/* Historic Berlin Promenades — Instrument Sans / Serif, mobile-first */
:root{
  --anthracite:#202426;
  --rust:#A54B35;
  --concrete:#D7CCBC;
  --spree:#587873;
  --offwhite:#F5F2EA;
  --ink:#202426;
  --maxw:1080px;
  --sans:'Instrument Sans',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --serif:'Instrument Serif',Georgia,'Times New Roman',serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans);color:var(--ink);background:var(--offwhite);
  line-height:1.65;font-size:clamp(16px,1.1vw + 12px,18px);
  overflow-x:hidden;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--serif);line-height:1.1;font-weight:400;letter-spacing:0}
h1{font-size:clamp(2.2rem,7vw,4rem)}
h2{font-size:clamp(1.7rem,4.5vw,2.5rem);margin-bottom:.6rem;color:var(--anthracite)}
h3{font-size:clamp(1.2rem,2.6vw,1.4rem);margin-bottom:.35rem;color:var(--anthracite)}
p{margin-bottom:1rem}
a{color:var(--rust);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 clamp(16px,4vw,24px)}
section{padding:clamp(48px,8vw,76px) 0;border-bottom:1px solid rgba(32,36,38,.08)}
.eyebrow{font-size:.8rem;text-transform:uppercase;letter-spacing:.18em;color:var(--rust);font-weight:600;margin-bottom:.5rem}
.skip-link{position:absolute;left:-999px;top:0;background:var(--anthracite);color:#fff;padding:10px 16px;z-index:200}
.skip-link:focus{left:8px;top:8px}

/* NAV */
header.nav{position:sticky;top:0;z-index:50;background:rgba(245,242,234,.94);backdrop-filter:blur(8px);border-bottom:1px solid rgba(32,36,38,.1)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px clamp(16px,4vw,24px);max-width:var(--maxw);margin:0 auto}
.brand{font-family:var(--serif);font-weight:400;font-size:clamp(1.05rem,2.4vw,1.3rem);color:var(--anthracite);white-space:nowrap}
.brand a{color:inherit}
.brand span{color:var(--rust)}
.nav-right{display:flex;align-items:center;gap:14px}
.nav-links{display:flex;gap:16px}
.nav-links a{color:var(--anthracite);font-size:.9rem;font-weight:500}
.nav-links a:hover{color:var(--rust);text-decoration:none}
.langs{display:flex;gap:3px;flex-wrap:wrap}
.langs a{
  font-size:.7rem;font-weight:600;letter-spacing:.05em;text-transform:uppercase;
  border:1px solid rgba(32,36,38,.2);color:var(--anthracite);padding:4px 7px;border-radius:4px;transition:.15s
}
.langs a:hover{border-color:var(--rust);color:var(--rust);text-decoration:none}
.langs a.active{background:var(--anthracite);color:var(--offwhite);border-color:var(--anthracite)}

/* HERO */
.hero{
  position:relative;color:var(--offwhite);padding:clamp(72px,12vw,120px) 0 clamp(64px,10vw,110px);border-bottom:none;
  background:linear-gradient(180deg,rgba(32,36,38,.72),rgba(32,36,38,.84)),
    url("../images/grosser-bunkerberg.jpg");
  background-size:cover;background-position:center
}
.hero h1{color:#fff;max-width:18ch;margin-bottom:.4rem}
.hero .payoff{font-family:var(--serif);font-style:italic;font-size:clamp(1.15rem,3vw,1.6rem);color:var(--concrete);margin-bottom:1.3rem}
.hero .lede{max-width:54ch;font-size:clamp(1rem,1.6vw,1.1rem);color:#efeadd}
.cta-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}
.btn{
  display:inline-block;font-weight:600;font-size:.95rem;padding:13px 22px;border-radius:6px;cursor:pointer;
  border:1px solid transparent;transition:.15s;font-family:var(--sans);min-height:46px;text-align:center
}
.btn-primary{background:var(--rust);color:#fff}
.btn-primary:hover{background:#8f3f2c;text-decoration:none}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-ghost:hover{border-color:#fff;text-decoration:none}

/* INTRO */
.intro p{font-size:clamp(1.05rem,1.8vw,1.15rem);max-width:60ch}
.pill{display:inline-block;background:var(--concrete);color:var(--anthracite);padding:4px 12px;border-radius:999px;font-size:.8rem;font-weight:600;margin-bottom:1rem}

