/* ==========================================================================
   ClottenLab – Landingpage
   Responsives Stylesheet (Mobile-first)
   Breakpoints: ≥768px (Tablet-Anpassungen), ≥1200px (Desktop-Layout)
   ========================================================================== */

:root{
  --medical-blue:#436DEA;
  --magenta:#E2007A;
  --berry:#991355;
  --gray-150:#222222;
  --gray-text:#3B3B3F;
  --gray-soft:#6E6E73;
  --line:#E7E8EE;
  --gradient: linear-gradient(90deg, var(--medical-blue) 0%, #7C5FC7 50%, var(--magenta) 100%);

  --container-width: 1220px;
  --gutter: 20px;
}

*{ box-sizing:border-box; }
html,body{ margin:0; padding:0; }
body{
  font-family:'Barlow',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  background:#FFFFFF;
  color:var(--gray-text);
  -webkit-font-smoothing:antialiased;
  line-height:1.45;
}
img{ max-width:100%; }

/* ==========================================================================
   Top bar / navigation
   ========================================================================== */
.topbar{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px var(--gutter) 16px;
}
.topbar img{ height:52px; width:auto; display:block; }

.burger-menu{
  width:44px;
  height:44px;
  border-radius:50%;
  border:1.5px solid var(--line);
  background:#FFFFFF;
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
  padding:0;
  cursor:pointer;
}
.burger-menu svg{ width:20px; height:20px; }

.nav-links{
  display:none;
  align-items:center;
  gap:40px;
}
.nav-links a{
  font-size:15px;
  font-weight:500;
  color:var(--gray-text);
  text-decoration:none;
}
.nav-links a:hover{ color:var(--medical-blue); }

/* Mobile dropdown menu – plain white box under the burger button */
.mobile-nav{
  display:none;
  flex-direction:column;
  position:absolute;
  top:calc(100% + 8px);
  right:var(--gutter);
  min-width:220px;
  background:#FFFFFF;
  border:1px solid var(--line);
  border-radius:12px;
  box-shadow:0 12px 28px rgba(34,34,34,0.12);
  padding:8px;
  z-index:20;
}
.mobile-nav.open{ display:flex; }
.mobile-nav a{
  padding:12px 14px;
  font-size:15px;
  font-weight:500;
  color:var(--gray-text);
  text-decoration:none;
  border-radius:8px;
}
.mobile-nav a:hover{ background:#F5F6FA; color:var(--medical-blue); }
.mobile-nav a + a{ margin-top:2px; }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero{
  padding:14px var(--gutter) 6px;
}
.hero-top{ overflow:hidden; }
h1{
  font-weight:400;
  font-size:34px;
  line-height:1.14;
  margin:0;
  letter-spacing:-0.01em;
  max-width:22ch;
}
h1 .grad{
  background:var(--gradient);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  color:var(--magenta);
  font-weight:400;
}
h1 .dark{ color:#161616; font-weight:400; }

.hero-img{ width:100%; margin:16px 0 4px; }
.hero-img img{ width:100%; height:auto; display:block; }

.lede{
  font-size:17.5px;
  color:var(--gray-text);
  margin:14px 0 20px;
  max-width:70ch;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.cta{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  width:100%;
  text-decoration:none;
  background:#FFFFFF;
  color:var(--medical-blue);
  font-weight:500;
  font-size:16px;
  padding:14px 20px;
  border-radius:100px;
  border:1.8px solid var(--medical-blue);
  cursor:pointer;
  transition:background .15s ease;
}
.cta:hover{ background:#F3F6FE; }
.cta svg{ width:18px; height:18px; flex-shrink:0; }

.medical-note{
  font-size:15.5px;
  font-style:italic;
  color:var(--gray-text);
  line-height:1.5;
  margin:0 0 20px;
}

.final-cta{
  margin:34px var(--gutter) 0;
  text-align:center;
}

/* ==========================================================================
   Generic section
   ========================================================================== */
.section{ padding:34px var(--gutter) 8px; }
.section-head{ margin-bottom:22px; max-width:640px; }
.kicker{
  font-size:13px;
  font-weight:600;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--magenta);
  margin:0 0 6px;
}
h2{
  font-size:23px;
  font-weight:600;
  color:#161616;
  margin:0;
  letter-spacing:-0.01em;
}
h2 span{
  background:var(--gradient);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}

/* ==========================================================================
   Steps
   ========================================================================== */
.steps-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
  padding-top:10px;
}
.step-card{ position:relative; }
.step-top{
  display:flex;
  align-items:center;
  gap:14px;
  margin-bottom:14px;
}
.step-num{
  font-size:34px;
  font-weight:700;
  line-height:1;
  letter-spacing:-0.02em;
  background:var(--gradient);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  opacity:0.9;
}
.step-icon{
  width:38px; height:38px;
  display:flex; align-items:center; justify-content:center;
  color:var(--gray-150);
  flex-shrink:0;
}
.step-icon svg{ width:30px; height:30px; }
.step-kicker{
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--magenta);
  margin:0 0 5px;
}
.step-title{
  font-size:17px;
  font-weight:600;
  color:#161616;
  margin:0 0 6px;
}
.step-desc{
  font-size:15.5px;
  color:var(--gray-soft);
  margin:0;
}

