/* ==========================================================
   Penthouse An der alten Schule — Design System
   ========================================================== */

:root{
  --bg:        #14130f;
  --bg-alt:    #1c1a15;
  --bg-alt-2:  #211f19;
  --paper:     #efe9db;
  --ink:       #ece6d8;
  --ink-soft:  #b6ac97;
  --ink-faint: #948c7c;
  --accent:    #b6905a;
  --accent-2:  #d8b57e;
  --line:      rgba(236,230,216,0.14);
  --line-strong: rgba(236,230,216,0.28);
  --ok:        #8faa86;

  --serif: "Fraunces", "Iowan Old Style", Georgia, serif;
  --sans:  "Work Sans", "Segoe UI", sans-serif;
  --mono:  "IBM Plex Mono", ui-monospace, monospace;

  --radius: 2px;
  --max: 1180px;

  --space-1: clamp(0.5rem, 0.4rem + 0.4vw, 0.75rem);
  --space-2: clamp(1rem, 0.8rem + 0.8vw, 1.5rem);
  --space-3: clamp(1.75rem, 1.4rem + 1.4vw, 2.75rem);
  --space-4: clamp(3rem, 2.2rem + 3vw, 5.5rem);
  --space-5: clamp(4.5rem, 3.4rem + 4.5vw, 8rem);
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{ max-width:100%; display:block; }
a{ color:inherit; }
.container{
  max-width:var(--max);
  margin-inline:auto;
  padding-inline:clamp(1.25rem, 4vw, 2.5rem);
}

h1,h2,h3{
  font-family:var(--serif);
  font-weight:600;
  letter-spacing:-0.01em;
  margin:0 0 0.4em;
  color:var(--paper);
}
h1{ font-size:clamp(2.4rem, 1.7rem + 3.2vw, 4.6rem); line-height:1.03; font-weight:500; }
h2{ font-size:clamp(1.7rem, 1.4rem + 1.4vw, 2.5rem); font-weight:500; }
h3{ font-size:clamp(1.15rem, 1.05rem + 0.5vw, 1.4rem); font-weight:600; }
p{ margin:0 0 1em; color:var(--ink-soft); max-width:62ch; }
.lede{ font-size:clamp(1.05rem,1rem + 0.3vw,1.25rem); color:var(--ink); }

.eyebrow{
  font-family:var(--mono);
  font-size:0.72rem;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--accent-2);
  display:flex;
  align-items:center;
  gap:0.6em;
  margin-bottom:var(--space-2);
}
.eyebrow::before{
  content:"";
  width:26px; height:1px;
  background:var(--accent);
  display:inline-block;
}

/* ---------- Buttons (big, thumb-friendly) ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:0.6em;
  font-family:var(--sans);
  font-weight:600;
  font-size:1rem;
  padding:1.05em 1.9em;
  border-radius:var(--radius);
  border:1px solid transparent;
  cursor:pointer;
  text-decoration:none;
  min-height:52px;
  transition:transform .15s ease, background .2s ease, border-color .2s ease, color .2s ease;
  -webkit-tap-highlight-color: transparent;
}
.btn:active{ transform:scale(0.98); }
.btn-primary{
  background:var(--accent);
  color:#171410;
}
.btn-primary:hover{ background:var(--accent-2); }
.btn-ghost{
  background:transparent;
  border-color:var(--line-strong);
  color:var(--paper);
}
.btn-ghost:hover{ border-color:var(--accent); color:var(--accent-2); }
.btn-block{ width:100%; }

/* ---------- Header ---------- */
.site-header{
  position:sticky; top:0; z-index:40;
  background:rgba(20,19,15,0.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.site-header .container{
  display:flex; align-items:center; justify-content:space-between;
  padding-block:0.9rem;
}
.brand{
  font-family:var(--serif);
  font-size:1.15rem;
  color:var(--paper);
  text-decoration:none;
  letter-spacing:0.01em;
}
.brand strong{ color:var(--accent-2); font-weight:600; }
.header-cta{ font-size:0.92rem; padding:0.8em 1.4em; min-height:44px; }