/* TEASER */
.teaser{padding:0;border-bottom:none;position:relative}
.teaser figure{margin:0;position:relative}
.teaser img{width:100%;height:min(56vh,520px);object-fit:cover}
.teaser figcaption{position:absolute;left:0;right:0;bottom:0;padding:40px 0 20px;background:linear-gradient(180deg,rgba(32,36,38,0),rgba(32,36,38,.86));color:var(--offwhite)}
.teaser .tlabel{font-family:var(--serif);font-style:italic;font-size:clamp(1.05rem,2.6vw,1.6rem);color:#fff;margin:0;max-width:36ch}
.credit{font-size:.72rem;opacity:.8;margin:6px 0 0}
.credit a{color:inherit;text-decoration:underline}

/* STOPS */
.stops{background:var(--anthracite);color:var(--offwhite)}
.stops h2{color:#fff}.stops .eyebrow{color:var(--concrete)}
.stop-grid{display:grid;grid-template-columns:1fr;gap:2px;margin-top:28px;border-radius:10px;overflow:hidden}
.stop{display:grid;grid-template-columns:56px 1fr;gap:18px;padding:24px;background:rgba(245,242,234,.04);border:1px solid rgba(245,242,234,.08)}
.stop .num{font-family:var(--serif);font-size:2rem;color:var(--rust);line-height:1}
.stop h3{color:#fff}.stop p{color:#d9d3c6;margin-bottom:.5rem}
.stop a{color:var(--concrete);font-size:.9rem;text-decoration:underline}
.stop figure{margin:14px 0 8px;border-radius:8px;overflow:hidden}
.stop figure img{width:100%;max-height:280px;object-fit:cover}
.stop figcaption{font-size:.72rem;color:#b7b0a3;padding-top:6px}
.stop figcaption a{color:#b7b0a3}
.arc{margin-top:26px;padding:18px 20px;background:rgba(165,75,53,.16);border-left:3px solid var(--rust);border-radius:0 8px 8px 0;font-family:var(--serif);font-size:clamp(1.05rem,2vw,1.2rem);color:#fff}

/* WHY */
.why-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin-top:24px}
.why-card{background:#fff;border:1px solid rgba(32,36,38,.1);border-radius:10px;padding:22px}
.why-card .dot{width:34px;height:34px;border-radius:8px;background:var(--spree);margin-bottom:12px}
.why-card:nth-child(2) .dot{background:var(--rust)}
.why-card:nth-child(3) .dot{background:var(--anthracite)}
.why-card:nth-child(4) .dot{background:var(--concrete)}

/* KOEN */
.koen{background:var(--spree);color:var(--offwhite)}
.koen h2{color:#fff}.koen .eyebrow{color:var(--concrete)}
.koen-inner{display:grid;grid-template-columns:140px 1fr;gap:26px;align-items:center}
.koen-photo{width:140px;height:140px;border-radius:14px;overflow:hidden;background:var(--anthracite);flex:none}
.koen-photo img{width:100%;height:100%;object-fit:cover;object-position:center top}
.koen p{color:#eef0ee;max-width:60ch}

/* PRACTICAL */
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px;margin-top:24px}
.fact{background:#fff;border:1px solid rgba(32,36,38,.1);border-radius:10px;padding:18px}
.fact .k{font-size:.75rem;text-transform:uppercase;letter-spacing:.12em;color:var(--rust);font-weight:600;margin-bottom:6px}
.fact .v{font-family:var(--serif);font-size:1.2rem;color:var(--anthracite)}

/* REVIEWS */
.reviews{background:var(--concrete)}
.note{background:rgba(165,75,53,.14);border:1px dashed var(--rust);color:#7a3625;padding:10px 14px;border-radius:8px;font-size:.85rem;font-weight:600;margin-bottom:20px}
.review-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.review{background:var(--offwhite);border-radius:10px;padding:22px}
.review blockquote{font-family:var(--serif);font-size:1.15rem;font-style:italic;color:var(--anthracite);margin-bottom:12px}
.review .who{font-size:.8rem;color:var(--rust);font-weight:600;text-transform:uppercase;letter-spacing:.08em}

