/* ============================================================
   Palais Horst — 2026 theme (Phase I: home)
   Self-contained. Auto light/dark. Cormorant Garamond + Archivo.
   Four-pigment apartment system: Yellow/Green/Red/Blue.
   ============================================================ */

:root{
  --plaster:#E8E6DF;
  --plaster-2:#DEDBD1;
  --paper:#F3F1EA;
  --ink:#1B1A16;
  --ink-2:#3A382F;
  --muted:#6C685B;
  --line:#CBC7BA;
  --y:#C0912F;  /* Yellow — ochre  */
  --g:#3C6A50;  /* Green  — bottle */
  --r:#9C3A33;  /* Red    — oxblood*/
  --b:#2E5470;  /* Blue   — prussian */
  --accent:var(--r);
  --bg:var(--plaster);
  --surface:var(--paper);
  --fg:var(--ink);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --plaster:#17150F; --plaster-2:#211E17; --paper:#201D16;
    --ink:#ECE8DC; --ink-2:#C9C4B4; --muted:#9A9484; --line:#39352B;
    --y:#D9AE52; --g:#5C9573; --r:#C86258; --b:#5E93B6;
    --bg:var(--plaster); --surface:var(--paper); --fg:var(--ink);
  }
}
:root[data-theme="dark"]{
  --plaster:#17150F; --plaster-2:#211E17; --paper:#201D16;
  --ink:#ECE8DC; --ink-2:#C9C4B4; --muted:#9A9484; --line:#39352B;
  --y:#D9AE52; --g:#5C9573; --r:#C86258; --b:#5E93B6;
  --bg:var(--plaster); --surface:var(--paper); --fg:var(--ink);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--fg);
  font-family:"Archivo",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  line-height:1.65;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}
.serif{font-family:"Cormorant Garamond",Georgia,serif}
.wrap{max-width:1160px;margin:0 auto;padding:0 28px}
.eyebrow{font-size:12px;font-weight:600;letter-spacing:.24em;text-transform:uppercase;color:var(--muted);margin:0}
h1,h2,h3{font-family:"Cormorant Garamond",Georgia,serif;font-weight:500;text-wrap:balance;margin:0;letter-spacing:-.01em}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

/* ————— top navigation (over hero) ————— */
.site-nav{
  position:absolute;top:0;left:0;right:0;z-index:20;
  display:flex;align-items:center;justify-content:space-between;
  padding:22px clamp(20px,4vw,48px);color:#F3F1EA;
}
.site-nav .brand{display:flex;align-items:center;gap:13px;text-decoration:none;color:#F3F1EA}
.site-nav .brand img{width:36px;height:auto;filter:brightness(0) invert(1)}
.site-nav .brand .nm{font-family:"Cormorant Garamond",serif;font-size:23px;font-weight:600;line-height:1;letter-spacing:.02em}
.site-nav .brand .sub{font-size:10px;letter-spacing:.22em;text-transform:uppercase;opacity:.82;margin-top:3px}
.nav-links{display:flex;align-items:center;gap:30px;list-style:none;margin:0;padding:0}
.nav-links a{font-size:12px;letter-spacing:.18em;text-transform:uppercase;text-decoration:none;color:#F3F1EA;opacity:.9;padding:6px 0;position:relative}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:#F3F1EA;transition:width .3s ease}
.nav-links a:hover{opacity:1}
.nav-links a:hover::after{width:100%}
.nav-toggle{display:none;background:none;border:1px solid rgba(243,241,234,.5);color:#F3F1EA;
  font-size:11px;letter-spacing:.18em;text-transform:uppercase;padding:9px 14px;border-radius:2px;cursor:pointer}

/* ————— hero ————— */
.hero{position:relative;min-height:100svh;min-height:100vh;display:flex;flex-direction:column;justify-content:flex-end;overflow:hidden;background:#1b1a16;padding-top:clamp(84px,11vh,120px)}
.hero__media{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.hero::after{content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(180deg,rgba(20,18,14,.55) 0%,rgba(20,18,14,.15) 34%,rgba(20,18,14,.72) 100%)}
.hero__inner{position:relative;z-index:5;padding:0 clamp(20px,4vw,48px) clamp(30px,5vw,54px);max-width:1160px;margin:0 auto;width:100%}
.hero__ek{color:rgba(243,241,234,.9);margin-bottom:20px}
.hero h1{color:#F6F4EE;font-weight:400;font-size:clamp(44px,7.5vw,104px);line-height:.96}
.hero h1 em{font-style:italic;color:#E7B45E}
.hero__lede{color:rgba(243,241,234,.92);font-family:"Cormorant Garamond",serif;font-size:clamp(18px,2.2vw,24px);
  line-height:1.4;max-width:46ch;margin-top:22px}

