/* AirTown BER GmbH — editorial business site */
:root {
  --bg: #f1ede4;
  --bg-2: #e7e1d3;
  --ink: #1a1a18;
  --muted: #5f5d56;
  --line: #d3ccbc;
  --accent: #2f5b45;
  --accent-lt: #9cc2a8;
  --dark: #1d211e;
  --error: #9a2f1f;
  --display: "Bricolage Grotesque", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --text: "Newsreader", Georgia, "Times New Roman", serif;
  --s1: .5rem; --s2: 1rem; --s3: 1.5rem; --s4: 2.5rem; --s5: 4.5rem; --s6: 7.5rem;
  --max: 1240px;
  --ease: cubic-bezier(.2, .6, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
body { background: var(--bg); color: var(--ink); font: 400 1.1875rem/1.6 var(--text); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
svg, img { display: block; max-width: 100%; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.wrap { width: min(100% - 2.5rem, var(--max)); margin-inline: auto; }
.section { padding-block: var(--s6); }

h1, h2, h3 { font-family: var(--display); font-weight: 600; line-height: 1.04; letter-spacing: -.03em; }
h1 { font-size: clamp(2.5rem, 5.6vw, 5rem); }
h2 { font-size: clamp(2rem, 4.2vw, 3.5rem); max-width: 18ch; }
h3 { font-size: 1.3rem; letter-spacing: -.015em; line-height: 1.2; }

/* Buttons and links */
.btn { display: inline-block; font: 500 1rem/1 var(--display); text-decoration: none; background: var(--ink); color: var(--bg); padding: 1.05rem 1.7rem; border: 1px solid var(--ink); border-radius: 2px; cursor: pointer; transition: background .25s var(--ease), border-color .25s var(--ease), transform .25s var(--ease); }
.btn:hover { background: var(--accent); border-color: var(--accent); transform: translateY(-2px); }
.btn-sm { font-size: .9rem; padding: .7rem 1.1rem; }
.link { font: 500 1rem var(--display); text-decoration: underline; text-decoration-color: var(--line); text-underline-offset: .35em; text-decoration-thickness: 2px; transition: text-decoration-color .25s; }
.link:hover { text-decoration-color: var(--accent); }

/* Header */
.site-header { position: fixed; inset: 0 0 auto; z-index: 50; padding-block: 1.4rem; transition: padding .3s var(--ease), background .3s, border-color .3s; border-bottom: 1px solid transparent; }
.site-header.scrolled { padding-block: .65rem; background: rgba(241, 237, 228, .96); border-color: var(--line); }
.bar { display: flex; align-items: center; justify-content: space-between; }
.logo { display: inline-flex; align-items: center; gap: .6rem; font: 500 1.15rem var(--display); letter-spacing: -.02em; text-decoration: none; }
.logo b { font-weight: 600; color: var(--accent); }
.logo-mark { width: 1.1rem; height: .9rem; background: linear-gradient(var(--ink) 0 0) center / 100% 3px no-repeat, var(--accent); }
.nav { display: flex; align-items: center; gap: 2rem; }
.nav a:not(.btn) { font: 500 .95rem var(--display); text-decoration: none; background: linear-gradient(var(--accent) 0 0) 0 100% / 0 2px no-repeat; padding-bottom: .2rem; transition: background-size .3s var(--ease); }
.nav a:not(.btn):hover { background-size: 100% 2px; }
.burger { display: none; width: 2.5rem; height: 2.5rem; background: none; border: 0; cursor: pointer; position: relative; }
.burger span { position: absolute; left: .5rem; right: .5rem; height: 2px; background: var(--ink); transition: transform .3s var(--ease), top .3s var(--ease); }
.burger span:first-child { top: 1rem; }
.burger span:last-child { top: 1.5rem; }
.burger[aria-expanded="true"] span:first-child { top: 1.25rem; transform: rotate(45deg); }
.burger[aria-expanded="true"] span:last-child { top: 1.25rem; transform: rotate(-45deg); }

