 1; }
.bk-thumbs button[aria-pressed="true"] { outline: 1.5px solid var(--lumen); }
.bk-thumbs button[aria-pressed="true"] img { opacity: 1; }
.bk-play { position: absolute; left: 50%; top: 50%; width: 20px; height: 20px; margin: -10px; border-radius: 50%; background: var(--lumen); }
.bk-play::after { content: ""; position: absolute; left: 8px; top: 6px; border-left: 6px solid var(--ink); border-top: 4px solid transparent; border-bottom: 4px solid transparent; }

/* Zwischenbild */
.bk-break { position: relative; margin: 0; height: min(78svh, 56vw); overflow: hidden; }
.bk-break img { width: 100%; height: 100%; object-fit: cover; }
.bk-break figcaption { position: absolute; left: var(--gutter); bottom: 22px; font-size: 10px; color: #fff; text-shadow: 0 1px 10px rgb(0 0 0 / 0.5); }

/* ---------- 5 · Serien & Kollektionen ---------- */
.bk-sets, .bk-motion { padding-block: clamp(48px, 8vh, 96px); }
.bk-sets__head, .bk-motion__head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 360px); grid-template-rows: auto auto; column-gap: 48px; align-items: end; margin-bottom: clamp(32px, 5vh, 56px); }
.bk-sets__head .label, .bk-motion__head .label { grid-column: 1 / -1; }
.bk-sets__lead { margin: 0; font-size: 15px; line-height: 1.6; color: #a39f98; }
.bk-set { padding: 26px 0 30px; border-top: 1px solid var(--line); }
.bk-set__name { margin: 0 0 18px; display: flex; gap: 14px; align-items: baseline; font-family: var(--serif); font-size: 28px; }
.bk-set__name .label { font-size: 10px; color: var(--lumen); }
.bk-set__row { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: clamp(8px, 1vw, 14px); }
.bk-set__row--src { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.bk-set__row figure { position: relative; margin: 0; overflow: hidden; background: var(--ink-3); }
.bk-set__row img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; transition: transform 1s var(--ease); }
.bk-set__row--sq img { aspect-ratio: 1; }
.bk-set__row figure:hover img { transform: scale(1.04); }
.bk-set__row figcaption { position: absolute; left: 10px; bottom: 10px; font-size: 9.5px; color: #fff; text-shadow: 0 1px 8px rgb(0 0 0 / 0.5); }
.bk-set__src img { outline: 1px dashed rgb(242 239 233 / 0.35); outline-offset: -6px; filter: saturate(0.85); }

/* ---------- 6 · Motion ---------- */
.bk-motion { border-top: 1px solid var(--line); }
.bk-films { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: clamp(8px, 1vw, 14px); }
.bk-films figure { position: relative; margin: 0; overflow: hidden; background: var(--ink-3); }
.bk-films video { display: block; width: 100%; aspect-ratio: 3 / 4; object-fit: cover; }
.bk-films figcaption { position: absolute; left: 12px; bottom: 12px; font-size: 9.5px; color: #fff; text-shadow: 0 1px 8px rgb(0 0 0 / 0.5); }

/* sanftes Erscheinen */
:root.has-reveal .bk-reveal { opacity: 0; translate: 0 24px; transition: opacity 1s var(--ease), translate 1s var(--ease); }
:root.has-reveal .bk-reveal.is-in { opacity: 1; translate: 0 0; }

/* ---------- Tablet / Handy ---------- */
@media (max-width: 1100px) {
  .bk-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 40px; }
  .bk-steps figure { height: auto; aspect-ratio: 1; }
  .bk-films { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
  .bk-hero { grid-template-columns: 1fr; min-height: 0; }
  .bk-hero__stage { order: -1; width: 100%; max-height: 72svh; aspect-ratio: 4 / 5; }
  .bk-hero .display { font-size: 48px; margin: 16px 0 18px; }
  .bk-intro { display: block; padding-block: 88px; }
  .bk-intro__head { font-size: 44px; }
  .bk-intro__copy { margin-top: 36px; }
  .bk-scent, .bk-scent--flip { grid-template-columns: 1fr; min-height: 0; padding-block: 56px; gap: 22px; }
  .bk-scent--flip .bk-scent__stage { order: 0; }
  .bk-scent__stage { height: auto; width: 100%; }
  .bk-scent__info { display: contents; }
  .bk-scent__head { order: -1; }
  .bk-scent__side { order: 1; }
  .bk-thumbs li { width: 52px; }
  .bk-sets__head, .bk-motion__head { display: block; }
  .bk-sets__lead { margin-top: 20px; }
  .bk-set__row, .bk-set__row--src { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bk-set__src { grid-column: 1 / -1; width: 50%; }
  .bk-films { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bk-break { height: 60svh; }
}
@media (prefers-reduced-motion: reduce) {
  .bk-hero__stage img { transition: none; filter: none; transform: none; }
  :root.has-reveal .bk-reveal { opacity: 1; translate: none; }
}