/* =========================================================
   AT Innenausbau GmbH – Nachbau
   ========================================================= */

:root {
  --blue: #2f5c96;
  --blue-dark: #1f3a5f;
  --blue-light: #4b7ab8;
  --ink: #2b2b2b;
  --text: #444444;
  --text-light: #f8faf4;
  --gray-bg: #f4f5f6;
  --border: #e4e6e8;
  --radius: 4px;
  --container: 1200px;
  --font: "Open Sans", HelveticaNeue, "Helvetica Neue", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
  background: #fff;
}

img { max-width: 100%; display: block; }

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font);
  font-weight: 800;
  color: var(--blue-dark);
  margin: 0 0 16px;
  line-height: 1.25;
}

.btn {
  display: inline-block;
  padding: 13px 30px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .03em;
  text-transform: uppercase;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); text-decoration: none; }
.btn-outline { background: transparent; border-color: var(--blue); color: var(--blue); }
.btn-outline:hover { background: var(--blue); color: #fff; text-decoration: none; }
.btn-outline-light { background: transparent; border-color: #fff; color: #fff; }
.btn-link { background: none; border: none; color: #e58fc0; text-decoration: underline; text-transform: none; font-weight: 400; }

/* ================= HEADER ================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-img {
  height: auto;
  max-height: 50px;
  width: auto;
}
.logo-text {
  font-size: 15px;
  letter-spacing: .02em;
  color: var(--blue-dark);
  font-weight: 400;
}
.logo-text strong { font-weight: 800; }

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 34px;
  margin: 0;
  padding: 0;
  align-items: center;
}
.main-nav a {
  color: #333;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: .02em;
  padding: 8px 2px;
  text-decoration: none;
  border-bottom: 2px solid transparent;
}
.main-nav a:hover,
.main-nav a.active { color: var(--blue); border-color: var(--blue); }
.main-nav a.nav-btn {
  background: var(--blue);
  color: #fff;
  padding: 10px 22px;
  border-radius: var(--radius);
  border: none;
}
.main-nav a.nav-btn:hover { background: var(--blue-dark); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span { width: 24px; height: 2px; background: var(--blue-dark); }

/* ================= HERO ================= */
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  background-color: #eef1f3;
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(20,30,45,.55), rgba(20,30,45,.35));
  z-index: 1;
}
.hero-inner { position: relative; z-index: 2; max-width: 640px; }
.hero-eyebrow {
  color: #cfe0f5;
  text-transform: uppercase;
  letter-spacing: .12em;
  font-weight: 700;
  font-size: 13px;
  margin-bottom: 10px;
}
.hero h1 {
  color: var(--text-light);
  font-size: 40px;
  margin-bottom: 28px;
  text-shadow: 0 2px 10px rgba(0,0,0,.35);
}

/* ================= VALUES ================= */
.values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  padding: 56px 24px;
}
.value-item .icon { color: var(--blue); margin-bottom: 12px; }
.value-item h3 {
  text-transform: uppercase;
  font-size: 16px;
  letter-spacing: .04em;
}
.value-item p { font-size: 14.5px; }

/* ================= INFO BAND ================= */
.info-band {
  background: var(--blue);
  color: var(--text-light);
  padding: 70px 0 60px;
  position: relative;
}
.info-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 60px;
}
.info-eyebrow {
  text-transform: uppercase;
  letter-spacing: .1em;
  font-size: 13px;
  font-weight: 700;
  color: #cfe0f5;
  margin-bottom: 6px;
}
.info-band h2 {
  color: #fff;
  text-transform: uppercase;
  font-size: 30px;
  max-width: 480px;
}
.divider { border: none; border-top: 3px solid rgba(255,255,255,.5); width: 60px; margin: 22px 0; }
.info-band p { color: #eaf0f7; font-size: 15px; }

.info-right { display: flex; flex-direction: column; gap: 28px; }
.feature-row { display: flex; gap: 18px; }
.feature-row .icon { color: #d9e6f5; margin-top: 4px; flex-shrink: 0; }
.feature-row h4 { color: #fff; text-transform: uppercase; font-size: 15px; margin-bottom: 6px; }
.feature-row p { color: #dde8f4; font-size: 14px; margin: 0; }
.feature-row p strong { color: #fff; }