/* Hero */
.hero { padding-top: 9.5rem; overflow-x: clip; }
.hero-grid { display: grid; grid-template-columns: 7fr 5fr; gap: var(--s5); align-items: end; }
.tag { display: inline-block; font: 500 .95rem var(--display); color: var(--accent); border-left: 3px solid var(--accent); padding-left: .75rem; margin-bottom: var(--s3); }
.lead { max-width: 34em; margin-top: var(--s3); font-size: 1.3rem; color: var(--muted); }
.cta-row { display: flex; align-items: center; flex-wrap: wrap; gap: var(--s3) var(--s4); margin-top: var(--s4); }
.hero-art { position: relative; aspect-ratio: 4 / 5; margin-bottom: 3rem; }
.hero-art > svg { width: 100%; height: 100%; }
.hero-card { position: absolute; left: -4.5rem; bottom: -3rem; width: 56%; background: var(--bg); padding: .6rem; border: 1px solid var(--line); }
.hero-card figcaption { font: 400 .85rem var(--display); color: var(--muted); margin-top: .5rem; }
.vlabel { position: absolute; top: 0; right: -1.6rem; writing-mode: vertical-rl; font: 400 .85rem var(--display); color: var(--muted); }
.facts { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--ink); margin-top: var(--s5); }
.facts div { padding: 1.1rem 1rem 0 0; }
.facts dt { font: 400 .9rem var(--display); color: var(--muted); }
.facts dd { font: 500 1.35rem var(--display); letter-spacing: -.02em; }

/* About */
.about-grid { display: grid; grid-template-columns: 5fr 6fr; column-gap: var(--s5); row-gap: var(--s4); grid-template-areas: "title title" "art text" "art facts"; }
.about-grid h2 { grid-area: title; max-width: 20ch; }
.about-art { grid-area: art; position: relative; isolation: isolate; aspect-ratio: 3 / 4; margin-top: 1rem; }
.about-art::before { content: ""; position: absolute; inset: 1.5rem -1.5rem -1.5rem 1.5rem; background: var(--accent); z-index: -1; }
.about-art svg { width: 100%; height: 100%; }
.about-text { grid-area: text; max-width: 36em; }
.about-text p + p { margin-top: 1.1rem; }
blockquote { margin-top: var(--s4); padding-left: 1.25rem; border-left: 3px solid var(--accent); font: 500 1.6rem/1.25 var(--display); letter-spacing: -.02em; }
.about-facts { grid-area: facts; list-style: none; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s3); border-top: 1px solid var(--line); padding-top: var(--s3); align-self: end; }
.about-facts strong { display: block; font: 600 1.5rem var(--display); letter-spacing: -.02em; color: var(--accent); }
.about-facts span { font-size: 1rem; color: var(--muted); line-height: 1.4; display: block; }

/* Services */
.services { background: var(--bg-2); }
.services-grid { display: grid; grid-template-columns: 4fr 7fr; gap: var(--s5); align-items: start; }
.services-intro { position: sticky; top: 6rem; }
.services-intro p { margin-top: var(--s3); color: var(--muted); max-width: 26em; }
.svc-list { list-style: none; padding: 0; border-top: 1px solid var(--ink); }
.svc { display: grid; grid-template-columns: 3rem 1fr 2.5rem; gap: 1.25rem; align-items: start; padding: 1.75rem 0; border-bottom: 1px solid var(--line); transition: padding .35s var(--ease); }
.svc:nth-child(even) { margin-left: 2.5rem; }
.svc:hover { padding-left: 1rem; }
.svc .num { font: 500 1rem var(--display); color: var(--muted); padding-top: .2rem; transition: color .3s; }
.svc p { margin-top: .4rem; color: var(--muted); font-size: 1.05rem; max-width: 30em; }
.ico { width: 2.5rem; height: 2.5rem; fill: none; stroke: var(--ink); stroke-width: 1.4; stroke-linecap: square; transition: stroke .3s, transform .35s var(--ease); }
.svc:hover .num { color: var(--accent); }
.svc:hover .ico { stroke: var(--accent); transform: translateX(-4px); }

