/* Atelier Voss Architektur — Konzeptprojekt (Phase R4)
   Eigenes Design-System, bewusst nicht die Tokens der Hauptseite.
   Radius 0, keine Schatten, keine Karten, keine Symbole. */

@font-face {
  font-family: 'Fraunces';
  src: url('assets/fonts/Fraunces-latin.woff2') format('woff2');
  font-weight: 300 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Fraunces';
  src: url('assets/fonts/Fraunces-italic-latin.woff2') format('woff2');
  font-weight: 300 600;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: 'Manrope';
  src: url('assets/fonts/Manrope-latin.woff2') format('woff2');
  font-weight: 400 500;
  font-style: normal;
  font-display: swap;
}

:root {
  /* Fläche — drei klare Tonwerte, keine aufgehellten Akzentfarben */
  --bg:      #f5f3ee;
  --paper:   #fbfaf7;
  --shell:   #e7e3da;
  --block:   #ded9cf;   /* Baukörper im Lageplan */
  --park:    #e2e0d3;   /* Grünfläche im Lageplan */

  /* Schrift und Linie */
  --ink:     #111111;
  --muted:   #5f5a51;   /* Fließtext sekundär — 6,1:1 auf --bg */
  --stone:   #8a8478;   /* NUR Linien und Flächen, nie Text (3,3:1 auf --bg) */
  --line:    #d8d4cb;
  --line-2:  #c6c1b5;

  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-text: 'Manrope', system-ui, -apple-system, 'Segoe UI', sans-serif;

  /* Typo-Skala */
  --t-mega:  clamp(3.5rem, 13vw, 9.5rem);
  --t-xl:    clamp(2.125rem, 5.6vw, 4rem);
  --t-l:     clamp(1.75rem, 3.4vw, 2.5rem);
  --t-m:     clamp(1.3125rem, 2.1vw, 1.625rem);
  --t-s:     1.0625rem;
  --t-body:  1.0625rem;
  --t-small: 0.9375rem;
  --t-micro: 0.75rem;

  --gutter: clamp(1.25rem, 5vw, 5rem);
  --gap: clamp(2rem, 4vw, 3.5rem);
  --sec: clamp(5rem, 11vw, 10.5rem);
  --measure: 62ch;

  --ease: cubic-bezier(.2, .7, .2, 1);
  --dur: 700ms;
  --dur-fast: 320ms;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 5.5rem; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: var(--t-body);
  font-weight: 400;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
h1, h2, h3 { margin: 0; font-weight: 400; line-height: 1.02; letter-spacing: -0.015em; }
p { margin: 0; }
ul, ol, dl, dd { margin: 0; padding: 0; }
li { list-style: none; }

a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 50;
  background: var(--ink); color: var(--bg); padding: .875rem 1.25rem;
  font-size: var(--t-small);
}
.skip:focus { left: 0; }

/* ---------------------------------------------------------------- Header */

.head {
  position: sticky; top: 0; z-index: 20;
  display: flex; flex-wrap: wrap; align-items: baseline;
  gap: .25rem var(--gap);
  padding: .875rem var(--gutter);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-fast) var(--ease);
}
.head.is-stuck { border-bottom-color: var(--line); }

.head__mark {
  display: inline-flex; align-items: center; min-height: 44px;
  font-family: var(--font-display);
  font-variation-settings: 'opsz' 120, 'wght' 500;
  font-size: 1.5rem; letter-spacing: .1em; line-height: 1;
}

.head__index { margin-left: auto; display: flex; gap: clamp(1rem, 2.6vw, 2.25rem); }
.head__index a {
  display: inline-flex; align-items: center; min-height: 44px;
  font-size: var(--t-small); color: var(--muted);
  transition: color var(--dur-fast) var(--ease);
}
.head__index a:hover, .head__index a:focus-visible { color: var(--ink); }

@media (max-width: 560px) {
  .head { padding-top: .625rem; padding-bottom: 0; }
  .head__mark { font-size: 1.25rem; }
  .head__index {
    margin-left: 0; width: 100%;
    justify-content: space-between; gap: .5rem;
    border-top: 1px solid var(--line); margin-top: .375rem;
  }
  .head__index a { font-size: var(--t-micro); letter-spacing: .04em; }
}

