/* =========================================================
   azero – styles.css
   Handgeschrieben, ohne Framework. Open Sans via fonts.css.
   Zwei Themes über CSS-Variablen: Dark (Standard) + Light.
   ========================================================= */

:root{
  /* Konstante Markenfarben */
  --green:#5aa9e0;
  --purple:#1c5f97;
  --yellow:#4a97d6;
  --maxw:80rem;
  --nav-h:5rem;

  /* ---- DARK THEME (Standard) ---- */
  --bg:#020617;
  --bg-alt:#0f172a;
  --bg-grad-a:#0f172a;
  --bg-grad-b:#020617;
  --surface:rgba(255,255,255,.05);
  --surface-hover:rgba(255,255,255,.10);
  --border:rgba(255,255,255,.10);
  --border-soft:rgba(255,255,255,.05);
  --border-strong:rgba(255,255,255,.20);
  --heading:#ffffff;
  --strong:#e2e8f0;
  --text:#cbd5e1;
  --muted:#9ca3af;
  --muted-2:#6b7280;
  --muted-3:#4b5563;
  --accent:#2680c2;
  --accent-hover:#1d6ba6;
  --nav-bg:rgba(2,6,23,.8);
  --nav-bg-scrolled:rgba(2,6,23,.95);
  --nav-shadow:0 10px 30px rgba(0,0,0,.4);
  --hero-dot:rgba(38,128,194,.15);
  --overlay-grad:linear-gradient(to top,rgba(2,6,23,.6),transparent);
  --card-shadow:none;
  --card-shadow-hover:none;
  --text-shadow:none;
  --logo-color:#ffffff;
  --logo-shadow:none;
  --btn-contrast-bg:#ffffff;
  --btn-contrast-fg:#020617;
  --cta-bg:rgba(38,128,194,.10);
  --card-box-bg:rgba(15,23,42,.4);
  --media-shadow:0 25px 50px rgba(38,128,194,.2);
}

/* ---- LIGHT THEME (Alternative, viel Weiß, Blau/Schwarz aus dem Bild) ---- */
[data-theme="light"]{
  --bg:#ffffff;
  --bg-alt:#f4f7fb;
  --bg-grad-a:#f4f7fb;
  --bg-grad-b:#ffffff;
  --surface:#ffffff;
  --surface-hover:#ffffff;
  --border:rgba(15,23,42,.10);
  --border-soft:rgba(15,23,42,.06);
  --border-strong:rgba(15,23,42,.18);
  --heading:#0f172a;
  --strong:#0f172a;
  --text:#334155;
  --muted:#5b6b7f;
  --muted-2:#8b98a8;
  --muted-3:#94a3b8;
  --accent:#2680c2;
  --accent-hover:#1d6ba6;
  --nav-bg:rgba(255,255,255,.85);
  --nav-bg-scrolled:rgba(255,255,255,.95);
  --nav-shadow:0 2px 8px rgba(15,23,42,.12);
  --hero-dot:rgba(38,128,194,.12);
  --overlay-grad:linear-gradient(to top,rgba(15,23,42,.30),transparent);
  --card-shadow:0 2px 4px rgba(15,23,42,.16);
  --card-shadow-hover:0 4px 8px rgba(15,23,42,.2);
  --text-shadow:0 1px 0 rgba(15,23,42,.22);
  --logo-color:#2680c2;
  --logo-shadow:drop-shadow(0 2px 1px rgba(15,23,42,.35));
  --btn-contrast-bg:#2680c2;
  --btn-contrast-fg:#ffffff;
  --cta-bg:rgba(38,128,194,.08);
  --card-box-bg:#ffffff;
  --media-shadow:0 4px 10px rgba(15,23,42,.18);
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:'Open Sans',system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  transition:background-color .3s ease,color .3s ease;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,p{margin:0}
::selection{background:var(--accent);color:#fff}

/* Schatten für Überschriften/Schrift (nur wirksam im Light-Theme via --text-shadow) */
h1,h2,h3,h4,.wordmark,.section-title,.h-section{text-shadow:var(--text-shadow)}