/* ==========================================================================
   FAQ
   ========================================================================== */
.faq-section{ padding:34px var(--gutter) 8px; }
.faq-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:0;
  align-items:start;
}
.faq-cat{ margin:0 0 28px; }
.faq-cat:last-child{ margin-bottom:4px; }
.faq-cat-title{
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--magenta);
  margin:0 0 4px;
}
.faq-item{ border-bottom:1px solid var(--line); }
.faq-item:last-child{ border-bottom:none; }
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:15px 0;
  font-size:15px;
  font-weight:600;
  color:#161616;
}
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-plus{ flex-shrink:0; width:18px; height:18px; position:relative; }
.faq-plus::before,
.faq-plus::after{
  content:'';
  position:absolute;
  background:var(--medical-blue);
  border-radius:2px;
}
.faq-plus::before{ left:0; top:8px; width:18px; height:2px; }
.faq-plus::after{ left:8px; top:0; width:2px; height:18px; transition:opacity .15s ease; }
.faq-item[open] .faq-plus::after{ opacity:0; }
.faq-item p{
  margin:0 0 16px;
  font-size:15.5px;
  color:var(--gray-soft);
  padding-right:30px;
  max-width:60ch;
}

/* App install / setup content inside FAQ */
.faq-intro{ font-size:15.5px; color:var(--gray-text); margin:0 0 4px; max-width:60ch; }

.download-row{ display:flex; flex-wrap:wrap; gap:10px; margin-top:12px; }
.download-btn{
  display:inline-flex; align-items:center; gap:7px; text-decoration:none;
  background:var(--medical-blue); color:#FFFFFF; font-weight:600; font-size:14px;
  padding:10px 16px; border-radius:100px;
}
.download-btn svg{ width:16px; height:16px; flex-shrink:0; }

.download-qr-row{ display:none; gap:16px; margin-top:12px; }
.download-qr-item{ text-align:center; }
.download-qr-item img{
  width:60px; height:60px; border:1.5px solid var(--line); border-radius:10px; padding:4px; background:#FFFFFF;
  display:block;
}
.download-qr-item span{ display:block; font-size:11px; color:var(--gray-soft); margin-top:6px; }

.app-setup-short{ display:block; }
.app-setup-full{ display:none; }

.app-steps{
  display:flex; flex-direction:column; gap:24px;
  margin-top:4px;
}
.app-step{ display:flex; align-items:flex-start; gap:14px; }
.app-step-num{
  font-size:26px; font-weight:700; line-height:1; letter-spacing:-0.02em; flex-shrink:0; width:30px;
  background:var(--gradient); -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent;
}
.app-step-body{ flex:1; min-width:0; }
.app-step-title{
  font-size:12.5px; font-weight:700; letter-spacing:.05em; text-transform:uppercase; color:var(--berry); margin:0 0 5px;
}
.app-step-desc{ font-size:15px; color:var(--gray-text); margin:0; line-height:1.55; }
.app-step-qr{
  width:60px; height:60px; border:1.5px solid var(--line); border-radius:10px; padding:4px; background:#FFFFFF;
  flex-shrink:0;
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer{ margin-top:40px; }
.contact-band{
  background:#EDEDED;
  border-top:6px solid var(--berry);
}
.contact-band-inner{ padding:26px var(--gutter) 24px; }
.contact-band-title{
  color:var(--berry);
  font-size:18px;
  font-weight:600;
  letter-spacing:0.01em;
  margin:0 0 18px;
}
.contact-band-grid{
  display:flex;
  flex-direction:column;
  gap:12px;
  font-size:13.5px;
  color:var(--gray-text);
  line-height:1.5;
  margin:0;
  padding:0;
  list-style:none;
}
.contact-band-grid a{ color:var(--berry); text-decoration:none; }
.contact-band-grid a:hover{ text-decoration:underline; }

.footer-bottom{
  display:flex;
  flex-direction:column;
  gap:16px;
  padding:24px var(--gutter) 34px;
}
.footer-row{ display:flex; flex-direction:column; gap:16px; }
footer img{ height:20px; width:auto; align-self:flex-start; }
.footer-links{
  display:flex;
  flex-wrap:wrap;
  gap:7px 14px;
  margin:0;
  padding:0;
}
.footer-links a{
  font-size:12px;
  color:var(--gray-soft);
  text-decoration:none;
}
.footer-links a:hover{ color:var(--medical-blue); text-decoration:underline; }
.footer-copyright{
  font-size:11.5px;
  color:var(--gray-soft);
  margin:0;
}
.footer-limbach{
  font-size:12px;
  color:var(--medical-blue);
  font-weight:500;
  text-decoration:none;
}
.footer-limbach:hover{ text-decoration:underline; }


