@font-face{font-family:"Atkinson Hyperlegible";src:url(fonts/atkinson-400.woff2) format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Atkinson Hyperlegible";src:url(fonts/atkinson-700.woff2) format("woff2");font-weight:700;font-style:normal;font-display:swap}

/* Palette from a paper nautical chart: deep water white, shallow water blue, land buff, chart ink, magenta notes */
:root{
  --deep:#ffffff;
  --shallow:#d4e9f4;
  --shallow-line:#8dbbd6;
  --land:#f0e2b0;
  --ink:#17304a;
  --ink-soft:#4a5d70;
  --magenta:#a0197a;
  --red:#c62828;--amber:#e0a400;--grey:#7b8794;--green:#2e7d32;
  --gutter:clamp(16px,4vw,48px);
  --max:1160px;
  --font:"Atkinson Hyperlegible",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--deep);color:var(--ink);font:400 1.0625rem/1.6 var(--font)}
img{max-width:100%;height:auto;display:block}
a{color:var(--ink);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--magenta);outline-offset:3px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:var(--gutter);top:8px;background:var(--deep);padding:8px 12px;z-index:5}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}

/* Header */
.top{border-bottom:1px solid var(--shallow-line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;flex-wrap:wrap}
.brand{font-weight:700;font-size:1.125rem;text-decoration:none;display:flex;align-items:baseline;gap:8px}
.brand span{font-weight:400;font-size:.875rem;color:var(--ink-soft)}
.top nav{display:flex;gap:20px;font-size:.9375rem}
.top nav a{text-decoration:none;padding:8px 0}
.top nav a:hover,.top nav a[aria-current]{text-decoration:underline}

/* Hero inside a chart border with graduated scale */
.chart{position:relative;margin:clamp(28px,4vw,44px) 0 0;padding:7px}
.chart::before{content:"";position:absolute;inset:0;border:1.5px solid var(--ink);
  background:
    repeating-linear-gradient(90deg,var(--ink) 0 24px,var(--deep) 24px 48px) top/100% 7px no-repeat,
    repeating-linear-gradient(90deg,var(--ink) 0 24px,var(--deep) 24px 48px) bottom/100% 7px no-repeat,
    repeating-linear-gradient(180deg,var(--ink) 0 24px,var(--deep) 24px 48px) left/7px 100% no-repeat,
    repeating-linear-gradient(180deg,var(--ink) 0 24px,var(--deep) 24px 48px) right/7px 100% no-repeat;
  pointer-events:none}
.chart-inner{position:relative;border:1px solid var(--ink);overflow:hidden;background:var(--deep)}
.deg{position:absolute;font-size:.75rem;color:var(--ink-soft);background:var(--deep);padding:0 6px;line-height:1}
.deg.n{top:-18px;left:0}.deg.e{top:-18px;right:0}
.deg.s{bottom:-18px;left:0}
.deg{background:none;padding:0}
.hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);gap:clamp(24px,5vw,64px);align-items:end;padding:clamp(28px,5vw,64px) clamp(20px,4vw,56px) 0;position:relative}
.depth{position:absolute;inset:auto 0 0 0;height:58%;pointer-events:none}
.hero-text{position:relative;padding-bottom:clamp(28px,5vw,56px)}
.hero h1{font-size:clamp(2.1rem,5.2vw,3.9rem);line-height:1.04;letter-spacing:-.02em;margin:0 0 20px;max-width:15ch}
.hero p.sub{font-size:clamp(1.05rem,1.6vw,1.2rem);max-width:46ch;margin:0 0 28px}
.actions{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;min-height:48px;padding:10px 20px;border:2px solid var(--ink);border-radius:6px;font-weight:700;text-decoration:none;background:var(--deep)}
.btn.primary{background:var(--ink);color:var(--deep)}
.btn.primary:hover{background:#0f2236}
.btn:hover{text-decoration:none;box-shadow:inset 0 -3px 0 var(--shallow-line)}
.caution{margin:28px 0 0;max-width:46ch;color:var(--magenta);font-size:.9375rem;border-left:3px solid var(--magenta);padding:2px 0 2px 12px}
.caution b{font-weight:700}
.phone{position:relative;align-self:end;justify-self:center;width:min(300px,100%);border:6px solid var(--ink);border-bottom:0;border-radius:28px 28px 0 0;overflow:hidden;background:var(--ink)}
.phone img{width:100%;aspect-ratio:390/700;object-fit:cover;object-position:top}