/* ---------- Layout ---------- */
.container{max-width:var(--maxw);margin:0 auto;padding:0 1rem}
.container-narrow{max-width:56rem;margin:0 auto;padding:0 1rem}
@media(min-width:640px){.container,.container-narrow{padding:0 1.5rem}}
@media(min-width:1024px){.container,.container-narrow{padding:0 2rem}}

.section{padding:6rem 0;position:relative}
.section--dark{background:var(--bg-alt)}
.section--darker{background:var(--bg)}
.section--grad{background:linear-gradient(to bottom,var(--bg-grad-a),var(--bg-grad-b))}
.bordered-top{border-top:1px solid var(--border-soft)}

/* ---------- Icons ---------- */
.icon{width:1.5rem;height:1.5rem;display:inline-block;vertical-align:middle;
  fill:none;stroke:currentColor;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round}
.icon--sm{width:1.15rem;height:1.15rem}
.icon--lg{width:1.75rem;height:1.75rem}
.c-blue{color:var(--accent)}.c-green{color:var(--green)}.c-purple{color:var(--purple)}.c-yellow{color:var(--yellow)}

/* ---------- Navigation ---------- */
.nav{position:fixed;top:0;left:0;width:100%;z-index:50;
  background:var(--nav-bg);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border-soft);transition:background .3s,box-shadow .3s}
.nav.scrolled{background:var(--nav-bg-scrolled);box-shadow:var(--nav-shadow)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h)}
.nav-right{display:flex;align-items:center;gap:.75rem}
.logo{display:flex;align-items:center;gap:.75rem;cursor:pointer}
.brand-logo{flex:none;display:block;background-color:var(--logo-color);-webkit-mask:url(azero-logo.png) no-repeat left center/contain;mask:url(azero-logo.png) no-repeat left center/contain;filter:var(--logo-shadow)}
.brand-logo--nav{height:3.25rem;width:13rem}
.logo .wordmark{color:var(--heading);font-weight:800;font-size:1.5rem;letter-spacing:-.02em}
.nav-links{display:none;align-items:baseline;gap:2rem}
.nav-links a{color:var(--text);font-size:.875rem;font-weight:500;padding:.5rem .75rem;transition:color .2s}
.nav-links a:hover{color:var(--green)}
.btn-nav{background:var(--btn-contrast-bg);color:var(--btn-contrast-fg)!important;border-radius:9999px;
  padding:.625rem 1.25rem;font-size:.875rem;font-weight:700;
  box-shadow:0 10px 15px rgba(0,0,0,.08);transition:background .2s,color .2s}
.btn-nav:hover{background:var(--green);color:#fff!important}
.nav-toggle,.theme-toggle{display:inline-flex;align-items:center;justify-content:center;padding:.5rem;
  color:var(--muted);background:none;border:0;border-radius:.375rem;cursor:pointer;transition:color .2s,background .2s}
.nav-toggle:hover,.theme-toggle:hover{color:var(--heading);background:var(--surface-hover)}
.nav-toggle .icon{width:1.6rem;height:1.6rem}
.theme-toggle .icon{width:1.4rem;height:1.4rem}
.icon-sun,.icon-moon{display:none}
html:not([data-theme="light"]) .icon-sun{display:inline-block}
[data-theme="light"] .icon-moon{display:inline-block}
.mobile-menu{display:none;background:var(--bg);border-bottom:1px solid var(--border)}
.mobile-menu.open{display:block}
.mobile-menu .inner{padding:.5rem .75rem .75rem;display:flex;flex-direction:column;gap:.25rem}
.mobile-menu a{color:var(--muted);padding:.5rem .75rem;border-radius:.375rem;font-weight:500}
.mobile-menu a:hover{color:var(--heading)}
.mobile-menu a.btn-mob{background:var(--accent);color:#fff;margin-top:.75rem}
@media(min-width:768px){.nav-links{display:flex}.nav-toggle{display:none}}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  border-radius:9999px;font-weight:600;transition:all .25s;cursor:pointer;border:1px solid transparent}
.btn-primary{padding:1rem 2rem;color:#fff;background:var(--accent);
  box-shadow:0 10px 15px rgba(38,128,194,.25)}