/* ---------- Hero ---------- */
.hero{
  position:relative;
  min-height:min(92vh, 820px);
  display:flex;
  align-items:flex-end;
  padding-top:6rem;
}
.hero-media{
  position:absolute; inset:0;
  background-size:cover;
  background-position:center 68%;
}
.hero-media::after{
  content:"";
  position:absolute; inset:0;
  background:
    linear-gradient(180deg, rgba(20,19,15,0.55) 0%, rgba(20,19,15,0.25) 32%, rgba(20,19,15,0.86) 88%, var(--bg) 100%);
}
.hero-content{ position:relative; z-index:2; padding-bottom:var(--space-4); width:100%; }
.hero-tag{
  font-family:var(--mono);
  font-size:0.75rem; letter-spacing:0.14em; text-transform:uppercase;
  color:var(--accent-2);
  margin-bottom:0.9rem;
}
.hero h1{ max-width:14ch; }
.hero .lede{ max-width:44ch; margin-top:0.9rem; }
.hero-cta-row{ display:flex; flex-wrap:wrap; gap:1rem; margin-top:2rem; }

.stat-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);
  margin-top:var(--space-4);
}
.stat{
  padding:1.3rem clamp(0.6rem,2vw,1.4rem);
  border-right:1px solid var(--line);
}
.stat:last-child{ border-right:none; }
.stat .n{
  font-family:var(--mono);
  font-size:clamp(1.15rem,1rem + 1vw,1.7rem);
  color:var(--paper);
  display:block;
}
.stat .l{
  font-size:0.72rem;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--ink-faint);
  margin-top:0.35rem;
  display:block;
}

/* ---------- Rooftop divider (signature element) ---------- */
.skyline{
  width:100%; height:auto; display:block;
  color:var(--line-strong);
}
.skyline path{ stroke:currentColor; }
.section-divider{
  padding-block:var(--space-3);
  overflow:hidden;
}

/* ---------- Sections ---------- */
section{ padding-block:var(--space-4); }
.section-alt{ background:var(--bg-alt); }
.two-col{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:var(--space-4);
  align-items:start;
}
@media (max-width:820px){
  .two-col{ grid-template-columns:1fr; gap:var(--space-3); }
}

.fact-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  margin-top:var(--space-3);
}
.fact{
  background:var(--bg);
  padding:1.4rem 1.3rem;
}
.fact .l{ font-size:0.72rem; letter-spacing:0.08em; text-transform:uppercase; color:var(--ink-faint); }
.fact .v{ font-family:var(--mono); font-size:1.05rem; color:var(--paper); margin-top:0.3rem; }
@media (max-width:700px){ .fact-grid{ grid-template-columns:repeat(2,1fr); } }

/* ---------- Gallery ---------- */
.gallery{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:0.5rem;
  margin-top:var(--space-3);
}
.gallery a{
  display:block;
  overflow:hidden;
  aspect-ratio:4/3;
  position:relative;
}
.gallery a.tall{ grid-row:span 2; aspect-ratio:auto; }
.gallery img{
  width:100%; height:100%; object-fit:cover;
  transition:transform .5s cubic-bezier(.2,.7,.2,1);
}
.gallery a:hover img{ transform:scale(1.04); }
@media (max-width:900px){ .gallery{ grid-template-columns:repeat(2,1fr); } .gallery a.tall{ grid-row:span 1; aspect-ratio:4/3; } }

/* Lightbox (pure CSS, target-based) */
.lightbox{
  position:fixed; inset:0; z-index:100;
  background:rgba(10,9,7,0.94);
  display:flex; align-items:center; justify-content:center;
  padding:4vh 4vw;
  opacity:0; pointer-events:none;
  transition:opacity .25s ease;
}
.lightbox:target{ opacity:1; pointer-events:auto; }
.lightbox img{ max-width:100%; max-height:88vh; margin-inline:auto; }
.lightbox-close{
  position:absolute; top:1.5rem; right:1.5rem;
  width:48px; height:48px;
  display:flex; align-items:center; justify-content:center;
  border:1px solid var(--line-strong);
  color:var(--paper); text-decoration:none;
  border-radius:50%;
  font-size:1.3rem;
}