/* ==========================================================================
   Tablet – ab 768px
   ========================================================================== */
@media (min-width:768px){
  :root{ --gutter:40px; }

  .topbar img{ height:60px; }

  h1{ font-size:44px; max-width:16ch; }
  .hero-top{
    display:grid;
    grid-template-columns:minmax(320px,1fr) minmax(260px,340px);
    align-items:center;
    gap:28px;
  }
  .hero-img{ margin:0; }
  .lede{ max-width:640px; }

  .final-cta{ max-width:480px; margin-left:auto; margin-right:auto; }
  .cta{ width:auto; display:inline-flex; padding:15px 32px; }

  .section{ padding:56px var(--gutter) 8px; }
  .section-head{ margin-bottom:36px; }
  .kicker{ font-size:12.5px; }
  h2{ font-size:29px; }

  .steps-grid{
    grid-template-columns:repeat(2,1fr);
    gap:40px 36px;
  }
  /* Staggering the right column makes the 1→2, 3→4, 5→6 reading order
     unambiguous instead of reading like two independent columns. */
  .step-card:nth-child(2n){ margin-top:60px; }
  .step-title{ font-size:18px; }
  .step-desc{ max-width:320px; }

  .faq-section{ padding:56px var(--gutter) 8px; }
  .faq-item summary{ font-size:16.5px; padding:18px 0; }
  .faq-item p{ font-size:14.5px; max-width:600px; }
  .faq-intro{ font-size:14.5px; }

  .footer-row{ flex-direction:row; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:20px; }
  .contact-band-inner{ padding:32px var(--gutter) 30px; }
  .contact-band-grid{ flex-direction:row; flex-wrap:wrap; gap:14px 48px; }
  .footer-bottom{ padding:26px var(--gutter) 40px; }
  footer img{ height:22px; }
}


/* ==========================================================================
   Desktop – ab 1200px
   ========================================================================== */
@media (min-width:1200px){
  :root{ --gutter:48px; }

  .topbar{ max-width:var(--container-width); margin:0 auto; padding:32px var(--gutter) 8px; }
  .topbar img{ height:46px; }
  .burger-menu{ display:none; }
  .mobile-nav{ display:none !important; }
  .nav-links{ display:flex; }

  .hero{ max-width:var(--container-width); margin:0 auto; padding:56px var(--gutter) 96px; }
  h1{ font-size:54px; max-width:14ch; }
  .hero-top{ grid-template-columns:minmax(360px,440px) 1fr; gap:32px; }
  .hero-img{ max-width:600px; justify-self:end; }
  .lede{ font-size:19px; line-height:1.55; max-width:900px; }

  .medical-note{ font-size:17px; max-width:640px; margin:0 auto 24px; }
  .final-cta{ max-width:none; margin:64px 0 0; }
  .cta{ font-size:16.5px; padding:16px 34px; }

  .section{ max-width:var(--container-width); margin:0 auto; padding:0 var(--gutter) 108px; }
  .section-head{ margin-bottom:52px; }
  .kicker{ font-size:13px; }
  h2{ font-size:36px; }

  .steps-grid{ grid-template-columns:repeat(3,1fr); gap:52px 44px; }
  .step-card:nth-child(2n){ margin-top:0; }
  .step-num{ font-size:38px; }
  .step-icon{ width:40px; height:40px; }
  .step-icon svg{ width:32px; height:32px; }
  .step-title{ font-size:19px; }
  .step-desc{ font-size:14.5px; max-width:320px; }

  .faq-section{ max-width:var(--container-width); margin:0 auto; padding:0 var(--gutter) 108px; }
  .faq-grid{ grid-template-columns:1fr 1fr; gap:8px 88px; }
  .faq-cat{ margin:0 0 40px; }
  .faq-item summary{ font-size:16px; padding:17px 0; }
  .faq-item p{ max-width:480px; }
  .faq-intro{ max-width:480px; }

  .download-row{ display:none; }
  .download-qr-row{ display:flex; }

  .app-setup-short{ display:none; }
  .app-setup-full{ display:block; }

  .app-steps{ gap:26px; }
  .app-step-num{ font-size:30px; width:38px; }
  .app-step-body{ padding-top:3px; }
  .app-step-desc{ font-size:14.5px; line-height:1.6; }
  .app-step-qr{ width:72px; height:72px; }

  footer{ margin-top:16px; }
  .contact-band-inner{ max-width:var(--container-width); margin:0 auto; padding:40px var(--gutter); }
  .contact-band-title{ font-size:22px; margin:0 0 22px; }
  .contact-band-grid{ gap:0 64px; font-size:14.5px; }
  .footer-bottom{ max-width:var(--container-width); margin:0 auto; padding:28px var(--gutter) 56px; gap:20px; }
  footer img{ height:24px; }
  .footer-links{ gap:8px 24px; }
  .footer-links a{ font-size:13px; }
  .footer-copyright{ font-size:12px; }
  .footer-limbach{ font-size:13px; }
}