/* ============================================================
   GoToSec v5 — „Der Schnitt"
   Welt: der Tageslichtschnitt aus der Architekturzeichnung.
   Die SAP-Landschaft ist ein aufgeschnittenes Haus. Erkennung
   ist das Licht, das beim Scrollen die Geschosse hinabwandert.
   Signatur: Poché-Schwarz, Sonnengold, geneigte Grotesk,
   abgeschrägte Ecken, Verweislinien mit Punkt.
   ============================================================ */

:root{
  /* Palette — Weltvorgabe „Daylight Section" */
  --limewash:      #F2EFEA;
  --limewash-lo:   #E8E4DC;
  --poche:       #1C1F22;
  --poche-soft:  #2A2E33;
  --sunbeam:     #D6A43A;   /* Fläche, Band, Punkt — nie Fließtext */
  --sunbeam-hi:  #E4B44C;   /* Gold im Hover */
  --sunbeam-ink: #7A5610;   /* Gold als Text auf Kalkweiß (WCAG AA) */
  --shadow-blue: #5B6B7C;
  --mortar:      #D9DCDD;
  --stone:       #A8A39A;

  --ink:      #1C1F22;
  --ink-mid:  #4A5560;   /* Nebentext, aus dem Blau getönt */
  --ink-dim:  #F2EFEA;   /* Text auf Poché */
  --ink-dim2: #B9C0C7;   /* Nebentext auf Poché */

  --line:      rgba(28,31,34,.20);
  --line-soft: rgba(28,31,34,.10);
  --line-dark: rgba(242,239,234,.18);

  --chamfer: 11px;
  --max-width: 1240px;
  --nav-h: 76px;

  --f-disp: "Barlow Condensed", "Helvetica Neue", Arial, sans-serif;
  --f-body: "Barlow", "Helvetica Neue", Arial, sans-serif;

  color-scheme: light;
  accent-color: var(--sunbeam-ink);
}

/* ---------- Basis ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{
  -webkit-text-size-adjust:100%;
  scrollbar-color: var(--stone) var(--limewash-lo);
}
body{
  font-family:var(--f-body);
  font-size:17px;
  line-height:1.62;
  color:var(--ink);
  background:var(--limewash);
  caret-color:var(--sunbeam-ink);
  overflow-x:clip;
}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
::selection{background:var(--sunbeam);color:var(--poche)}
:focus-visible{
  outline:2px solid var(--sunbeam-ink);
  outline-offset:3px;
}
::-webkit-scrollbar{width:11px;height:11px}
::-webkit-scrollbar-track{background:var(--limewash-lo)}
::-webkit-scrollbar-thumb{background:var(--stone)}
::-webkit-scrollbar-thumb:hover{background:var(--shadow-blue)}

@media (prefers-reduced-motion: no-preference){
  html{scroll-behavior:smooth}
}

.container{
  max-width:var(--max-width);
  margin-inline:auto;
  padding-inline:clamp(20px,4vw,48px);
}
.sr-only{
  position:absolute;width:1px;height:1px;overflow:hidden;
  clip-path:inset(50%);white-space:nowrap;
}

/* ---------- Typo-Rollen ---------- */
.display{
  font-family:var(--f-disp);
  font-style:italic;
  font-weight:600;
  text-transform:uppercase;
  line-height:.94;
  letter-spacing:-.015em;
  font-size:clamp(2.6rem,6.2vw,5.4rem);
  text-wrap:balance;
}
.display--md{font-size:clamp(2rem,4vw,3.4rem)}
.display--sm{font-size:clamp(1.5rem,2.4vw,2.1rem)}

.label{
  font-family:var(--f-disp);
  font-style:italic;
  font-weight:600;
  text-transform:uppercase;
  font-size:.76rem;
  letter-spacing:.16em;
  color:var(--ink-mid);
}
.num{
  font-family:var(--f-disp);
  font-weight:500;
  font-variant-numeric:tabular-nums lining-nums;
  letter-spacing:.01em;
}
.lead{
  font-size:clamp(1.05rem,1.35vw,1.2rem);
  line-height:1.6;
  max-width:66ch;
}
.sub{
  margin-top:1rem;
  color:var(--ink-mid);
  font-size:1rem;
  max-width:62ch;
}