/* Sections */
section{padding:clamp(56px,8vw,96px) 0}
h2{font-size:clamp(1.75rem,3.4vw,2.5rem);line-height:1.12;letter-spacing:-.015em;margin:0 0 16px}
h3{font-size:1.25rem;line-height:1.25;margin:0}
.intro{max-width:60ch;color:var(--ink-soft);margin:0 0 40px}

/* App list as rows, separated like depth contours */
.apps{list-style:none;margin:0;padding:0;border-top:2px solid var(--ink)}
.app{display:grid;grid-template-columns:56px minmax(0,1fr) minmax(220px,auto);gap:12px 24px;padding:28px 0;border-bottom:1px solid var(--shallow-line);align-items:start}
.app img{width:56px;height:56px;border-radius:12px}
.app h3 a{text-decoration:none}
.app h3 a:hover{text-decoration:underline}
.app .area{color:var(--ink-soft);font-size:.9375rem;margin:4px 0 10px}
.app p{margin:0;max-width:62ch}
.app .side{display:flex;flex-direction:column;gap:8px;align-items:flex-start;font-size:.9375rem}
.app .ver{color:var(--ink-soft);font-size:.875rem}

/* Ampel legend */
.ampel{background:var(--shallow)}
.ampel-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(32px,6vw,80px);align-items:start}
.legend{margin:0;padding:0;list-style:none;background:var(--deep);border:1px solid var(--ink)}
.legend li{display:grid;grid-template-columns:28px 1fr;gap:14px;padding:16px 20px;border-bottom:1px solid var(--shallow-line)}
.legend li:last-child{border-bottom:0}
.dot{width:22px;height:22px;border-radius:50%;margin-top:2px;border:2px solid var(--ink)}
.dot.r{background:var(--red)}.dot.y{background:var(--amber)}.dot.g{background:var(--grey)}.dot.gr{background:var(--green)}
.legend b{display:block}
.legend span{color:var(--ink-soft);font-size:.9375rem}

/* Install */
.install-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,6vw,80px)}
.install-grid ol{padding-left:1.4em;margin:12px 0 0}
.install-grid li{margin:6px 0}
.note{font-size:.9375rem;color:var(--ink-soft);margin-top:16px;max-width:52ch}
.land{background:var(--land)}

/* FAQ */
.faq{max-width:760px}
.faq details{border-top:1px solid var(--shallow-line)}
.faq details:last-child{border-bottom:1px solid var(--shallow-line)}
.faq summary{cursor:pointer;padding:18px 0;font-weight:700;list-style-position:inside}
.faq details p{margin:0 0 20px;max-width:62ch}

/* App detail page */
.detail .hero h1{max-width:18ch}
.ident{display:flex;align-items:center;gap:14px;margin-bottom:20px;color:var(--ink-soft)}
.ident img{width:56px;height:56px;border-radius:12px}
.groups{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:40px clamp(32px,6vw,72px)}
.groups p{margin:8px 0 12px;max-width:58ch}
.groups ul{margin:0;padding-left:1.2em}
.groups li{margin:4px 0}
.limits{border-left:3px solid var(--magenta);padding-left:16px;max-width:66ch}
.limits h2{color:var(--magenta)}

/* Legal pages */
.legal{max-width:720px;padding:clamp(32px,6vw,64px) 0}
.legal h1{font-size:clamp(1.9rem,4vw,2.6rem);margin:0 0 24px}
.legal h2{font-size:1.3rem;margin:32px 0 8px}

/* Footer */
/* Same layout as the charterakte.de footer */
footer{border-top:1px solid var(--shallow-line);padding:28px 0;font-size:.875rem;color:var(--ink-soft)}
footer .wrap{display:flex;align-items:center;gap:16px 28px;flex-wrap:wrap}
footer .logo{display:block;line-height:0}
footer img{height:40px;width:auto}
footer p{margin:0}
footer nav{margin-left:auto;display:flex;gap:18px}
footer a{color:var(--ink-soft)}

@media (max-width:820px){
  .hero{grid-template-columns:1fr}
  .phone{width:min(260px,80%)}
  .app{grid-template-columns:48px minmax(0,1fr)}
  .app img{width:48px;height:48px}
  .app .side{grid-column:2;flex-direction:row;flex-wrap:wrap;align-items:center;gap:8px 16px}
  .ampel-grid,.install-grid,.groups{grid-template-columns:1fr}
}
@media (max-width:480px){
  .chart{padding:14px}
  .deg{display:none}
  .top nav{gap:16px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}