.btn-primary:hover{background:var(--accent-hover);box-shadow:0 12px 20px rgba(38,128,194,.4);transform:translateY(-2px)}
.btn-outline{padding:1rem 2rem;color:var(--heading);border-color:var(--border-strong)}
.btn-outline:hover{background:var(--surface)}
.btn-white{padding:1rem 2rem;font-size:1.125rem;font-weight:700;color:var(--btn-contrast-fg);background:var(--btn-contrast-bg);box-shadow:0 20px 25px rgba(15,23,42,.18)}
.btn-white:hover{filter:brightness(.96);transform:scale(1.05)}
.btn-ghost{padding:1rem 2rem;font-size:1.125rem;font-weight:700;color:var(--heading);border:2px solid var(--border-strong)}
.btn-ghost:hover{background:var(--surface)}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;
  overflow:hidden;padding-top:var(--nav-h);
  background-color:var(--bg);
  background-image:radial-gradient(var(--hero-dot) 1px,transparent 1px);
  background-size:40px 40px}
.blob{position:absolute;width:24rem;height:24rem;border-radius:9999px;filter:blur(100px);pointer-events:none}
.blob-blue{top:25%;left:25%;background:rgba(38,128,194,.2)}
.blob-green{bottom:25%;right:25%;background:rgba(90,169,224,.1)}
.hero-grid{position:relative;z-index:10;display:grid;grid-template-columns:1fr;gap:3rem;align-items:center;width:100%}
.badge{display:inline-flex;align-items:center;padding:.25rem .75rem;border-radius:9999px;
  border:1px solid rgba(90,169,224,.3);background:rgba(90,169,224,.12);color:var(--green);
  font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;margin-bottom:1.5rem}
.hero h1{font-size:3rem;font-weight:800;color:var(--heading);line-height:1.1;margin-bottom:1.5rem}
.gradient-text{background:linear-gradient(135deg,#5aa9e0 0%,#2680c2 100%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;text-shadow:none}
.hero-lead{font-size:1.25rem;color:var(--muted);margin-bottom:2rem;max-width:32rem}
.hero-actions{display:flex;flex-direction:column;gap:1rem}
.hero-media{display:none}
.media-card{position:relative;border-radius:1rem;overflow:hidden;border:1px solid var(--border);
  box-shadow:var(--media-shadow)}
.media-card img{width:100%;transition:transform .7s}
.media-card:hover img{transform:scale(1.05)}
.media-overlay{position:absolute;inset:0;z-index:10;background:var(--overlay-grad)}
.scroll-indicator{position:absolute;bottom:2.5rem;left:50%;transform:translateX(-50%);color:var(--muted-2);animation:bounce 1.5s infinite}
@media(min-width:640px){.hero-actions{flex-direction:row}}
@media(min-width:1024px){
  .hero h1{font-size:4.5rem}
  .hero-grid{grid-template-columns:1fr 1fr}
  .hero-media{display:block}
}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:1fr;gap:4rem;align-items:center}
.about-media{position:relative}
.about-glow{position:absolute;inset:-1rem;border-radius:9999px;filter:blur(24px);opacity:.2;
  background:linear-gradient(to right,var(--accent),var(--green))}
.about-media .frame{position:relative;border-radius:1rem;overflow:hidden;border:1px solid var(--border);box-shadow:var(--card-shadow)}
.about-media img{width:100%;object-fit:cover}
.h-section{font-size:1.875rem;font-weight:700;color:var(--heading);margin-bottom:1.5rem;line-height:1.2}
.about p{color:var(--muted);font-size:1.125rem;margin-bottom:1.5rem}
.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin-top:.5rem}
.stat{padding:1rem;border-radius:.75rem;background:var(--surface);border:1px solid var(--border-soft);box-shadow:var(--card-shadow)}
.stat .icon{width:1.9rem;height:1.9rem;margin-bottom:.5rem}
.stat h4{color:var(--heading);font-weight:600}
.stat p{color:var(--muted-2);font-size:.875rem;margin:0}
@media(min-width:768px){
  .about-grid{grid-template-columns:1fr 1fr}
  .about-media{order:1}.about-copy{order:2}
  .h-section{font-size:2.25rem}
}