/* ---------- Schaltflächen (abgeschrägt) ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.6rem;
  font-family:var(--f-disp);
  font-style:italic;font-weight:600;
  text-transform:uppercase;
  font-size:.86rem;letter-spacing:.11em;
  padding:.85rem 1.5rem;
  background:var(--sunbeam);
  color:var(--poche);
  clip-path:polygon(
    var(--chamfer) 0, 100% 0, 100% calc(100% - var(--chamfer)),
    calc(100% - var(--chamfer)) 100%, 0 100%, 0 var(--chamfer));
  transition:background .16s ease-out;
}
.btn:hover{background:var(--sunbeam-hi)}
.btn:focus-visible{
  outline:none;
  box-shadow:inset 0 0 0 2px var(--poche);
}
.btn svg{flex:0 0 auto}

.btn--ghost{
  background:transparent;
  color:var(--ink);
  box-shadow:inset 0 0 0 1px var(--line);
  transition:box-shadow .16s ease-out,color .16s ease-out;
}
.btn--ghost:hover{
  background:transparent;
  box-shadow:inset 0 0 0 1px var(--sunbeam-ink);
  color:var(--sunbeam-ink);
}
.btn--ghost:focus-visible{box-shadow:inset 0 0 0 2px var(--sunbeam-ink)}

.btn--dark{background:var(--limewash);color:var(--poche)}
.btn--dark:hover{background:#fff}

/* ---------- Navigation ---------- */
.nav{
  position:fixed;inset:0 0 auto 0;z-index:60;
  height:var(--nav-h);
  display:flex;align-items:center;justify-content:space-between;
  gap:1.5rem;
  padding-inline:clamp(20px,4vw,48px);
  background:rgba(242,239,234,0);
  border-bottom:1px solid transparent;
  transition:background .25s ease-out,border-color .25s ease-out;
}
.nav.is-scrolled{
  background:var(--limewash);
  border-bottom-color:var(--line-soft);
}
.nav__logo img{height:38px;width:auto}
.nav__links{display:flex;gap:clamp(1.1rem,2.4vw,2.2rem)}
.nav__links a{
  font-family:var(--f-disp);
  font-style:italic;font-weight:600;
  text-transform:uppercase;
  font-size:.82rem;letter-spacing:.13em;
  color:var(--ink-mid);
  transition:color .16s ease-out;
}
.nav__links a:hover{color:var(--ink)}
.nav__cta{padding:.6rem 1.1rem;font-size:.78rem;--chamfer:9px}
.nav__toggle{display:none}

@media (max-width: 899px){
  .nav__cta{display:none}
  .nav__toggle{
    display:grid;place-items:center;z-index:70;
    width:44px;height:44px;
    box-shadow:inset 0 0 0 1px var(--line);
    clip-path:polygon(9px 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%,0 9px);
  }
  .nav__toggle-box{display:grid;gap:5px;width:19px}
  .nav__toggle-line{
    height:2px;background:var(--ink);
    transition:transform .24s ease-out,opacity .18s ease-out;
  }
  .nav__toggle.is-open .nav__toggle-line:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav__toggle.is-open .nav__toggle-line:nth-child(2){opacity:0}
  .nav__toggle.is-open .nav__toggle-line:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

  .js .nav__links{
    position:fixed;inset:0;z-index:65;
    background:var(--limewash);
    flex-direction:column;align-items:flex-start;justify-content:center;
    gap:.2rem;
    padding:5rem clamp(24px,8vw,64px) 4rem;
    opacity:0;visibility:hidden;
    transition:opacity .22s ease-out,visibility .22s ease-out;
  }
  .js .nav__links.is-open{opacity:1;visibility:visible}
  .js .nav__links a{
    font-size:clamp(2.1rem,9vw,3.2rem);
    letter-spacing:-.01em;color:var(--ink);
  }
  html.menu-open{overflow:hidden}
  html:not(.js) .nav{position:static;height:auto;flex-wrap:wrap;padding-block:.9rem}
  html:not(.js) .nav__toggle{display:none}
  html:not(.js) .nav__links{width:100%;flex-wrap:wrap;gap:1rem;padding-block:.5rem}
}

.skip-link{
  position:fixed;top:12px;left:12px;z-index:100;
  transform:translateY(-320%);
  background:var(--sunbeam);color:var(--poche);
  font-family:var(--f-disp);font-style:italic;font-weight:600;
  text-transform:uppercase;font-size:.8rem;letter-spacing:.12em;
  padding:.7rem 1.1rem;
  transition:transform .2s ease-out;
}
.skip-link:focus{transform:none}