/* ------------------------------------------------------------------ Hero */

.hero { position: relative; }
.hero__frame { overflow: hidden; height: min(84svh, 760px); min-height: 380px; }
.hero__img { width: 100%; height: 100%; object-fit: cover; }

.html-anim .hero__img,
.js .hero__img { animation: kenburns 42s var(--ease) infinite alternate; }
@keyframes kenburns {
  from { transform: scale(1.045) translate3d(0.8%, 0.6%, 0); }
  to   { transform: scale(1) translate3d(0, 0, 0); }
}

.hero__foot {
  position: absolute; inset: auto 0 0 0;
  display: flex; flex-wrap: wrap; align-items: flex-end;
  justify-content: space-between; gap: 1.5rem var(--gap);
  padding: clamp(3rem, 12vw, 7rem) var(--gutter) clamp(1.5rem, 3vw, 2.75rem);
  /* Der Verlauf traegt die Lesbarkeit ueber dem Foto. In R14 pixelgenau nachgemessen
     (Ausschnitt in Dokument-Koordinaten): Adresszeile 13,7:1, H1 14,0:1 - beide klar
     ueber AA, der Verlauf bleibt daher unveraendert. */
  background: linear-gradient(to top, rgb(17 17 17 / .62) 0%, rgb(17 17 17 / .34) 46%, rgb(17 17 17 / 0) 100%);
  color: var(--paper);
}
.hero__title {
  font-family: var(--font-display);
  font-variation-settings: 'opsz' 144, 'wght' 400;
  font-size: var(--t-xl);
  max-width: 12ch;
}
.hero__addr {
  font-size: var(--t-micro); letter-spacing: .1em; text-transform: uppercase;
  font-weight: 500; line-height: 1.5;
}

/* ----------------------------------------------------------- Projektindex */

.idx { padding: var(--sec) 0 clamp(3rem, 6vw, 5rem); }

.idx__head {
  display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between;
  gap: 1rem var(--gap);
  padding: 0 var(--gutter) clamp(2rem, 4vw, 3rem);
}
.idx__title {
  font-family: var(--font-display);
  font-variation-settings: 'opsz' 144, 'wght' 300;
  font-size: var(--t-mega);
  letter-spacing: -0.03em;
}
.idx__note { font-size: var(--t-small); color: var(--muted); max-width: 34ch; padding-bottom: .6rem; }

.idx__list { border-top: 1px solid var(--line-2); }

.idx__row {
  position: relative;
  display: grid;
  grid-template-columns: 3.5rem minmax(0, 1fr) 11rem 4.5rem 12rem;
  align-items: baseline;
  gap: 0 1.5rem;
  padding: clamp(1rem, 1.9vw, 1.5rem) var(--gutter);
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  transition: background-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.idx__nr { font-size: var(--t-micro); letter-spacing: .08em; color: var(--muted); }
.idx__name {
  font-family: var(--font-display);
  font-variation-settings: 'opsz' 60, 'wght' 400;
  font-size: var(--t-m); color: var(--ink); line-height: 1.15;
}
.idx__name i { font-style: italic; }
.idx__place, .idx__year, .idx__type { font-size: var(--t-small); }
.idx__type { text-align: right; }

@media (hover: hover) and (min-width: 1024px) {
  .idx__row:hover { background: var(--paper); color: var(--ink); }
}

.idx__fig { margin: 1.25rem 0 .25rem; grid-column: 2 / -1; }
.idx__fig img { width: 100%; max-width: 26rem; aspect-ratio: 3 / 4; object-fit: cover; }

/* Fallback ab 901 px (kein Zeigegerät, Reduced Motion, kein JS): das Bild steht
   rechts in der Zeile — der Index bleibt lesbar, es geht nichts verloren. */
@media (min-width: 901px) {
  .idx__row {
    grid-template-columns: 3.5rem minmax(0, 1fr) 11rem 4.5rem 18rem;
    grid-template-rows: auto auto 1fr;
    align-items: baseline;
    row-gap: .35rem;
  }
  .idx__nr    { grid-column: 1; grid-row: 1; }
  .idx__name  { grid-column: 2; grid-row: 1; }
  .idx__place { grid-column: 3; grid-row: 1; }
  .idx__year  { grid-column: 4; grid-row: 1; }
  .idx__type  { grid-column: 2 / 5; grid-row: 2; text-align: left; }
  .idx__fig   { grid-column: 5; grid-row: 1 / -1; margin: 0; align-self: start; }
  .idx__fig img { max-width: none; aspect-ratio: 4 / 5; }
}