/* ---------- Section head ---------- */
.section-head{text-align:center;margin-bottom:4rem}
.eyebrow{color:var(--accent);font-weight:600;letter-spacing:.08em;text-transform:uppercase;font-size:.875rem}
.section-title{font-size:1.875rem;font-weight:700;color:var(--heading);margin-top:.5rem}
.divider{width:6rem;height:.25rem;margin:1.5rem auto 0;border-radius:9999px;
  background:linear-gradient(to right,var(--accent),var(--green))}
@media(min-width:768px){.section-title{font-size:3rem}}

/* ---------- Cards (Kompetenzen) ---------- */
.cards{display:grid;grid-template-columns:1fr;gap:2rem}
.card{padding:2rem;border-radius:1rem;background:var(--surface);border:1px solid var(--border-soft);
  box-shadow:var(--card-shadow);transition:background .3s,transform .3s,box-shadow .3s}
.card:hover{background:var(--surface-hover);transform:translateY(-.5rem);box-shadow:var(--card-shadow-hover)}
.card-icon{width:3.5rem;height:3.5rem;border-radius:.75rem;display:flex;align-items:center;justify-content:center;margin-bottom:1.5rem;transition:background .3s,color .3s}
.card-icon .icon{width:1.75rem;height:1.75rem}
.card-icon.blue{background:rgba(38,128,194,.15);color:var(--accent)}
.card-icon.green{background:rgba(90,169,224,.2);color:var(--green)}
.card-icon.purple{background:rgba(28,95,151,.2);color:var(--purple)}
.card:hover .card-icon.blue{background:var(--accent);color:#fff}
.card:hover .card-icon.green{background:var(--green);color:#fff}
.card:hover .card-icon.purple{background:var(--purple);color:#fff}
.card h3{font-size:1.25rem;font-weight:700;color:var(--heading);margin-bottom:1rem}
.card p{color:var(--muted)}
.link-arrow{display:inline-flex;align-items:center;gap:.5rem;color:var(--accent);font-weight:500;margin-top:3rem;transition:color .2s}
.link-arrow:hover{color:var(--heading)}
.center{text-align:center}
@media(min-width:768px){.cards{grid-template-columns:repeat(3,1fr)}}

/* ---------- Leistungen ---------- */
.services-grid{display:grid;grid-template-columns:1fr;gap:4rem}
.services-media{position:relative;height:16rem;width:100%;border-radius:1rem;overflow:hidden;border:1px solid var(--border);margin-top:2rem;box-shadow:var(--card-shadow)}
.services-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.services-media:hover img{transform:scale(1.05)}
.service-list{display:flex;flex-direction:column;gap:1rem}
.service{display:flex;align-items:flex-start;padding:1.5rem;border-radius:.75rem;
  background:var(--surface);border:1px solid var(--border-soft);box-shadow:var(--card-shadow);transition:border-color .25s,box-shadow .25s}
.service:hover{border-color:rgba(90,169,224,.5);box-shadow:var(--card-shadow-hover)}
.service-icon{flex-shrink:0;margin-top:.15rem}
.service-icon .icon{width:1.5rem;height:1.5rem}
.service-text{margin-left:1rem}
.service-text h4{font-size:1.125rem;font-weight:700;color:var(--heading)}
.service-text p{color:var(--muted);font-size:.875rem;margin-top:.25rem}
@media(min-width:1024px){.services-grid{grid-template-columns:1fr 1fr}}