/* four-room selector strip */
.rooms{position:relative;z-index:5;display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid rgba(243,241,234,.18)}
.room{position:relative;display:flex;flex-direction:column;justify-content:flex-end;gap:4px;
  min-height:128px;padding:22px clamp(16px,2vw,26px);text-decoration:none;color:#F3F1EA;
  transition:background .35s ease, transform .35s ease}
.room::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--c)}
.room+.room{border-left:1px solid rgba(243,241,234,.18)}
.room .lbl{font-size:11px;letter-spacing:.2em;text-transform:uppercase;opacity:.72}
.room .nm{font-family:"Cormorant Garamond",serif;font-size:clamp(24px,3vw,34px);font-weight:600;line-height:1}
.room .meta{font-size:12px;letter-spacing:.05em;opacity:.78;margin-top:2px}
.room:hover,.room:focus-visible{background:var(--c);transform:translateY(-4px)}
.room:hover .lbl,.room:hover .meta{opacity:.95}
.room.y{--c:var(--y)} .room.g{--c:var(--g)} .room.r{--c:var(--r)} .room.b{--c:var(--b)}

/* ————— content bands ————— */
.band{padding:clamp(56px,9vw,110px) 0;border-bottom:1px solid var(--line)}
.band--paper{background:var(--surface)}
.lead-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,6vw,72px);align-items:center}
.lead-grid .eyebrow{margin-bottom:18px}
.lead-grid h2{font-size:clamp(32px,4.6vw,54px);font-weight:500;line-height:1.02}
.lead-grid h2 em{font-style:italic;color:var(--accent)}
.lead-grid .copy p{color:var(--ink-2);font-size:17px;margin:18px 0 0;max-width:52ch}
.facts{list-style:none;margin:26px 0 0;padding:0;display:flex;flex-direction:column;gap:0}
.facts li{display:flex;justify-content:space-between;gap:20px;padding:15px 0;border-top:1px solid var(--line);font-size:15px}
.facts li:last-child{border-bottom:1px solid var(--line)}
.facts .k{color:var(--muted);letter-spacing:.04em}
.facts .v{font-family:"Cormorant Garamond",serif;font-size:21px;font-weight:600;font-variant-numeric:tabular-nums}
.lead-grid .figure{aspect-ratio:4/5;border-radius:3px;overflow:hidden;background:var(--plaster-2)}
.lead-grid .figure img{width:100%;height:100%;object-fit:cover;filter:grayscale(.15)}

/* concert / salon teaser */
.salon{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(30px,6vw,72px);align-items:center}
.salon .eyebrow{margin-bottom:18px}
.salon h2{font-size:clamp(30px,4.4vw,50px);font-weight:500;line-height:1.03}
.salon p{color:var(--ink-2);font-size:17px;margin:18px 0 0;max-width:50ch}
.programme{list-style:none;margin:26px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:9px}
.programme a{display:inline-block;font-size:13px;letter-spacing:.02em;text-decoration:none;color:var(--ink-2);
  border:1px solid var(--line);border-radius:100px;padding:7px 15px;transition:.25s}
.programme a:hover{border-color:var(--accent);color:var(--accent)}
.btn{display:inline-flex;align-items:center;gap:10px;margin-top:28px;text-decoration:none;
  font-size:12px;letter-spacing:.18em;text-transform:uppercase;font-weight:600;
  color:var(--fg);border-bottom:2px solid var(--accent);padding:6px 0}
.btn .ar{color:var(--accent);transition:transform .25s}
.btn:hover .ar{transform:translateX(5px)}
.salon .poster{aspect-ratio:1/1;border-radius:3px;overflow:hidden;background:var(--ink);position:relative}
.salon .poster img{width:100%;height:100%;object-fit:cover;opacity:.9}
.salon .poster figcaption{position:absolute;left:0;right:0;bottom:0;padding:16px 18px;color:#F3F1EA;
  font-family:"Cormorant Garamond",serif;font-size:19px;
  background:linear-gradient(0deg,rgba(20,18,14,.82),transparent)}

/* ————— footer ————— */
.site-foot{background:var(--plaster-2);padding:clamp(46px,7vw,80px) 0 40px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px}
.foot-brand .nm{font-family:"Cormorant Garamond",serif;font-size:28px;font-weight:600;line-height:1}
.foot-brand .sub{font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--muted);margin-top:6px}
.foot-col h4{font-family:"Archivo";font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);font-weight:600;margin:0 0 14px}
.foot-col a,.foot-col p{color:var(--ink-2);text-decoration:none;font-size:15px;margin:0 0 8px;line-height:1.5;display:block}
.foot-col a:hover{color:var(--accent)}
.foot-bottom{margin-top:clamp(40px,6vw,64px);padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12px;color:var(--muted);letter-spacing:.03em}