/* Signature: Bild folgt dem Zeiger — nur Desktop mit Zeigegerät und ohne Reduced Motion */
@media (hover: hover) and (min-width: 1024px) and (prefers-reduced-motion: no-preference) {
  .js .idx__row {
    grid-template-columns: 3.5rem minmax(0, 1fr) 11rem 4.5rem 12rem;
    grid-template-rows: auto;
    row-gap: 0;
  }
  .js .idx__type { grid-column: 5; grid-row: 1; text-align: right; }
  .js .idx__fig {
    position: fixed; left: 0; top: 0; z-index: 10;
    margin: 0; width: min(24vw, 22rem);
    opacity: 0; pointer-events: none;
    transition: opacity var(--dur-fast) var(--ease);
    will-change: transform;
  }
  .js .idx__fig img { max-width: none; }
  .js .idx__fig.is-on { opacity: 1; }
}

@media (max-width: 900px) {
  .idx__row {
    grid-template-columns: 3rem minmax(0, 1fr);
    row-gap: .35rem;
    padding-block: 1.25rem;
  }
  .idx__name { grid-column: 2; }
  .idx__place { grid-column: 2; }
  .idx__year { grid-column: 1; grid-row: 3; font-size: var(--t-micro); }
  .idx__type { grid-column: 2; grid-row: 3; text-align: left; }
  .idx__place { font-size: var(--t-small); }
  .idx__fig { grid-column: 2; margin-top: .875rem; }
  .idx__fig img { aspect-ratio: 4 / 3; max-width: none; }
}

/* ------------------------------------------------------------ Case-Blöcke */

.cases { padding-bottom: var(--sec); }
.case + .case { margin-top: clamp(4rem, 9vw, 8rem); }

.case__fig { margin: 0; }
.case__fig img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }

.case__body {
  display: grid; gap: clamp(1.25rem, 3vw, 2.5rem);
  grid-template-columns: repeat(12, 1fr);
  padding: clamp(1.5rem, 3vw, 2.5rem) var(--gutter) 0;
}
.case__title {
  grid-column: 1 / -1;
  font-family: var(--font-display);
  font-variation-settings: 'opsz' 90, 'wght' 400;
  font-size: var(--t-l);
}
.case__title i { font-style: italic; }
.case__facts { grid-column: 1 / 5; align-self: start; }
.case__facts > div {
  display: flex; justify-content: space-between; gap: 1rem;
  padding: .5rem 0; border-top: 1px solid var(--line);
  font-size: var(--t-small);
}
.case__facts dt { color: var(--muted); }
.case__facts dd { text-align: right; }
.case__text { grid-column: 6 / 12; max-width: var(--measure); color: var(--muted); }

@media (max-width: 860px) {
  .case__facts { grid-column: 1 / -1; }
  .case__text { grid-column: 1 / -1; }
}

/* -------------------------------------------------------------- Material */

.mat { background: var(--shell); padding: var(--sec) 0; }
.mat__intro {
  padding: 0 var(--gutter) clamp(2rem, 4vw, 3rem);
  display: grid; gap: .875rem;
  grid-template-columns: minmax(0, 22rem) minmax(0, 34ch);
  align-items: end;
}
.mat__title {
  font-family: var(--font-display);
  font-variation-settings: 'opsz' 144, 'wght' 300;
  font-size: var(--t-xl);
}
.mat__intro p { font-size: var(--t-small); color: var(--muted); max-width: var(--measure); }
.mat__hint {
  grid-column: 1; font-size: var(--t-small); color: var(--muted) !important;
  font-family: var(--font-display); font-style: italic;
  font-variation-settings: 'opsz' 40, 'wght' 400;
}
@media (max-width: 760px) {
  .mat__intro { grid-template-columns: 1fr; }
  .mat__hint { grid-column: auto; }
}

