/* ==========================================================================
   IBT Ingenieurbüro Tonn — Coming Soon (ruhig & informativ)
   Editorial: warmes Papier, Tannengrün, Ocker. Serif Fraunces · Sans Inter.
   ========================================================================== */

:root{
  --paper:#f3ede2;--paper-2:#fbf7f0;--paper-3:#ece3d3;
  --pine:#1e4435;--pine-2:#20493a;
  --ink:#1d201b;--ink-soft:#54574d;--ink-faint:#8a8c80;
  --on-pine:#eef2ea;
  --ochre:#bd7335;--ochre-soft:#d7a877;
  --line:#e2d9c8;--line-2:#d4c8b2;
  --shadow:0 1px 2px rgba(29,32,27,.05),0 18px 40px -20px rgba(29,32,27,.16);
  --serif:"Fraunces","Iowan Old Style",Georgia,serif;
  --sans:"Inter",system-ui,-apple-system,sans-serif;

  /* Motion-Tokens (transitions.dev) — gemeinsames Bewegungsvokabular */
  --ease-out:cubic-bezier(.22,1,.36,1);          /* smooth ease out */
  --rise-dur:.7s;--rise-dist:14px;--rise-blur:4px;--rise-stagger:90ms;
  /* Avatar-Group-Hover */
  --avatar-lift:-4px;--avatar-dur:320ms;--avatar-scale:1.05;--avatar-falloff:.45;
  --avatar-ease-in:cubic-bezier(.22,1,.36,1);
  --avatar-ease-out:cubic-bezier(.34,3.85,.64,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
::selection{background:var(--pine);color:var(--on-pine)}
a{color:inherit;text-decoration:none}

.wrap{max-width:64rem;margin:0 auto;padding:clamp(1.5rem,4vw,2.5rem)}

/* ---------- Logo ---------- */
.brand{display:inline-flex;align-items:center;gap:.7rem}
.logo-ibt{display:inline-flex;flex-direction:column;line-height:1}
.logo-ibt .rule{height:2px;background:var(--ochre);width:100%;border-radius:1px;margin-bottom:4px}
.logo-ibt .ibt{font-family:var(--serif);font-weight:600;font-size:1.7rem;letter-spacing:.04em;color:var(--ink)}
.logo-name{display:inline-flex;flex-direction:column;font-size:.64rem;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-faint);line-height:1.4;border-left:1px solid var(--line-2);padding-left:.65rem}
.logo-name span:first-child{color:var(--ink-soft)}

/* ---------- Kopf ---------- */
.top{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:clamp(2.5rem,6vw,4.5rem)}
.status{display:inline-flex;align-items:center;gap:.5rem;font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-soft);white-space:nowrap}
.status .pulse{width:.45rem;height:.45rem;border-radius:9999px;background:var(--ochre);animation:pulse 2.4s ease-out infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(189,115,53,.45)}70%{box-shadow:0 0 0 7px rgba(189,115,53,0)}100%{box-shadow:0 0 0 0 rgba(189,115,53,0)}}

/* ---------- Hero ---------- */
.hero{position:relative;max-width:42rem;margin-bottom:clamp(3rem,7vw,5rem)}
.kicker{font-size:.74rem;letter-spacing:.22em;text-transform:uppercase;color:var(--ochre);font-weight:500;margin-bottom:1.4rem;display:flex;align-items:center;gap:.85rem}
.kicker::before{content:"";width:1.75rem;height:1px;background:var(--ochre);opacity:.6}
h1{font-family:var(--serif);font-weight:400;font-size:clamp(2.4rem,6vw,3.9rem);line-height:1.05;letter-spacing:-.015em;margin-bottom:1.4rem;font-optical-sizing:auto}
h1 em{font-style:italic;color:var(--ochre)}
/* Coming-Soon-Headline: klare Sans statt kursiver Serife */
.hero h1{font-family:var(--sans);font-weight:600;font-size:clamp(2.5rem,6.5vw,4rem);letter-spacing:-.025em;line-height:1.06}
.hero h1 em{font-style:normal;color:var(--ochre)}
.lede{font-size:1.075rem;line-height:1.7;color:var(--ink-soft);max-width:34rem;margin-bottom:2rem}
.badges{display:flex;flex-wrap:wrap;gap:.5rem}
.badge{font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;font-weight:500;color:var(--ink-soft);padding:.4rem .8rem;border:1px solid var(--line);border-radius:9999px;background:var(--paper-2)}
/* Avatar-Group-Hover (transitions.dev #11): Comb-Interaktion auf der Badge-Reihe.
   translateY vor scale, damit scale den Lift nicht verstärkt. Easing wird per JS
   inline gesetzt (clean ease-in beim Hover, federnd beim Zurück). */
.t-avatar{transform-origin:center;transform:translateY(var(--shift,0px)) scale(var(--scale-active,1));transition:transform var(--avatar-dur) var(--avatar-ease-in);will-change:transform}
.t-avatar:hover{border-color:var(--ochre-soft);color:var(--ink)}

/* zarter Grundriss als Akzent */
.hero-art{position:absolute;top:-.5rem;right:-1rem;width:15rem;opacity:.16;pointer-events:none}
@media(max-width:860px){.hero-art{display:none}}