/* ————— responsive ————— */
@media (max-width:860px){
  .nav-links{position:fixed;inset:0;z-index:30;flex-direction:column;justify-content:center;gap:30px;
    background:rgba(20,18,14,.97);transform:translateX(100%);transition:transform .35s ease}
  .nav-links.open{transform:translateX(0)}
  .nav-links a{font-size:15px}
  .nav-toggle{display:inline-block;position:relative;z-index:40}
  .lead-grid,.salon,.foot-grid{grid-template-columns:1fr}
  .lead-grid .figure{aspect-ratio:16/10;order:-1}
  .rooms{grid-template-columns:repeat(2,1fr)}
  .room:nth-child(2){border-left:none}
  .room:nth-child(3),.room:nth-child(4){border-top:1px solid rgba(243,241,234,.18)}
  .foot-bottom{flex-direction:column}
}
@media (max-width:460px){
  .rooms{grid-template-columns:1fr}
  .room{min-height:96px;flex-direction:row;align-items:baseline;justify-content:space-between}
  .room .nm{font-size:26px}
  .room .lbl{display:none}
  .room+.room{border-left:none;border-top:1px solid rgba(243,241,234,.18)}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{animation:none!important;transition:none!important}
}

/* ============================================================
   Phase II — Accommodation overview + room pages
   ============================================================ */

/* slim inner-page top bar (solid, theme-aware) */
.topbar{position:sticky;top:0;z-index:30;background:var(--bg);border-bottom:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;padding:16px clamp(20px,4vw,48px)}
.topbar .brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--fg)}
.topbar .brand img{width:30px;height:auto}
.topbar .brand .nm{font-family:"Cormorant Garamond",serif;font-size:21px;font-weight:600;line-height:1;letter-spacing:.02em}
.topbar .brand .sub{font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);margin-top:2px}
.topbar .nav-links{display:flex;align-items:center;gap:28px;list-style:none;margin:0;padding:0}
.topbar .nav-links a{font-size:12px;letter-spacing:.18em;text-transform:uppercase;text-decoration:none;color:var(--fg);opacity:.82;padding:6px 0;position:relative}
.topbar .nav-links a[aria-current="page"]{opacity:1;color:var(--accent)}
.topbar .nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--accent);transition:width .3s}
.topbar .nav-links a:hover{opacity:1}
.topbar .nav-links a:hover::after{width:100%}
.topbar .nav-toggle{display:none;background:none;border:1px solid var(--line);color:var(--fg);
  font-size:11px;letter-spacing:.16em;text-transform:uppercase;padding:9px 13px;border-radius:2px;cursor:pointer}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .topbar .brand img{filter:brightness(0) invert(1)}}
:root[data-theme="dark"] .topbar .brand img{filter:brightness(0) invert(1)}

.page-wrap{max-width:1160px;margin:0 auto;padding:clamp(40px,7vw,84px) clamp(20px,4vw,48px) 0}
.page-head{margin-bottom:clamp(30px,5vw,52px)}
.page-head .eyebrow{margin-bottom:14px}
.page-head h1{font-size:clamp(40px,7vw,76px);font-weight:400;line-height:.98}
.backlink{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);text-decoration:none;margin-bottom:22px}
.backlink:hover{color:var(--accent)}
.backlink .ar{transition:transform .25s}
.backlink:hover .ar{transform:translateX(-4px)}

/* accommodation overview — four apartment cards */
.apt-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(16px,2.4vw,26px);padding-bottom:clamp(56px,9vw,110px)}
.apt-card{position:relative;display:block;text-decoration:none;color:#F3F1EA;border-radius:3px;overflow:hidden;
  aspect-ratio:3/2;background:var(--ink)}
.apt-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s ease;filter:grayscale(.12)}
.apt-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,18,14,.05) 40%,rgba(20,18,14,.78) 100%)}
.apt-card .tag{position:absolute;left:0;top:0;width:6px;height:100%;background:var(--c);z-index:2}
.apt-card .cap{position:absolute;left:0;right:0;bottom:0;z-index:3;padding:22px 24px;display:flex;align-items:flex-end;justify-content:space-between;gap:12px}
.apt-card .cap .nm{font-family:"Cormorant Garamond",serif;font-size:clamp(26px,3.4vw,40px);font-weight:600;line-height:1}
.apt-card .cap .meta{font-size:13px;letter-spacing:.06em;opacity:.9}
.apt-card:hover img{transform:scale(1.04)}
.apt-card.y{--c:var(--y)} .apt-card.g{--c:var(--g)} .apt-card.r{--c:var(--r)} .apt-card.b{--c:var(--b)}