/* CONTACT */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px;margin-top:24px}
form label{display:block;font-size:.85rem;font-weight:600;margin-bottom:5px;color:var(--anthracite)}
form input,form textarea{width:100%;padding:12px 13px;border:1px solid rgba(32,36,38,.25);border-radius:7px;font-family:inherit;font-size:1rem;margin-bottom:14px;background:#fff;color:var(--ink)}
form input:focus,form textarea:focus{outline:2px solid var(--spree);border-color:var(--spree)}
.contact-side .btn{margin-bottom:12px;display:block;width:100%}
.btn-wa{background:#25D366;color:#0a2e17}
.btn-mail{background:var(--anthracite);color:#fff}
.placeholder-mark{font-size:.8rem;color:#7a3625;font-weight:600}

/* FAQ / details */
details{background:#fff;border:1px solid rgba(32,36,38,.12);border-radius:8px;margin-bottom:10px;padding:0 18px}
summary{cursor:pointer;font-weight:600;padding:16px 0;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px;color:var(--anthracite)}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:1.4rem;color:var(--rust);flex:none}
details[open] summary::after{content:"\2013"}
details .a{padding:0 0 16px;margin:0;color:#39413f}

/* BLOG */
.blog-hero{background:var(--anthracite);color:var(--offwhite);padding:clamp(48px,8vw,80px) 0}
.blog-hero h1{color:#fff;max-width:20ch}
.blog-hero .eyebrow{color:var(--concrete)}
.blog-hero p{color:#d9d3c6;max-width:60ch}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:22px;margin-top:8px}
.card{background:#fff;border:1px solid rgba(32,36,38,.12);border-radius:12px;overflow:hidden;display:flex;flex-direction:column;transition:transform .15s,box-shadow .15s}
.card:hover{transform:translateY(-3px);box-shadow:0 10px 26px rgba(32,36,38,.12);text-decoration:none}
.card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.card .body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:8px;flex:1}
.card h3{color:var(--anthracite)}
.card p{color:#4a524f;font-size:.95rem;margin:0}
.card .meta{font-size:.75rem;color:var(--rust);font-weight:600;text-transform:uppercase;letter-spacing:.08em;margin-top:auto}

/* ARTICLE */
.article{padding:0 0 clamp(40px,7vw,72px)}
.article-hero{position:relative;background:var(--anthracite)}
.article-hero img{width:100%;height:min(48vh,440px);object-fit:cover;opacity:.85}
.article-head{background:var(--anthracite);color:var(--offwhite);padding:28px 0 34px}
.article-head h1{color:#fff;max-width:22ch;margin-bottom:10px}
.article-head .meta{font-size:.82rem;color:var(--concrete)}
.breadcrumb{font-size:.8rem;color:#b7b0a3;margin-bottom:14px}
.breadcrumb a{color:#b7b0a3}
.prose{max-width:70ch;margin:0 auto}
.prose h2{margin:34px 0 8px}
.prose p{font-size:clamp(1rem,1.7vw,1.12rem);color:#2b312f}
.prose .figcredit{font-size:.72rem;color:#7a756a;margin-top:-4px}
.toc{background:#fff;border:1px solid rgba(32,36,38,.12);border-radius:10px;padding:16px 20px;margin:22px auto;max-width:70ch}
.toc strong{display:block;font-size:.78rem;text-transform:uppercase;letter-spacing:.12em;color:var(--rust);margin-bottom:8px}
.toc ol{margin:0;padding-left:20px}.toc li{margin-bottom:4px}
.article-cta{background:var(--spree);color:#fff;border-radius:12px;padding:28px;margin:34px auto 0;max-width:70ch;text-align:center}
.article-cta h3{color:#fff}
.article-cta .btn-primary{margin-top:10px}
.related{max-width:70ch;margin:36px auto 0}

/* FOOTER */
footer{background:var(--anthracite);color:var(--concrete);padding:40px 0;text-align:center;font-size:.85rem}
footer .brand{color:#fff;display:inline-block;margin-bottom:8px}
footer a{color:var(--concrete)}
.foot-links{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin:10px 0}

/* MOBILE */
@media(max-width:760px){
  .nav-links{display:none}
  .contact-grid{grid-template-columns:1fr}
  .koen-inner{grid-template-columns:1fr}
  .koen-photo{width:110px;height:110px}
  .stop{grid-template-columns:1fr;gap:6px;padding:20px}
  .stop .num{font-size:1.6rem}
  .hero .cta-row .btn{flex:1 1 100%}
}
@media(max-width:420px){
  .langs a{padding:4px 6px;font-size:.66rem}
  .brand{font-size:1rem}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto;transition:none!important}}