/* =========================================================
   KLIMAFIX — Stylesheet
   Palette: Frost (kühl, innen) trifft Sonnenorange (warm, außen)
   ========================================================= */

:root{
  --bg:        #F5FAFA;
  --bg-card:   #FFFFFF;
  --ink:       #0B1F26;
  --ink-soft:  #4C6870;
  --teal:      #0FA3B1;
  --teal-deep: #0C4A57;
  --teal-line: #0B8794;
  --mint:      #E1F5F4;
  --mint-line: #C6E9E7;
  --sun:       #FF8C42;
  --sun-deep:  #E4671F;
  --line:      #DCE9E9;
  --shadow:    0 12px 30px -14px rgba(11,31,38,0.25);

  --font-display: "Space Grotesk", "Segoe UI", Arial, sans-serif;
  --font-body:    "Inter", "Segoe UI", Arial, sans-serif;
  --font-mono:    "IBM Plex Mono", "Consolas", monospace;

  --sidebar-w: 264px;
  --radius: 14px;
}

*{ box-sizing: border-box; }
html{ -webkit-text-size-adjust: 100%; }
body{
  margin:0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color: inherit; text-decoration: none; }
h1,h2,h3,h4{
  font-family: var(--font-display);
  line-height: 1.12;
  margin: 0 0 .5em 0;
  letter-spacing: -0.01em;
}
p{ margin: 0 0 1em 0; }
ul{ margin:0; padding:0; list-style:none; }
button{ font-family: inherit; cursor:pointer; }

:focus-visible{
  outline: 3px solid var(--sun);
  outline-offset: 2px;
}

.eyebrow{
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--teal-deep);
  display:inline-flex;
  align-items:center;
  gap:.5em;
}
.eyebrow::before{
  content:"";
  width:8px; height:8px;
  border-radius:50%;
  background: var(--sun);
  display:inline-block;
}

/* ---------- Layout shell ---------- */
.app{
  display:flex;
  min-height:100vh;
}

/* ---------- Sidebar (desktop) ---------- */
.sidebar{
  width: var(--sidebar-w);
  flex: 0 0 var(--sidebar-w);
  background: var(--teal-deep);
  color: #EAF7F7;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  padding: 28px 24px;
  position: sticky;
  top:0;
  height:100vh;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom: 40px;
}
.brand__mark{
  width:38px; height:38px;
  border-radius:10px;
  background: linear-gradient(155deg, var(--teal) 0%, var(--sun) 130%);
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
}
.brand__mark svg{ width:22px; height:22px; }
.brand__text{ line-height:1.1; }
.brand__name{
  font-family: var(--font-display);
  font-weight:700;
  font-size:1.15rem;
  color:#fff;
}
.brand__tag{
  display:block;
  font-family: var(--font-mono);
  font-size:.68rem;
  letter-spacing:.06em;
  color: #9FD9DA;
  margin-top:2px;
}

.nav{ flex:1; }
.nav-link{
  display:flex;
  align-items:center;
  gap:12px;
  padding: 12px 14px;
  border-radius: 10px;
  font-size:.96rem;
  font-weight:500;
  color: #CDE9E9;
  margin-bottom:4px;
  transition: background .15s ease, color .15s ease;
}
.nav-link svg{ width:18px; height:18px; flex-shrink:0; opacity:.85; }
.nav-link:hover{ background: rgba(255,255,255,0.08); color:#fff; }
.nav-link.is-active{
  background: var(--teal);
  color:#04262b;
  font-weight:700;
}
.nav-link.is-active svg{ opacity:1; }

.sidebar__cta{
  margin: 18px 0 22px 0;
  display:block;
  text-align:center;
  background: var(--sun);
  color:#2b1200;
  font-weight:700;
  padding: 12px 14px;
  border-radius: 10px;
  font-size:.92rem;
  transition: transform .15s ease, background .15s ease;
}
.sidebar__cta:hover{ background: var(--sun-deep); transform: translateY(-1px); }

