/* ============================================
   InterTechno Engineering GmbH — v5
   Schlicht & klassisch. Texte und Fotos vom Kunden.
   ============================================ */

:root {
  --green: #38A648;
  --green-dark: #2C853A;
  --blue: #1785D6;

  --ink: #1C262E;
  --ink-2: #4A565F;

  --bg: #FFFFFF;
  --bg-2: #F5F7F5;
  --rule: #E2E6E2;

  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --container: 1080px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

.container.narrow { max-width: 820px; }

@media (max-width: 760px) { .container { padding: 0 20px; } }

section { padding: 72px 0; }
section.tinted { background: var(--bg-2); }

@media (max-width: 768px) { section { padding: 48px 0; } }

h1, h2, h3 { line-height: 1.2; color: var(--ink); }

h1 { font-size: clamp(2rem, 4.5vw, 3rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 2.6vw, 1.9rem); font-weight: 700; margin-bottom: 0.9rem; }
h3 { font-size: 1.15rem; font-weight: 600; margin: 1.5rem 0 0.5rem; }

p { color: var(--ink-2); max-width: 70ch; }
p + p { margin-top: 0.9rem; }

.claim {
  margin-top: 1.25rem;
  padding-left: 16px;
  border-left: 3px solid var(--green);
  color: var(--ink);
  font-weight: 600;
}

/* Listen: normale Bullets */
.plain-list {
  margin: 0.75rem 0 0 1.25rem;
  color: var(--ink-2);
}

.plain-list li { padding: 3px 0; }
.plain-list li::marker { color: var(--green); }

.two-col {
  columns: 2;
  column-gap: 48px;
  max-width: 780px;
}

@media (max-width: 640px) { .two-col { columns: 1; } }

/* ---------- Button ---------- */
.btn {
  display: inline-block;
  padding: 13px 26px;
  background: var(--green);
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 4px;
  border: none;
  cursor: pointer;
}

.btn:hover { background: var(--green-dark); text-decoration: none; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 100;
  border-bottom: 1px solid var(--rule);
}

.site-header.scrolled { box-shadow: 0 2px 10px rgba(28,38,46,0.08); }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 32px;
  max-width: var(--container);
  margin: 0 auto;
}

@media (max-width: 880px) { .nav { padding: 10px 20px; } }

.brand-logo { height: 46px; width: auto; }

@media (max-width: 480px) { .brand-logo { height: 36px; } }

.nav-links {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--ink-2);
}

.nav-links a:hover { color: var(--ink); text-decoration: none; }

.nav-toggle {
  display: none;
  background: transparent; border: none; cursor: pointer;
  padding: 8px;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
}

.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--ink); position: relative;
  transition: background 0.2s ease;
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: ""; position: absolute; left: 0;
  width: 22px; height: 2px; background: var(--ink);
  transition: transform 0.2s ease, top 0.2s ease;
}
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after  { top: 7px; }

.nav-toggle.open span { background: transparent; }
.nav-toggle.open span::before { transform: rotate(45deg); top: 0; }
.nav-toggle.open span::after  { transform: rotate(-45deg); top: 0; }

@media (max-width: 880px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: fixed; top: 0; right: 0;
    width: min(300px, 85vw); height: 100vh;
    background: var(--bg);
    border-left: 1px solid var(--rule);
    flex-direction: column;
    gap: 0; padding: 80px 24px 24px;
    transform: translateX(100%);
    transition: transform 0.25s ease;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links li { border-bottom: 1px solid var(--rule); }
  .nav-links a { display: block; padding: 14px 0; font-size: 1rem; }
}

/* ---------- Hero ---------- */
.hero { padding: 64px 0; border-bottom: 1px solid var(--rule); }

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 48px;
  align-items: center;
}

@media (max-width: 880px) {
  .hero-inner { grid-template-columns: 1fr; gap: 28px; }
  .hero { padding: 40px 0; }
}

.hero h1 .accent { color: var(--green); }

.hero-sub {
  font-size: 1.15rem;
  margin: 1rem 0 1.75rem;
  color: var(--ink-2);
}

.hero-photo { border-radius: 6px; }

/* ---------- Text + Foto ---------- */
.text-photo {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: start;
}

.text-photo img { border-radius: 6px; position: sticky; top: 100px; }

@media (max-width: 880px) {
  .text-photo { grid-template-columns: 1fr; gap: 28px; }
  .text-photo img { position: static; }
}

/* ---------- Wasser schützen: zwei Blöcke ---------- */
.two-blocks {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.two-blocks h3 { margin-top: 0.75rem; }

@media (max-width: 880px) { .two-blocks { grid-template-columns: 1fr; gap: 16px; } }

/* ---------- Referenzen ---------- */
.ref-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 1.5rem;
}

@media (max-width: 820px) { .ref-grid { grid-template-columns: 1fr; } }

.ref-grid figure {
  border: 1px solid var(--rule);
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg);
}

.ref-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.ref-grid figcaption {
  padding: 10px 14px;
  font-size: 0.9rem;
  color: var(--ink-2);
  border-top: 1px solid var(--rule);
}

/* ---------- Kontakt ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 48px;
  align-items: start;
  margin-top: 0.5rem;
}

@media (max-width: 820px) { .contact-grid { grid-template-columns: 1fr; gap: 32px; } }

.contact-info p + p { margin-top: 1rem; }

.contact-form { display: grid; gap: 16px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }

.field { display: flex; flex-direction: column; gap: 5px; }

.field label { font-size: 0.88rem; font-weight: 600; color: var(--ink); }

.field input,
.field textarea {
  background: var(--bg);
  border: 1px solid #C9D1C9;
  border-radius: 4px;
  font-family: var(--font);
  font-size: 1rem;
  color: var(--ink);
  padding: 10px 12px;
  min-height: 44px;
  resize: vertical;
}

.field textarea { min-height: 130px; }

.field input:focus,
.field textarea:focus { outline: 2px solid var(--green); outline-offset: -1px; border-color: var(--green); }

.form-submit { justify-self: start; }

.form-note { font-size: 0.85rem; margin-top: 2px; }

.form-success {
  display: none;
  padding: 18px 20px;
  background: rgba(56,166,72,0.09);
  border: 1px solid rgba(56,166,72,0.45);
  border-radius: 4px;
}

.form-success.visible { display: block; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink);
  color: rgba(255,255,255,0.75);
  padding: 28px 0;
  font-size: 0.9rem;
}

.site-footer a { color: rgba(255,255,255,0.9); }

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }

.footer-links .credit { color: rgba(255,255,255,0.5); }

/* ---------- Unterseiten (Impressum / Datenschutz) ---------- */
.page-content { padding: 56px 0; }
.page-content h1 { font-size: 1.8rem; margin-bottom: 1.25rem; }
.page-content h2 { font-size: 1.2rem; margin-top: 2rem; }
.page-content p { margin-top: 0.75rem; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}