/* ---------- CTA ---------- */
.cta{position:relative;overflow:hidden;padding:6rem 0}
.cta-bg{position:absolute;inset:0;background:var(--cta-bg)}
.cta .inner{position:relative;z-index:10;text-align:center}
.cta h2{font-size:2.25rem;font-weight:700;color:var(--heading);margin-bottom:1.5rem}
.cta p{font-size:1.25rem;color:var(--text);margin-bottom:2.5rem}
.cta-actions{display:flex;flex-direction:column;justify-content:center;gap:1.5rem}
@media(min-width:640px){.cta-actions{flex-direction:row}}
@media(min-width:768px){.cta h2{font-size:3rem}}

/* ---------- Footer ---------- */
.footer{background:var(--bg);border-top:1px solid var(--border);padding:4rem 0 2rem}
.footer-grid{display:grid;grid-template-columns:1fr;gap:3rem;margin-bottom:3rem}
.brand-logo--footer{height:2rem;width:8rem;margin-bottom:1rem}
.footer-brand .wordmark{color:var(--heading);font-weight:800;font-size:1.25rem;margin-bottom:1rem;display:inline-block}
.footer-brand p{color:var(--muted-2);font-size:.875rem}
.footer h4{color:var(--heading);font-weight:700;margin-bottom:1rem}
.footer ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.5rem}
.footer ul a{color:var(--muted);font-size:.875rem;transition:color .2s}
.footer ul a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid var(--border);padding-top:2rem;display:flex;flex-direction:column;
  align-items:center;gap:1rem}
.footer-bottom p{color:var(--muted-3);font-size:.875rem;margin:0}
.social a{color:var(--muted-2);transition:color .2s}
.social a:hover{color:var(--heading)}
@media(min-width:768px){
  .footer-grid{grid-template-columns:repeat(3,1fr)}
  .footer-bottom{flex-direction:row;justify-content:space-between}
}

/* ---------- Legal pages (Impressum / Datenschutz) ---------- */
.page-header{position:relative;padding:8rem 0 3rem;overflow:hidden}
.page-header .blob{top:0;left:25%}
.back-link{display:inline-flex;align-items:center;gap:.5rem;color:var(--muted);font-size:.875rem;margin-bottom:1.5rem;transition:color .2s}
.back-link:hover{color:var(--accent)}
.page-header h1{font-size:2.25rem;font-weight:800;color:var(--heading);letter-spacing:-.02em;line-height:1.15}
.page-header .subtitle{margin-top:.75rem;color:var(--muted)}
.page-header .divider{margin:1.5rem 0 0}
@media(min-width:768px){.page-header h1{font-size:3rem}}
.legal{padding-bottom:6rem}
.legal .card-box{background:var(--card-box-bg);border:1px solid var(--border);border-radius:1rem;padding:2rem;
  font-size:.95rem;color:var(--text);box-shadow:var(--card-shadow)}
.legal h2{font-size:1.5rem;font-weight:700;color:var(--heading);margin:3rem 0 1rem}
.legal h2:first-child{margin-top:0}
.legal h3{font-size:1.125rem;font-weight:600;color:var(--heading);margin:1.5rem 0 .5rem}
.legal p{margin:0 0 1rem}
.legal strong,.legal b{color:var(--strong)}
.legal a{color:var(--accent);word-break:break-word;transition:color .2s}
.legal a:hover{color:var(--heading)}
.legal ul{margin:0 0 1rem;padding-left:1.25rem}
.legal li{margin-bottom:.25rem}
.legal .rule{border-top:1px solid var(--border);margin:0}
@media(min-width:768px){.legal .card-box{padding:3rem}}

/* ---------- Animations ---------- */
@keyframes bounce{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(-25%)}}
@keyframes fadeInUp{to{opacity:1;transform:translateY(0)}}
.fade-in-up{opacity:0;transform:translateY(20px);animation:fadeInUp .8s ease-out forwards}
.delay-200{animation-delay:.2s}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}