.sidebar__contact{
  border-top: 1px solid rgba(255,255,255,0.14);
  padding-top:16px;
  font-size:.84rem;
  color:#AFD9D9;
}
.sidebar__contact a{ color:#EAF7F7; font-weight:600; }
.sidebar__contact div{ margin-bottom:4px; }

/* ---------- Topbar (mobile) ---------- */
.topbar{
  display:none;
  position: sticky;
  top:0;
  z-index: 40;
  background: var(--teal-deep);
  color:#fff;
  align-items:center;
  justify-content:space-between;
  padding: 12px 16px;
}
.topbar .brand{ margin:0; }
.topbar .brand__name{ font-size:1.02rem; }
.menu-btn{
  background:none;
  border: 1px solid rgba(255,255,255,0.35);
  border-radius:8px;
  width:42px; height:42px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:#fff;
}
.menu-btn svg{ width:20px; height:20px; }

.overlay{
  display:none;
  position:fixed;
  inset:0;
  background: rgba(6,20,24,0.55);
  z-index: 45;
}
.overlay.is-open{ display:block; }

/* ---------- Main content ---------- */
.main{
  flex:1;
  min-width:0;
}
.container{
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 40px;
}
section{ padding: 72px 0; }
section + section{ border-top: 1px solid var(--line); }

.section-head{
  max-width: 620px;
  margin-bottom: 40px;
}
.section-head h2{ font-size: clamp(1.6rem, 3vw, 2.1rem); }
.section-head p{ color: var(--ink-soft); font-size:1.02rem; }

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding: 13px 22px;
  border-radius: 10px;
  font-weight:700;
  font-size:.95rem;
  border: none;
}
.btn-primary{ background: var(--sun); color:#2b1200; }
.btn-primary:hover{ background: var(--sun-deep); }
.btn-outline{ background: transparent; color: var(--teal-deep); border: 1.5px solid var(--teal-line); }
.btn-outline:hover{ background: var(--mint); }
.btn-block{ width:100%; justify-content:center; }

/* ---------- Hero ---------- */
.hero{
  padding-top: 64px;
  display:grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 48px;
  align-items:center;
}
.hero h1{
  font-size: clamp(2.1rem, 4.4vw, 3.15rem);
  margin-top:.4em;
}
.hero__lead{ font-size:1.08rem; color: var(--ink-soft); max-width: 46ch; }
.hero__actions{ display:flex; gap:14px; margin-top:26px; flex-wrap:wrap; }
.hero__proof{
  display:flex;
  gap: 26px;
  margin-top: 38px;
  flex-wrap:wrap;
}
.hero__proof div{ font-family: var(--font-mono); font-size:.78rem; color: var(--ink-soft); }
.hero__proof strong{
  display:block;
  font-family: var(--font-display);
  font-size:1.3rem;
  color: var(--ink);
}

/* Signature: 15-minute install ring */
.ring-wrap{
  position:relative;
  width: 280px;
  height:280px;
  margin: 0 auto;
}
.ring-wrap svg{ width:100%; height:100%; transform: rotate(-90deg); }
.ring-track{ fill:none; stroke: var(--mint-line); stroke-width: 14; }
.ring-fill{
  fill:none;
  stroke: url(#ringGradient);
  stroke-width: 14;
  stroke-linecap: round;
  stroke-dasharray: 754;
  stroke-dashoffset: 754;
  animation: ringFill 2.6s ease-out .4s forwards;
}
@keyframes ringFill{ to{ stroke-dashoffset: 40; } }
.ring-center{
  position:absolute; inset:0;
  display:flex; flex-direction:column;
  align-items:center; justify-content:center;
  text-align:center;
}
.ring-center strong{
  font-family: var(--font-display);
  font-size: 2.6rem;
  color: var(--teal-deep);
  line-height:1;
}
.ring-center span{
  font-family: var(--font-mono);
  font-size:.72rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  color: var(--ink-soft);
  margin-top:6px;
}
@media (prefers-reduced-motion: reduce){
  .ring-fill{ animation: none; stroke-dashoffset: 40; }
}