/* Approach */
.approach { background: var(--dark); color: #ece6da; }
.approach h2 { max-width: 22ch; }
.ben-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: var(--s5); }
.ben { padding: 0 1.5rem 0 1.25rem; border-left: 1px solid rgba(236, 230, 218, .22); }
.ben:nth-child(even) { margin-top: 3.5rem; }
.ben .big { display: block; font: 600 6rem/1 var(--display); color: transparent; -webkit-text-stroke: 1px var(--accent-lt); margin-bottom: var(--s3); }
.ben p { margin-top: .7rem; font-size: 1.05rem; color: #b8b2a5; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 5fr 6fr; gap: var(--s5); align-items: start; }
address { font-style: normal; margin-top: var(--s4); font-size: 1.3rem; line-height: 1.5; }
.mail { display: inline-block; margin-top: var(--s2); font: 500 1.4rem var(--display); letter-spacing: -.02em; text-decoration: underline; text-decoration-thickness: 2px; text-decoration-color: var(--accent); text-underline-offset: .3em; transition: color .25s; }
.mail:hover { color: var(--accent); }
.note { margin-top: var(--s3); color: var(--muted); font-size: 1.05rem; max-width: 28em; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 var(--s3); }
.field { display: grid; gap: .3rem; margin-bottom: 1.1rem; align-content: start; }
label { font: 500 .9rem var(--display); }
input, textarea { width: 100%; font: 400 1.1rem var(--text); color: var(--ink); background: transparent; border: 0; border-bottom: 1px solid var(--ink); border-radius: 0; padding: .65rem 0; transition: border-color .25s, box-shadow .25s; }
textarea { resize: vertical; min-height: 7rem; }
input:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 1px 0 var(--accent); }
.field.invalid input, .field.invalid textarea { border-color: var(--error); box-shadow: 0 1px 0 var(--error); }
.err { color: var(--error); font: 400 .85rem var(--display); min-height: 1.2em; }
.status { margin-top: var(--s3); padding: .9rem 1rem; border-left: 3px solid; font: 400 .95rem/1.5 var(--display); }
.status.ok { border-color: var(--accent); background: #dfe8e0; }
.status.bad { border-color: var(--error); background: #f1ddd7; }

/* Footer */
.site-footer { background: var(--ink); color: #cfc9bc; padding-top: var(--s5); font-size: 1rem; }
.site-footer a { text-decoration: none; transition: color .2s; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1.2fr; gap: var(--s4); padding-bottom: var(--s4); }
.foot-logo { font: 600 1.4rem var(--display); color: #f1ede4; letter-spacing: -.02em; margin-bottom: .6rem; }
.foot-brand p:last-child { max-width: 26em; color: #a9a396; }
.site-footer h3 { font-size: .95rem; font-weight: 500; color: #a9a396; margin-bottom: .8rem; letter-spacing: 0; }
.site-footer nav { display: flex; flex-direction: column; gap: .35rem; }
.site-footer nav h3 { margin-bottom: .45rem; }
.site-footer p + p { margin-top: .6rem; }
.foot-bar { display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--s2); border-top: 1px solid rgba(236, 230, 218, .18); padding-block: 1.4rem; font-size: .9rem; color: #a9a396; }
.legal { display: flex; gap: 1.5rem; }

/* Reveal on scroll (applied only when JavaScript is available) */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }
.ben:nth-child(2) { transition-delay: .08s; } .ben:nth-child(3) { transition-delay: .16s; } .ben:nth-child(4) { transition-delay: .24s; }

/* Tablet */
@media (max-width: 980px) {
  .section { padding-block: var(--s5); }
  .hero-grid, .services-grid, .contact-grid { grid-template-columns: 1fr; gap: var(--s4); }
  .hero-art { max-width: 460px; margin-left: 4.5rem; }
  .about-grid { grid-template-columns: 1fr; grid-template-areas: "title" "art" "text" "facts"; }
  .about-art { max-width: 420px; margin-right: 1.5rem; }
  .services-intro { position: static; }
  .ben-grid { grid-template-columns: repeat(2, 1fr); row-gap: var(--s4); }
  .ben:nth-child(even) { margin-top: 0; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .foot-brand { grid-column: 1 / -1; }
}

/* Mobile */
@media (max-width: 860px) {
  .burger { display: block; }
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: flex-start; gap: 1.1rem; padding: 1.5rem 1.25rem 2rem; background: var(--bg); border-bottom: 1px solid var(--line); }
  .nav.open { display: flex; }
}
@media (max-width: 640px) {
  body { font-size: 1.125rem; }
  .hero { padding-top: 7.5rem; }
  .hero-art { margin-left: 1.5rem; margin-right: 0; }
  .hero-card { left: -1.5rem; width: 62%; }
  .vlabel { display: none; }
  .facts { grid-template-columns: 1fr; }
  .facts div { display: flex; justify-content: space-between; align-items: baseline; padding: .8rem 0; border-bottom: 1px solid var(--line); }
  .about-facts { grid-template-columns: 1fr; }
  .svc { grid-template-columns: 2.2rem 1fr; }
  .svc:nth-child(even) { margin-left: 0; }
  .svc .ico { display: none; }
  .ben-grid, .row { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
  .legal { flex-wrap: wrap; gap: .5rem 1.25rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}