/* ============================================================
   Das Rückgrat: der Turm
   ============================================================ */
.spine{
  padding-top:calc(var(--nav-h) + clamp(2rem,5vw,4.5rem));
  padding-bottom:clamp(3rem,7vw,7rem);
  position:relative;
}
.spine__inner{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(2rem,4vw,3rem);
  align-items:start;
}
@media (min-width: 1000px){
  .spine__inner{
    grid-template-columns:minmax(0,1fr) minmax(120px,150px) minmax(320px,520px);
    gap:clamp(1.5rem,3vw,3rem);
  }
  .spine__text{position:sticky;top:calc(var(--nav-h) + 2rem)}
  .spine__rail{position:sticky;top:calc(var(--nav-h) + 2rem)}
  /* Der Rand verlängert die Rasterzeile: nur so bleibt der klebende Text
     angeheftet, solange der Turm vorbeizieht. */
  .turm{margin-bottom:clamp(2rem,10vh,7rem)}
}

.spine__text .lead{margin-top:1.6rem}
.cta-row{
  display:flex;flex-wrap:wrap;gap:.85rem;
  margin-top:clamp(1.6rem,3vw,2.4rem);
}

/* Kennzahlen als Verweislinien-Rail */
.rail{display:grid;gap:1.5rem}
.rail__item{position:relative;padding-left:1.4rem}
.rail__item::before{ /* Punkt am Ansatz */
  content:"";position:absolute;left:0;top:.72rem;
  width:7px;height:7px;border-radius:50%;
  background:var(--sunbeam);
}
.rail__item::after{ /* Verweislinie */
  content:"";position:absolute;left:7px;top:calc(.72rem + 3px);
  width:.8rem;height:1px;background:var(--line);
}
.rail dd{
  font-family:var(--f-disp);font-weight:500;
  font-variant-numeric:tabular-nums lining-nums;
  font-size:clamp(1.7rem,2.6vw,2.3rem);
  line-height:1;letter-spacing:-.01em;
}
.rail dt{
  font-family:var(--f-disp);font-style:italic;font-weight:600;
  text-transform:uppercase;font-size:.68rem;letter-spacing:.15em;
  color:var(--ink-mid);margin-top:.35rem;
}
@media (max-width: 999px){
  .rail{grid-template-columns:repeat(2,1fr);gap:1.2rem 1rem}
}

/* Auf schmalen Schirmen decken sechs Schilder die Zeichnung zu. Die
   Zusatzzeile steht ohnehin in der Legende darunter. */
@media (max-width: 720px){
  .floors li{max-width:56%;padding:.34rem .5rem .38rem}
  .floors .fl__tag{display:none}
  .floors .fl__name{font-size:.76rem}
  .floors .fl__key{font-size:.66rem}
}

/* Der Turm selbst */
.turm{position:relative;overflow:clip}
.turm__base{width:100%;display:block}
.turm__lit{
  /* Die beleuchtete Fassung ist eine eigene Datei (Dreiton-Kurve), kein
     CSS-Filter — ein Filter über einem 1408px-Bild kostet jeden Scroll-Frame. */
  position:absolute;inset:0;
  /* Pfad relativ zu dieser CSS-Datei, nicht zum Dokument. */
  background-image:url('../../../media/v5/schnitt-turm-licht.webp');
  background-size:100% 100%;
  background-repeat:no-repeat;
  -webkit-mask-image:linear-gradient(180deg,transparent 0%,#000 16%,#000 84%,transparent 100%);
          mask-image:linear-gradient(180deg,transparent 0%,#000 16%,#000 84%,transparent 100%);
  -webkit-mask-size:100% 34%;
          mask-size:100% 34%;
  -webkit-mask-repeat:no-repeat;
          mask-repeat:no-repeat;
  -webkit-mask-position:0 var(--beam,-60%);
          mask-position:0 var(--beam,-60%);
  pointer-events:none;
}
.turm__edge{ /* die Vorderkante des Lichts */
  position:absolute;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--sunbeam) 18%,var(--sunbeam) 82%,transparent);
  top:var(--edge,-26%);
  opacity:.75;
  pointer-events:none;
}