/* ---------- Value grid ---------- */
.value-grid{
  display:grid;
  grid-template-columns: repeat(3,1fr);
  gap: 22px;
}
.value-card{
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 22px;
}
.value-card__icon{
  width:44px; height:44px;
  border-radius:10px;
  background: var(--mint);
  display:flex; align-items:center; justify-content:center;
  margin-bottom:16px;
}
.value-card__icon svg{ width:22px; height:22px; color: var(--teal-deep); }
.value-card h3{ font-size:1.06rem; }
.value-card p{ color: var(--ink-soft); font-size:.94rem; margin:0; }

/* ---------- Steps (real sequence: installation order) ---------- */
.steps{
  display:grid;
  grid-template-columns: repeat(3,1fr);
  gap: 24px;
  counter-reset: step;
}
.step{ position:relative; padding-left: 4px; }
.step__num{
  font-family: var(--font-mono);
  font-size:.78rem;
  color: var(--sun-deep);
  display:block;
  margin-bottom:10px;
}
.step h3{ font-size:1.02rem; }
.step p{ color: var(--ink-soft); font-size:.93rem; }

/* ---------- Products teaser / grid ---------- */
.products-teaser-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.mini-card{
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  transition: transform .15s ease, box-shadow .15s ease;
}
.mini-card:hover{ transform: translateY(-3px); box-shadow: var(--shadow); }
.mini-card .art{ background: var(--mint); border-radius:10px; padding:14px; margin-bottom:14px; }
.mini-card h4{ font-size:.98rem; margin-bottom:2px; }
.mini-card .price{ font-family: var(--font-mono); color: var(--teal-deep); font-weight:700; }

/* ---------- Testimonial ---------- */
.testimonial{
  background: var(--teal-deep);
  color: #EAF7F7;
  border-radius: var(--radius);
  padding: 40px;
  display:grid;
  grid-template-columns: repeat(2,1fr);
  gap: 28px;
}
.testimonial blockquote{
  margin:0 0 12px 0;
  font-family: var(--font-display);
  font-size:1.12rem;
  line-height:1.4;
}
.testimonial cite{
  font-style:normal;
  font-family: var(--font-mono);
  font-size:.78rem;
  color:#9FD9DA;
}

/* ---------- Filter bar (products page) ---------- */
.filter-bar{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  margin-bottom: 32px;
}
.filter-btn{
  background: var(--bg-card);
  border: 1.5px solid var(--line);
  border-radius: 999px;
  padding: 9px 18px;
  font-size:.86rem;
  font-weight:600;
  color: var(--ink-soft);
}
.filter-btn.is-active{
  background: var(--teal);
  border-color: var(--teal);
  color: #04262b;
}

.product-grid{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}
.product-card{
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow:hidden;
  display:flex;
  flex-direction:column;
}
.product-card__art{
  background: var(--mint);
  padding: 28px;
  display:flex;
  align-items:center;
  justify-content:center;
  position:relative;
}
.product-card__badge{
  position:absolute;
  top:14px; left:14px;
  background: var(--sun);
  color:#2b1200;
  font-family: var(--font-mono);
  font-size:.68rem;
  font-weight:700;
  letter-spacing:.04em;
  padding: 5px 10px;
  border-radius: 999px;
}
.product-card__body{ padding: 22px 22px 24px; flex:1; display:flex; flex-direction:column; }
.product-card__body h3{ font-size:1.12rem; margin-bottom:2px; }
.product-card__tagline{ color: var(--ink-soft); font-size:.9rem; margin-bottom:16px; }

.spec-table{
  width:100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size:.82rem;
  margin-bottom: 18px;
}
.spec-table tr{ border-top: 1px solid var(--line); }
.spec-table tr:first-child{ border-top:none; }
.spec-table td{ padding: 7px 0; color: var(--ink-soft); }
.spec-table td:last-child{ text-align:right; color: var(--ink); font-weight:600; }