.band-arrow {
  text-align: center;
  color: var(--blue);
  font-size: 30px;
  position: relative;
  margin-top: -1px;
}
.info-band .band-arrow { color: var(--blue); background: transparent; }
.info-band + .band-arrow { }

/* ================= PROJECTS ================= */
.projects { padding: 70px 24px; text-align: center; }
.section-title { text-transform: uppercase; font-size: 30px; }
.section-subtitle { color: #6b6b6b; max-width: 620px; margin: 0 auto 30px; }

.project-filters {
  display: flex;
  justify-content: center;
  gap: 26px;
  margin-bottom: 30px;
  font-size: 14px;
}
.filter-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: #6b6b6b;
  font-family: var(--font);
  font-size: 14px;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}
.filter-btn span { color: #a5a5a5; }
.filter-btn.active,
.filter-btn:hover { color: var(--blue); border-color: var(--blue); }

.project-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: left;
}
.project-card {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  transition: transform .2s ease, box-shadow .2s ease;
}
.project-card:hover { transform: translateY(-4px); box-shadow: 0 10px 24px rgba(0,0,0,.08); }
.project-card.is-hidden { display: none; }
.project-thumb { height: 190px; background-size: cover; background-position: center; }
.thumb-1 { background: linear-gradient(135deg,#8a9aa8,#c7cfd6); }
.thumb-2 { background: linear-gradient(135deg,#a9b7bd,#e2e7e4); }
.thumb-3 { background: linear-gradient(135deg,#b7c1bb,#dfe6df); }
.thumb-4 { background: linear-gradient(135deg,#6f7f83,#a9bdbf); }
.project-card figcaption { padding: 14px 16px; font-size: 14px; font-weight: 600; color: var(--blue-dark); }

/* ================= TESTIMONIALS ================= */
.testimonials { background: var(--blue); color: #fff; padding: 64px 0 70px; text-align: center; }
.testimonials h2 { color: #fff; text-transform: uppercase; font-size: 28px; margin-bottom: 40px; }
.testimonial-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px 60px;
  text-align: left;
}
.testimonial-grid blockquote { margin: 0; }
.testimonial-grid p { color: #eaf0f7; font-size: 15px; }
.testimonial-grid footer { margin-top: 10px; font-size: 14px; }
.testimonial-grid footer strong { display: block; color: #fff; }
.testimonial-grid footer span { color: #cfe0f5; }

/* ================= FORM ================= */
.request-form { padding: 70px 24px; text-align: center; }
.form-wrap { max-width: 720px; margin: 0 auto; text-align: left; }

.form-steps {
  display: flex;
  justify-content: center;
  list-style: none;
  padding: 0;
  margin: 0 0 40px;
  gap: 50px;
}
.form-steps li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #a5a5a5;
  font-weight: 600;
  font-size: 14px;
}
.form-steps li span {
  width: 30px; height: 30px;
  border-radius: 50%;
  border: 2px solid #d5d5d5;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px;
}
.form-steps li.active { color: var(--blue-dark); }
.form-steps li.active span { border-color: var(--blue); background: var(--blue); color: #fff; }
.form-steps li.done span { border-color: var(--blue); color: var(--blue); }

.form-step { border: none; padding: 0; margin: 0; display: none; }
.form-step.active { display: block; }
.form-step legend { font-weight: 700; color: var(--blue-dark); font-size: 18px; margin-bottom: 20px; padding: 0; }

.option-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.option-card {
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 14px;
  text-align: center;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  transition: border-color .2s ease, background .2s ease;
}
.option-card .icon { color: var(--blue); }
.option-card input { position: absolute; opacity: 0; pointer-events: none; }
.option-card:has(input:checked) { border-color: var(--blue); background: #eef4fb; }
.option-card span { font-weight: 600; font-size: 14px; color: var(--blue-dark); }