/* ---------- Investor callout ---------- */
.callout{
  border:1px solid var(--line-strong);
  padding:var(--space-3);
  position:relative;
}
.callout::before{
  content:"";
  position:absolute; left:0; top:0; bottom:0; width:3px;
  background:var(--accent);
}
.rendite-row{
  display:flex; justify-content:space-between; align-items:baseline;
  padding-block:0.8rem;
  border-bottom:1px solid var(--line);
  gap:1rem;
}
.rendite-row:last-child{ border-bottom:none; }
.rendite-row .k{ color:var(--ink-soft); font-size:0.95rem; }
.rendite-row .v{ font-family:var(--mono); color:var(--accent-2); font-size:1.15rem; white-space:nowrap; }

/* ---------- Form ---------- */
.form-wrap{
  background:var(--bg-alt-2);
  border:1px solid var(--line);
  padding:var(--space-3);
}
.field{ margin-bottom:1.2rem; }
.field label{
  display:block;
  font-size:0.82rem;
  letter-spacing:0.02em;
  color:var(--ink-soft);
  margin-bottom:0.5rem;
}
.field input, .field select, .field textarea{
  width:100%;
  background:var(--bg);
  border:1px solid var(--line-strong);
  color:var(--ink);
  padding:0.9em 1em;
  font-family:var(--sans);
  font-size:1rem;
  border-radius:var(--radius);
  min-height:52px;
}
.field textarea{ min-height:120px; resize:vertical; }
.field input:focus, .field select:focus, .field textarea:focus{
  outline:2px solid var(--accent);
  outline-offset:1px;
  border-color:var(--accent);
}
.field-row{ display:grid; grid-template-columns:1fr 1fr; gap:1rem; }
@media (max-width:600px){ .field-row{ grid-template-columns:1fr; } }
.radio-group{ display:flex; gap:0.75rem; flex-wrap:wrap; }
.radio-pill{
  border:1px solid var(--line-strong);
  padding:0.8em 1.3em;
  border-radius:999px;
  cursor:pointer;
  font-size:0.92rem;
  min-height:44px;
  display:flex; align-items:center;
}
.radio-pill input{ margin-right:0.55em; accent-color:var(--accent); }
.consent{ display:flex; gap:0.7em; align-items:flex-start; font-size:0.85rem; color:var(--ink-faint); }
.consent input{ margin-top:0.3em; accent-color:var(--accent); flex-shrink:0; width:18px; height:18px; }
.hp-field{ position:absolute; left:-9999px; top:-9999px; opacity:0; }

/* ---------- Footer ---------- */
footer{
  border-top:1px solid var(--line);
  padding-block:var(--space-3);
}
.legal{ font-size:0.82rem; color:var(--ink-faint); max-width:none; }
.legal strong{ color:var(--ink-soft); }
.footer-grid{
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:1.5rem;
  margin-bottom:var(--space-2);
}

/* ---------- Back to top ---------- */
#top-btn{
  position:fixed;
  right:1.1rem; bottom:1.1rem;
  width:54px; height:54px;
  border-radius:50%;
  background:var(--accent);
  color:#171410;
  border:none;
  display:flex; align-items:center; justify-content:center;
  font-size:1.4rem;
  cursor:pointer;
  box-shadow:0 6px 18px rgba(0,0,0,0.35);
  opacity:0; pointer-events:none;
  transform:translateY(10px);
  transition:opacity .25s ease, transform .25s ease;
  z-index:60;
}
#top-btn.show{ opacity:1; pointer-events:auto; transform:translateY(0); }
#top-btn:active{ transform:scale(0.94); }

/* ---------- Badge ---------- */
.badge{
  display:inline-flex; align-items:center; gap:0.5em;
  font-family:var(--mono); font-size:0.78rem; letter-spacing:0.04em;
  border:1px solid var(--line-strong);
  padding:0.5em 0.9em;
  color:var(--ink-soft);
}
.badge b{ color:var(--paper); }
.badge-row{ display:flex; flex-wrap:wrap; gap:0.6rem; margin-top:1rem; }

/* utility */
.mt-0{ margin-top:0; }
.center{ text-align:center; }
.small{ font-size:0.85rem; }
.access-box{
  border:1px dashed var(--line-strong);
  padding:var(--space-2);
  text-align:center;
}