/* Geschoss-Beschriftungen auf der Zeichnung */
.floors{position:absolute;inset:0;pointer-events:none}
.floors li{
  position:absolute;
  top:var(--y);
  transform:translateY(-50%);
  background:var(--limewash);
  box-shadow:inset 0 0 0 1px var(--line);
  padding:.42rem .6rem .46rem;
  max-width:47%;
  transition:box-shadow .3s ease-out;
}
.floors li[data-side="left"]{left:4%}
.floors li[data-side="right"]{right:4%;text-align:right}
.floors .fl__key{
  font-family:var(--f-disp);font-weight:500;
  font-variant-numeric:tabular-nums lining-nums;
  font-size:.72rem;letter-spacing:.06em;
  color:var(--ink-mid);
  transition:color .3s ease-out;
}
.floors .fl__name{
  display:block;
  font-family:var(--f-disp);font-style:italic;font-weight:600;
  text-transform:uppercase;
  font-size:.82rem;letter-spacing:.05em;line-height:1.15;
  color:var(--ink-mid);
  transition:color .3s ease-out;
}
.floors .fl__tag{
  display:block;
  font-size:.72rem;line-height:1.3;
  color:var(--ink-mid);
  margin-top:.1rem;
}
.floors li.is-lit{box-shadow:inset 0 0 0 1px var(--sunbeam)}
.floors li.is-lit .fl__key{color:var(--sunbeam-ink)}
.floors li.is-lit .fl__name{color:var(--poche)}

.scroll-hint{
  display:flex;align-items:center;gap:.55rem;
  justify-content:flex-end;
  margin-top:1.6rem;
  font-family:var(--f-disp);font-style:italic;font-weight:600;
  text-transform:uppercase;font-size:.68rem;letter-spacing:.15em;
  color:var(--ink-mid);
}
.scroll-hint .dot{
  width:6px;height:6px;border-radius:50%;background:var(--sunbeam);
}

/* ============================================================
   Legende — die acht Leistungen
   ============================================================ */
.section{padding-block:clamp(3.5rem,8vw,7rem)}
.section__head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:1.5rem;flex-wrap:wrap;
  padding-bottom:1.2rem;
  border-bottom:1px solid var(--ink);
}
.section__note{color:var(--ink-mid);font-size:.95rem;max-width:44ch}

.legend{
  display:grid;
  grid-template-columns:1fr;
  column-gap:clamp(2rem,5vw,4.5rem);
}
@media (min-width: 800px){.legend{grid-template-columns:1fr 1fr}}
.legend li{
  display:grid;
  grid-template-columns:2.6rem 1fr auto;
  align-items:baseline;
  gap:.4rem 1rem;
  padding-block:1rem;
  border-bottom:1px solid var(--line-soft);
}
.legend .lg__key{
  font-family:var(--f-disp);font-weight:500;
  font-variant-numeric:tabular-nums lining-nums;
  font-size:.9rem;color:var(--sunbeam-ink);
}
.legend .lg__name{
  font-family:var(--f-disp);font-style:italic;font-weight:600;
  text-transform:uppercase;
  font-size:clamp(1.02rem,1.5vw,1.22rem);letter-spacing:.03em;
  line-height:1.2;
}
.legend .lg__tag{
  grid-column:2;
  font-size:.85rem;color:var(--ink-mid);
}
.legend .lg__ref{
  font-family:var(--f-disp);font-weight:500;
  font-variant-numeric:tabular-nums lining-nums;
  font-size:.74rem;letter-spacing:.1em;
  color:var(--ink-mid);
  white-space:nowrap;
}

/* ============================================================
   Das Prinzip — Poché-Band
   ============================================================ */
.principle{
  background:var(--poche);
  color:var(--ink-dim);
  padding-block:clamp(3.5rem,8vw,7rem);
}
.principle .display{max-width:18ch}
.principle p{color:var(--ink-dim2);max-width:58ch;margin-top:1.2rem}
.joint{
  display:grid;
  grid-template-columns:1fr;
  gap:1px;
  margin-top:clamp(2.5rem,5vw,4rem);
  background:var(--line-dark);
  box-shadow:0 0 0 1px var(--line-dark);
}
@media (min-width: 760px){.joint{grid-template-columns:1fr auto 1fr}}
.joint__side{
  background:var(--poche);
  padding:clamp(1.5rem,3vw,2.4rem);
}
.joint__side h3{
  font-family:var(--f-disp);font-style:italic;font-weight:600;
  text-transform:uppercase;
  font-size:clamp(1.2rem,2vw,1.7rem);letter-spacing:.03em;line-height:1.1;
}
.joint__side p{margin-top:.7rem;font-size:.95rem;color:var(--ink-dim2)}
.joint__mid{
  background:var(--poche);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:.7rem;text-align:center;
  padding:clamp(1.2rem,3vw,2.4rem);
  font-family:var(--f-disp);font-style:italic;font-weight:600;
  text-transform:uppercase;font-size:.7rem;letter-spacing:.15em;
  color:var(--sunbeam);
  min-width:clamp(120px,14vw,180px);
}
.joint__mid .dot{
  display:block;width:9px;height:9px;border-radius:50%;
  background:var(--sunbeam);
}