/* ---------- Leistungen ---------- */
.section-label{font-size:.74rem;letter-spacing:.2em;text-transform:uppercase;color:var(--ochre);font-weight:500;margin-bottom:1.25rem}
.services{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem;margin-bottom:clamp(3rem,7vw,4.5rem)}
@media(max-width:680px){.services{grid-template-columns:1fr}}
.svc{display:flex;gap:1rem;padding:1.4rem;border:1px solid var(--line);border-radius:1rem;background:var(--paper-2);transition:border-color .25s var(--ease-out),transform .25s var(--ease-out),box-shadow .25s var(--ease-out);box-shadow:var(--shadow)}
.svc:hover{border-color:var(--ochre-soft);transform:translateY(-3px);box-shadow:0 1px 2px rgba(29,32,27,.05),0 26px 50px -22px rgba(29,32,27,.22)}
.svc .ic{width:2rem;height:2rem;color:var(--pine);flex-shrink:0}
.svc h3{font-family:var(--serif);font-weight:600;font-size:1.15rem;margin-bottom:.25rem;line-height:1.2}
.svc p{font-size:.88rem;color:var(--ink-soft)}
.svc .soon{display:inline-block;margin-top:.5rem;font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ochre);background:rgba(189,115,53,.09);border:1px solid rgba(189,115,53,.22);border-radius:9999px;padding:.15rem .5rem}

/* ---------- Kontakt ---------- */
.contact{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:2rem 0;margin-bottom:2.5rem;display:flex;flex-wrap:wrap;gap:1.5rem 3rem}
.contact .block .lbl{font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-faint);margin-bottom:.45rem}
.contact a{font-size:1.05rem;color:var(--ink);display:inline-flex;align-items:center;gap:.55rem;transition:color .18s}
.contact a:hover{color:var(--ochre)}
.contact a svg{width:1.1rem;height:1.1rem;color:var(--pine)}
.contact .who{font-size:.95rem;color:var(--ink-soft)}
.contact .who b{color:var(--ink);font-weight:600;font-family:var(--serif)}

/* ---------- Fußzeile ---------- */
.foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.75rem 1.5rem;font-size:.8rem;color:var(--ink-faint)}
.foot nav{display:flex;gap:1.4rem}
.foot nav a{position:relative;transition:color .18s}
.foot nav a::after{content:"";position:absolute;left:0;bottom:-2px;width:100%;height:1px;background:var(--ochre);transform:scaleX(0);transform-origin:left;transition:transform .22s}
.foot nav a:hover{color:var(--ink)}
.foot nav a:hover::after{transform:scaleX(1)}

/* ---------- Scroll-Reveal (transitions.dev "texts reveal" #18) ----------
   Elemente starten nach unten versetzt + geblurrt + unsichtbar; .is-in (per
   IntersectionObserver gesetzt) löst den gestaffelten Auftritt aus. --si gibt
   den Stagger-Index innerhalb einer Gruppe vor. Eintritt einmalig, kein Replay. */
.js [data-reveal]{opacity:0;transform:translateY(var(--rise-dist));filter:blur(var(--rise-blur));
  transition:opacity var(--rise-dur) var(--ease-out),transform var(--rise-dur) var(--ease-out),filter var(--rise-dur) var(--ease-out);
  transition-delay:calc(var(--si,0) * var(--rise-stagger));will-change:transform,opacity,filter}
.js [data-reveal].is-in{opacity:1;transform:none;filter:blur(0)}

/* ==========================================================================
   Rechts-Unterseiten (Impressum / Datenschutz)
   ========================================================================== */
.doc{max-width:44rem;margin:0 auto;padding:clamp(2rem,5vw,3.5rem) clamp(1.5rem,4vw,2rem) 4rem}
.back{display:inline-flex;align-items:center;gap:.45rem;font-size:.85rem;color:var(--ink-soft);margin-bottom:2.5rem;transition:.18s}
.back:hover{color:var(--ochre);gap:.65rem}
.back svg{width:1rem;height:1rem}
.doc h1{font-family:var(--serif);font-weight:400;font-size:clamp(2rem,5vw,2.6rem);margin-bottom:2.5rem}
.doc-hairline{height:1px;background:var(--line);border:0;margin:0 0 2.5rem}
.doc section{margin-bottom:2rem}
.doc h2{font-family:var(--serif);font-weight:600;font-size:1.15rem;color:var(--ink);margin-bottom:.75rem}
.doc h3{font-size:.9rem;font-weight:600;color:var(--ink);margin:1rem 0 .4rem}
.doc p{font-size:.95rem;color:var(--ink-soft);margin-bottom:.7rem}
.doc strong{color:var(--ink);font-weight:600}
.doc a{color:var(--ochre);text-decoration:underline;text-underline-offset:2px}
.doc ul{list-style:none;margin:.5rem 0}
.doc li{display:flex;align-items:flex-start;gap:.6rem;font-size:.95rem;color:var(--ink-soft);margin-bottom:.4rem}
.doc li::before{content:"";width:.4rem;height:.4rem;border-radius:9999px;background:var(--pine);flex-shrink:0;margin-top:.55rem}

@media(prefers-reduced-motion:reduce){
  .js [data-reveal],.js [data-reveal].is-in{opacity:1;transform:none;filter:none;transition:none}
  .t-avatar{transition:none!important;transform:none!important}
  .status .pulse{animation:none}
}