.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 18px; }
.form-step label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; font-weight: 600; color: var(--blue-dark); }
.form-step input[type="text"],
.form-step input[type="email"],
.form-step input[type="tel"],
.form-step input[type="number"] {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 11px 12px;
  font-size: 14px;
  font-family: var(--font);
}
.checkbox-row { display: flex; align-items: flex-start; gap: 8px; font-size: 13px; font-weight: 400; margin: 14px 0; }
.checkbox-row input { margin-top: 3px; }

.form-actions { display: flex; justify-content: flex-end; gap: 14px; margin-top: 26px; }

.form-success {
  margin-top: 24px;
  padding: 14px 18px;
  background: #eaf7ee;
  border: 1px solid #bfe3c9;
  border-radius: var(--radius);
  color: #216b3e;
  font-weight: 600;
}

/* ================= CONTACT CTA ================= */
.contact-cta { background: var(--gray-bg); padding: 46px 0; }
.contact-cta-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}
.contact-question { font-size: 20px; color: var(--ink); margin: 0; }
.contact-question strong { color: var(--blue-dark); }
.contact-phone-block { text-align: right; }
.contact-phone { font-size: 26px; font-weight: 800; color: var(--blue-dark); }
.contact-alt { margin: 4px 0 0; font-size: 13px; font-style: italic; color: #777; }

/* ================= FOOTER ================= */
.site-footer { background: var(--blue); color: #dde8f4; }
.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  padding: 56px 24px 30px;
}
.site-footer h5 { color: #fff; text-transform: uppercase; font-size: 14px; letter-spacing: .06em; margin-bottom: 18px; }
.site-footer p { font-size: 14px; margin: 0 0 10px; }
.site-footer a { color: #dde8f4; }
.site-footer a:hover { color: #fff; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; font-size: 14px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.15);
  padding: 18px 24px;
  font-size: 12.5px;
  color: #bcd0e6;
}

/* ================= COOKIE BANNER ================= */
.cookie-banner {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  background: #1c1c1c;
  color: #f1f1f1;
  padding: 16px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  z-index: 200;
  font-size: 13.5px;
}
.cookie-banner p { margin: 0; max-width: 480px; }
.cookie-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.cookie-banner.hidden { display: none; }

/* ================= RESPONSIVE ================= */
@media (max-width: 900px) {
  .info-grid, .testimonial-grid, .footer-grid { grid-template-columns: 1fr; }
  .project-grid { grid-template-columns: repeat(2, 1fr); }
  .values { grid-template-columns: 1fr; }
  .option-grid { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .main-nav {
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    display: none;
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; align-items: flex-start; gap: 0; padding: 10px 24px 20px; }
  .main-nav li { width: 100%; }
  .main-nav a { display: block; padding: 12px 0; }
  .main-nav a.nav-btn { display: inline-block; margin-top: 8px; }
  .hero h1 { font-size: 30px; }
  .project-grid { grid-template-columns: 1fr; }
  .contact-cta-inner { text-align: left; }
  .contact-phone-block { text-align: left; }
  .form-steps { gap: 22px; }
}

/* ================= LEGAL PAGES (Impressum / Datenschutz) ================= */
.legal-hero {
  background: var(--blue);
  padding: 54px 0;
}
.legal-hero h1 {
  color: #fff;
  margin: 0;
  font-size: 32px;
  text-transform: uppercase;
}
.legal-content {
  padding: 50px 24px 80px;
  max-width: 860px;
}
.legal-content h2 {
  font-size: 20px;
  margin-top: 40px;
  color: var(--blue-dark);
}
.legal-content h2:first-child { margin-top: 0; }
.legal-content h3 {
  font-size: 16px;
  margin-top: 26px;
  color: var(--blue-dark);
}
.legal-content p { font-size: 14.5px; margin: 0 0 14px; }
.legal-content a { word-break: break-word; }
.legal-note {
  margin-top: 34px;
  padding: 14px 18px;
  background: #fff7e6;
  border: 1px solid #f0dfa8;
  border-radius: var(--radius);
  font-size: 13.5px;
  color: #6b5510;
}