/* ============================================================
   Prüfvermerke — die Kundenstimmen
   ============================================================ */
.quotes{
  display:grid;grid-template-columns:1fr;
  gap:clamp(1.5rem,3vw,2.5rem);
  margin-top:clamp(2rem,4vw,3rem);
}
@media (min-width: 820px){.quotes{grid-template-columns:1fr 1fr}}
.quote{
  border-top:2px solid var(--sunbeam);
  padding-top:1.4rem;
}
.quote blockquote{
  font-size:clamp(1.02rem,1.5vw,1.16rem);
  line-height:1.55;
  max-width:44ch;
}
.quote cite{
  display:block;margin-top:1.2rem;
  font-family:var(--f-disp);font-style:italic;font-weight:600;
  text-transform:uppercase;font-size:.76rem;letter-spacing:.14em;
  color:var(--sunbeam-ink);
}

/* ============================================================
   Schluss-Aufruf
   ============================================================ */
.close{
  padding-block:clamp(4rem,9vw,8rem);
  border-top:1px solid var(--ink);
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(2.5rem,5vw,4rem);
  align-items:start;
}
@media (min-width: 900px){
  .close{grid-template-columns:minmax(0,1fr) minmax(240px,340px)}
}
.close .display{max-width:14ch}
.close p{margin-top:1.2rem;max-width:52ch;color:var(--ink-mid)}
.close__aside-head{
  font-family:var(--f-disp);font-style:italic;font-weight:600;
  text-transform:uppercase;font-size:.76rem;letter-spacing:.16em;
  color:var(--ink-mid);
  padding-bottom:.8rem;border-bottom:1px solid var(--ink);
}
.branches li{
  padding-block:.72rem;
  border-bottom:1px solid var(--line-soft);
  font-family:var(--f-disp);font-style:italic;font-weight:600;
  text-transform:uppercase;font-size:.94rem;letter-spacing:.04em;
}

/* ============================================================
   Schriftfeld — die Fußzeile als Architekten-Titelblock
   ============================================================ */
.titleblock{padding-block:0 2.5rem}
.tb__grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:1px;
  background:var(--line);
  box-shadow:0 0 0 1px var(--line);
  border-top:2px solid var(--ink);
  margin-bottom:1.5rem;
}
@media (min-width: 720px){.tb__grid{grid-template-columns:repeat(4,1fr)}}
.tb__cell{
  background:var(--limewash);
  padding:1.1rem 1.2rem 1.3rem;
}
.tb__cell dt{
  font-family:var(--f-disp);font-style:italic;font-weight:600;
  text-transform:uppercase;font-size:.66rem;letter-spacing:.16em;
  color:var(--ink-mid);margin-bottom:.5rem;
}
.tb__cell dd{
  font-size:.94rem;line-height:1.45;
  font-variant-numeric:tabular-nums lining-nums;
}
.tb__cell a{
  text-decoration:underline;
  text-decoration-color:var(--line);
  text-underline-offset:.22em;
  transition:text-decoration-color .16s ease-out;
}
.tb__cell a:hover{text-decoration-color:var(--sunbeam-ink)}
.tb__legal{
  display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  font-family:var(--f-disp);font-style:italic;
  text-transform:uppercase;font-size:.7rem;letter-spacing:.13em;
  color:var(--ink-mid);
}

html:not(.js) .turm__lit{-webkit-mask-image:none;mask-image:none}
html:not(.js) .turm__edge{display:none}
html:not(.js) .floors li{box-shadow:inset 0 0 0 1px var(--sunbeam)}
html:not(.js) .floors .fl__key{color:var(--sunbeam-ink)}
html:not(.js) .floors .fl__name{color:var(--poche)}
html:not(.js) .scroll-hint{display:none}

/* ============================================================
   Bewegung — ein einziger orchestrierter Moment
   ============================================================ */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  .turm__lit{-webkit-mask-image:none;mask-image:none}
  .turm__edge{display:none}
  .floors li{box-shadow:inset 0 0 0 1px var(--sunbeam)}
  .floors .fl__key{color:var(--sunbeam-ink)}
  .floors .fl__name{color:var(--poche)}
  .scroll-hint{display:none}
}