/* room page */
.room-head{--c:var(--accent);display:grid;grid-template-columns:1fr auto;gap:30px;align-items:end;
  padding-bottom:clamp(26px,4vw,40px);border-bottom:3px solid var(--c);margin-bottom:clamp(30px,5vw,52px)}
.room-yellow .room-head{--c:var(--y)} .room-green .room-head{--c:var(--g)}
.room-red .room-head{--c:var(--r)} .room-blue .room-head{--c:var(--b)}
.room-head .eyebrow{margin-bottom:12px}
.room-head h1{font-size:clamp(48px,9vw,104px);font-weight:400;line-height:.9;color:var(--c)}
.room-head .size{font-family:"Cormorant Garamond",serif;font-size:clamp(22px,3vw,30px);font-weight:600;color:var(--ink-2);margin-top:6px}
.room-head .room-content p{margin:0}
.doclinks{display:flex;flex-direction:column;gap:10px;text-align:right}
.doclinks a{display:inline-flex;align-items:center;justify-content:flex-end;gap:9px;text-decoration:none;
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--fg);white-space:nowrap}
.doclinks a .ic{font-size:11px;color:var(--c);border:1px solid var(--line);border-radius:2px;padding:3px 6px}
.doclinks a:hover{color:var(--c)}

.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(10px,1.4vw,16px);padding-bottom:clamp(56px,9vw,110px)}
.shot{display:block;aspect-ratio:3/2;overflow:hidden;border-radius:2px;background:var(--plaster-2);cursor:zoom-in;border:0;padding:0}
.shot img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.shot:hover img{transform:scale(1.05)}
.gallery .shot:first-child{grid-column:span 2;grid-row:span 2}

/* lightbox */
.lightbox{position:fixed;inset:0;z-index:100;background:rgba(15,13,10,.94);display:none;align-items:center;justify-content:center;padding:24px}
.lightbox.open{display:flex}
.lightbox img{max-width:94vw;max-height:88vh;object-fit:contain;border-radius:2px}
.lightbox .lb-close{position:absolute;top:18px;right:24px;background:none;border:0;color:#F3F1EA;font-size:34px;line-height:1;cursor:pointer;opacity:.85}
.lightbox .lb-nav{position:absolute;top:50%;transform:translateY(-50%);background:none;border:0;color:#F3F1EA;font-size:44px;cursor:pointer;opacity:.7;padding:20px}
.lightbox .lb-nav:hover,.lightbox .lb-close:hover{opacity:1}
.lightbox .lb-prev{left:8px} .lightbox .lb-next{right:8px}

@media (max-width:860px){
  .topbar .nav-links{position:fixed;inset:0;z-index:40;flex-direction:column;justify-content:center;gap:28px;
    background:var(--bg);transform:translateX(100%);transition:transform .35s ease}
  .topbar .nav-links.open{transform:translateX(0)}
  .topbar .nav-links a{font-size:15px}
  .topbar .nav-toggle{display:inline-block;position:relative;z-index:50}
  .room-head{grid-template-columns:1fr;align-items:start}
  .doclinks{flex-direction:row;flex-wrap:wrap;text-align:left}
  .doclinks a{justify-content:flex-start}
}
@media (max-width:560px){
  .apt-grid{grid-template-columns:1fr}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .gallery .shot:first-child{grid-column:span 2;grid-row:auto}
}

/* ============================================================
   Phase III — Concerts / Philharmonie Horst salon
   ============================================================ */
.feature{margin:0 0 clamp(40px,6vw,64px);border-radius:3px;overflow:hidden;background:var(--ink);position:relative}
.feature video{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;background:#000}
.feature figcaption{padding:14px 20px;color:var(--muted);font-size:13px;letter-spacing:.06em;
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;background:var(--surface)}
.feature figcaption .t{font-family:"Cormorant Garamond",serif;font-size:18px;color:var(--fg);font-weight:600}

.conc-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin-bottom:clamp(20px,3vw,30px)}
.conc-head h2{font-size:clamp(24px,3.4vw,36px);font-weight:500}
.conc-list{display:grid;grid-template-columns:repeat(2,1fr);gap:0 clamp(28px,4vw,56px);
  padding-bottom:clamp(56px,9vw,110px)}
.conc{display:flex;align-items:baseline;justify-content:space-between;gap:16px;text-decoration:none;
  color:var(--fg);padding:17px 0;border-top:1px solid var(--line);transition:.25s}
.conc:hover{color:var(--accent)}
.conc .txt .cm{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);display:block;margin-bottom:3px}
.conc:hover .txt .cm{color:var(--accent)}
.conc .txt .ti{font-family:"Cormorant Garamond",serif;font-size:21px;font-weight:600;line-height:1.15}
.conc .yt{flex:none;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);white-space:nowrap;align-self:center}
@media (max-width:680px){ .conc-list{grid-template-columns:1fr} }