.mat__band {
  display: flex; gap: clamp(.75rem, 1.6vw, 1.25rem);
  overflow-x: auto; overscroll-behavior-x: contain;
  padding: 0 var(--gutter) 1.25rem;
  scrollbar-width: thin;
  cursor: grab;
}
.mat__band.is-dragging { cursor: grabbing; scroll-behavior: auto; }
.mat__band.is-dragging * { pointer-events: none; }
.mat__band > li { flex: 0 0 clamp(11rem, 24vw, 17rem); }
.mat__band img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; }
.mat__band p {
  margin-top: .625rem; font-size: var(--t-small); color: var(--muted);
  border-top: 1px solid var(--line-2); padding-top: .5rem;
}

/* ------------------------------------------------------------- Leistungen */

.serv { padding: var(--sec) var(--gutter); }
.serv__title {
  font-family: var(--font-display);
  font-variation-settings: 'opsz' 90, 'wght' 400;
  font-size: var(--t-l);
  margin-bottom: clamp(2rem, 4vw, 3rem);
}
.serv__cols { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); }
.serv__col { border-top: 1px solid var(--ink); padding-top: .875rem; }
.serv__col h3 {
  font-family: var(--font-display);
  font-variation-settings: 'opsz' 40, 'wght' 500;
  font-size: 1.125rem; margin-bottom: .5rem;
}
.serv__col p { font-size: var(--t-small); color: var(--muted); }
@media (max-width: 980px) { .serv__cols { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .serv__cols { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------- Atelier */

.office { background: var(--paper); padding: var(--sec) var(--gutter); }
.office__lead { margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.office__title {
  font-family: var(--font-display);
  font-variation-settings: 'opsz' 144, 'wght' 300;
  font-size: var(--t-xl);
  max-width: 16ch;
}
.office__grid {
  display: grid; gap: var(--gap);
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  align-items: start;
}
.office__text { display: grid; gap: 1.125rem; max-width: var(--measure); color: var(--muted); }
.office__awards { margin-top: .75rem; border-top: 1px solid var(--line); }
.office__awards li {
  display: flex; flex-wrap: wrap; gap: .5rem;
  padding: .625rem 0; border-bottom: 1px solid var(--line);
  font-size: var(--t-small);
}
.office__awards span { color: var(--muted); min-width: 3rem; }
.office__awards i { font-family: var(--font-display); font-style: italic; color: var(--ink); }

.office__fig { margin: 0; }
.office__fig img { width: 100%; aspect-ratio: 8 / 5; object-fit: cover; }
.office__fig figcaption {
  margin-top: .75rem; padding-top: .5rem; border-top: 1px solid var(--line);
  font-size: var(--t-small); color: var(--muted);
}
@media (max-width: 860px) { .office__grid { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------- Kontakt */

.contact { padding: var(--sec) var(--gutter); }
.contact__grid {
  display: grid; gap: var(--gap) clamp(2rem, 6vw, 6rem);
  grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  align-items: start;
}
.contact__title {
  font-family: var(--font-display);
  font-variation-settings: 'opsz' 90, 'wght' 400;
  font-size: var(--t-l);
  margin-bottom: 1.5rem;
}
.contact__addr { font-style: normal; font-size: var(--t-m); line-height: 1.4; }
.contact__meta { margin-top: 1.75rem; border-top: 1px solid var(--line); }
.contact__meta > div {
  display: flex; flex-wrap: wrap; gap: .5rem 1.5rem;
  padding: .625rem 0; border-bottom: 1px solid var(--line);
  font-size: var(--t-small);
}
.contact__meta dt { color: var(--muted); min-width: 7rem; }
.contact__meta a {
  display: inline-flex; align-items: center; min-height: 44px;
  text-decoration: underline; text-decoration-color: var(--line-2);
  text-underline-offset: .22em; text-decoration-thickness: 1px;
}
.contact__meta a:hover { text-decoration-color: var(--ink); }

.map { margin-top: 2.25rem; border: 1px solid var(--line-2); }
.map svg { display: block; width: 100%; height: auto; }
.map text { font-family: var(--font-text); }
.map__note { margin-top: .5rem; font-size: var(--t-micro); color: var(--muted); }

@media (max-width: 860px) { .contact__grid { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------- Formular */

.form { display: grid; gap: 1.25rem; }
.form__lead { font-size: var(--t-small); color: var(--muted); max-width: var(--measure); }
.field { display: grid; gap: .375rem; }
.field label { font-size: var(--t-micro); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.field input, .field select, .field textarea {
  font: inherit; font-size: 1rem; color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line-2); border-radius: 0;
  padding: .75rem .875rem; min-height: 48px; width: 100%;
  transition: border-color var(--dur-fast) var(--ease);
}
.field textarea { min-height: 8rem; resize: vertical; line-height: 1.55; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--ink); }
.field.is-bad input, .field.is-bad textarea { border-color: #8c2f1d; }
.field__err { font-size: var(--t-small); color: #8c2f1d; }