.product-card__footer{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}
.product-card__price{
  font-family: var(--font-display);
  font-weight:700;
  font-size:1.2rem;
  color: var(--teal-deep);
}
.product-card__price small{
  display:block;
  font-family: var(--font-body);
  font-weight:400;
  font-size:.72rem;
  color: var(--ink-soft);
}

/* ---------- Contact page ---------- */
.contact-grid{
  display:grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items:start;
}
.form-row{ display:grid; grid-template-columns: 1fr 1fr; gap:16px; margin-bottom:16px; }
.form-field{ display:flex; flex-direction:column; gap:6px; margin-bottom:16px; }
.form-field label{ font-size:.86rem; font-weight:600; }
.form-field input,
.form-field select,
.form-field textarea{
  border: 1.5px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size:.95rem;
  background: var(--bg-card);
  color: var(--ink);
}
.form-field textarea{ resize: vertical; min-height:130px; }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus{ border-color: var(--teal); }
.checkbox-field{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:.86rem;
  color: var(--ink-soft);
  margin-bottom: 22px;
}
.checkbox-field input{ margin-top:3px; }
.hp-field{ position:absolute; left:-9999px; }

.form-status{
  border-radius: 10px;
  padding: 14px 16px;
  font-size:.9rem;
  margin-bottom:20px;
}
.form-status.success{ background:#DFF3E3; color:#1D6B33; border:1px solid #B7E2C0; }
.form-status.error{ background:#FBE4E1; color:#9A2E20; border:1px solid #F2C1BA; }

.info-card{
  background: var(--teal-deep);
  color:#EAF7F7;
  border-radius: var(--radius);
  padding: 28px;
}
.info-card h3{ font-size:1.05rem; color:#fff; }
.info-card .row{ display:flex; gap:12px; margin-bottom:16px; align-items:flex-start; }
.info-card .row svg{ width:19px; height:19px; flex-shrink:0; margin-top:2px; color: var(--sun); }
.info-card .row div{ font-size:.9rem; color:#CDE9E9; }
.info-card .row strong{ display:block; color:#fff; font-size:.92rem; margin-bottom:2px; }
.info-card .hours{ border-top:1px solid rgba(255,255,255,0.16); margin-top:6px; padding-top:16px; }

/* ---------- Legal / Impressum ---------- */
.legal h2{ font-size:1.25rem; margin-top:1.6em; }
.legal h2:first-child{ margin-top:0; }
.legal p, .legal li{ color: var(--ink-soft); font-size:.96rem; }
.legal li{ margin-bottom:4px; }
.legal a{ color: var(--teal-deep); font-weight:600; text-decoration:underline; }

/* ---------- Footer ---------- */
.site-footer{
  border-top: 1px solid var(--line);
  padding: 30px 0 40px;
}
.site-footer .container{
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:12px;
  font-size:.82rem;
  color: var(--ink-soft);
}
.site-footer a{ font-weight:600; color: var(--teal-deep); }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 1000px){
  .hero{ grid-template-columns:1fr; }
  .ring-wrap{ order:-1; width:220px; height:220px; margin: 0 auto 12px; }
  .value-grid, .products-teaser-grid, .steps{ grid-template-columns: repeat(2,1fr); }
  .product-grid{ grid-template-columns: 1fr; }
  .testimonial{ grid-template-columns:1fr; }
  .contact-grid{ grid-template-columns:1fr; }
}

@media (max-width: 880px){
  .sidebar{ display:none; }
  .topbar{ display:flex; }
  .sidebar.is-mobile-open{
    display:flex;
    position:fixed;
    z-index:50;
    top:0; left:0;
    height:100vh;
    box-shadow: 20px 0 40px rgba(0,0,0,0.25);
    animation: slideIn .22s ease-out;
  }
  @keyframes slideIn{ from{ transform: translateX(-100%);} to{ transform: translateX(0);} }
  .container{ padding: 0 20px; }
  section{ padding: 48px 0; }
}

@media (max-width: 620px){
  .value-grid, .products-teaser-grid, .steps{ grid-template-columns: 1fr; }
  .form-row{ grid-template-columns:1fr; }
  .hero__proof{ gap:18px; }
}