.form__send {
  justify-self: start;
  font: inherit; font-size: var(--t-small); font-weight: 500;
  color: var(--paper); background: var(--ink);
  border: 1px solid var(--ink); border-radius: 0;
  padding: .875rem 1.75rem; min-height: 48px; cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.form__send:hover { background: var(--bg); color: var(--ink); }
.form__done {
  border-top: 1px solid var(--ink); padding-top: .75rem;
  font-size: var(--t-small);
}

/* ----------------------------------------------------------------- Footer */

.foot { background: var(--shell); padding: clamp(3rem, 6vw, 5rem) var(--gutter) 2rem; }
.foot__grid {
  display: grid; gap: var(--gap);
  grid-template-columns: repeat(4, 1fr);
  font-size: var(--t-small); color: var(--muted);
}
.foot__mark {
  font-family: var(--font-display);
  font-variation-settings: 'opsz' 120, 'wght' 500;
  font-size: 1.5rem; letter-spacing: .1em; color: var(--ink); margin-bottom: .75rem;
}
.foot address { font-style: normal; }
.foot address a { display: inline-flex; align-items: center; min-height: 44px; }
.foot__h { color: var(--ink); margin-bottom: .5rem; }
.foot__nav a { display: inline-flex; align-items: center; min-height: 44px; }
.foot a {
  text-decoration: underline; text-decoration-color: var(--line-2);
  text-underline-offset: .22em; text-decoration-thickness: 1px;
}
.foot a:hover { text-decoration-color: var(--ink); }
.foot__nav a { text-decoration: none; }
.foot__nav a:hover { text-decoration: underline; text-decoration-color: var(--ink); }
/* „Über dieses Konzeptprojekt" — natives <details>, damit es ohne JavaScript
   funktioniert. Der Marker ist entfernt: die Seite bleibt symbolfrei. */
.note {
  margin-top: clamp(2.5rem, 5vw, 4rem); padding-top: 1rem;
  border-top: 1px solid var(--line-2);
}
.note summary {
  display: inline-flex; align-items: center; min-height: 44px;
  list-style: none; cursor: pointer;
  font-size: var(--t-small); color: var(--muted);
  text-decoration: underline; text-decoration-color: var(--line-2);
  text-underline-offset: .22em; text-decoration-thickness: 1px;
  transition: color var(--dur-fast) var(--ease);
}
.note summary::-webkit-details-marker { display: none; }
.note summary::marker { content: ''; }
.note summary:hover { color: var(--ink); text-decoration-color: var(--ink); }
.note[open] summary { color: var(--ink); }
.note > p {
  max-width: var(--measure); padding-bottom: .5rem;
  font-size: var(--t-small); color: var(--muted);
}

.foot__bar a { display: inline-flex; align-items: center; min-height: 44px; }
.foot__bar {
  display: flex; flex-wrap: wrap; gap: .5rem 2rem; justify-content: space-between;
  margin-top: 1.25rem; padding-top: 0;
  font-size: var(--t-micro); color: var(--muted);
}
@media (max-width: 860px) { .foot__grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .foot__grid { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------- Reveal
   Maske liegt auf den Kindern von [data-reveal], nie auf dem beobachteten
   Element selbst (Spec §8 h). Zwei Ausprägungen: Text steigt leicht auf,
   Bilder werden von unten aufgedeckt. */

.js [data-reveal] > * {
  opacity: 0; transform: translate3d(0, 10px, 0);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.js [data-reveal].is-visible > * { opacity: 1; transform: none; }

.js figure[data-reveal] > img {
  opacity: 1; transform: none;
  clip-path: inset(100% 0 0 0);
  transition: clip-path 900ms var(--ease);
}
.js figure[data-reveal].is-visible > img { clip-path: inset(0 0 0 0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js [data-reveal] > *,
  .js figure[data-reveal] > img {
    opacity: 1 !important; transform: none !important;
    clip-path: none !important; transition: none !important;
  }
  .js .hero__img { animation: none; }
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}