:root {
  --ink: #16201c;
  --muted: #66736d;
  --paper: #f6f3ea;
  --paper-strong: #fffdf7;
  --mist: #e9efe9;
  --line: #d6d1c3;
  --water: #1f7681;
  --water-deep: #12464d;
  --logo-blue: #4168cc;
  --reed: #526f43;
  --moss: #263f34;
  --clay: var(--logo-blue);
  --gold: var(--logo-blue);
  --stone: #8a8f86;
  --white: #ffffff;
  --shadow: 0 18px 44px rgba(22, 32, 28, 0.14);
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.55;
}

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

a {
  color: inherit;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  right: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(18px, 4vw, 54px);
  color: var(--white);
  transition: background 180ms ease, box-shadow 180ms ease, color 180ms ease;
}

.site-header.is-scrolled,
.site-header.is-open,
.site-header.on-light {
  color: var(--ink);
  background: rgba(255, 253, 247, 0.94);
  box-shadow: 0 12px 32px rgba(22, 32, 28, 0.12);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  width: min(280px, 54vw);
}

.brand img {
  width: 100%;
  height: auto;
  filter: brightness(0) invert(1);
}

.site-header.is-scrolled .brand img,
.site-header.is-open .brand img,
.site-header.on-light .brand img {
  filter: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.4vw, 30px);
  font-size: 0.92rem;
  font-weight: 700;
}

.site-nav a {
  position: relative;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: -7px;
  left: 0;
  height: 2px;
  background: currentColor;
  content: "";
  opacity: 0;
  transform: scaleX(0.5);
  transition: opacity 160ms ease, transform 160ms ease;
}

.site-nav a:hover::after,
body[data-page="home"] .site-nav a[href$="index.html"]::after,
body[data-page="schwimmteich"] .site-nav a[href*="schwimmteich/"]::after,
body[data-page="schwimmteich-niederoesterreich"] .site-nav a[href*="schwimmteich/"]::after,
body[data-page="naturpool"] .site-nav a[href*="naturpool/"]::after,
body[data-page="naturpool-wien"] .site-nav a[href*="naturpool/"]::after,
body[data-page="naturpool-steiermark"] .site-nav a[href*="naturpool/"]::after,
body[data-page="hotel"] .site-nav a[href*="hotel-oeffentlich/"]::after,
body[data-page="technik"] .site-nav a[href*="technik/"]::after,
body[data-page="referenzen"] .site-nav a[href*="referenzen/"]::after,
body[data-page="kontakt"] .site-nav a[href*="kontakt/"]::after,
body[data-page="kontakt"] .site-nav a[href="./"]::after {
  opacity: 1;
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid currentColor;
  border-radius: 4px;
  color: inherit;
  background: transparent;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
}

.hero,
.page-hero {
  position: relative;
  display: grid;
  overflow: hidden;
  color: var(--white);
}

.hero {
  min-height: 78svh;
  align-items: end;
  padding: 150px clamp(20px, 6vw, 82px) 82px;
}

.page-hero {
  min-height: 62svh;
  align-items: end;
  padding: 150px clamp(20px, 6vw, 82px) 64px;
}

.hero-media,
.hero-shade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-media {
  object-fit: cover;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(8, 17, 15, 0.76), rgba(8, 17, 15, 0.32) 54%, rgba(8, 17, 15, 0.08)),
    linear-gradient(0deg, rgba(8, 17, 15, 0.58), rgba(8, 17, 15, 0.06) 55%);
}

.hero-content {
  position: relative;
  width: min(790px, 100%);
}

.page-hero .hero-content {
  width: min(880px, 100%);
}

.eyebrow,
.section-kicker {
  display: block;
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.08;
  letter-spacing: 0;
}

h1 {
  max-width: 930px;
  font-size: clamp(2.65rem, 7vw, 6.9rem);
}

.hero h1,
.page-hero h1 {
  font-size: clamp(2.3rem, 5.4vw, 5.4rem);
}

h2 {
  font-size: clamp(2rem, 4.2vw, 4rem);
}

h3 {
  font-size: clamp(1.18rem, 2vw, 1.55rem);
}

p {
  margin: 0;
}

.hero-copy,
.lead {
  max-width: 720px;
  margin-top: 22px;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(1.06rem, 2vw, 1.28rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border: 1px solid currentColor;
  border-radius: 4px;
  font-weight: 800;
  text-decoration: none;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.button.primary {
  border-color: var(--gold);
  color: var(--white);
  background: var(--gold);
}

.button.primary:hover {
  border-color: var(--gold);
  color: var(--gold);
  background: var(--white);
}

.button.secondary {
  color: inherit;
  background: rgba(255, 255, 255, 0.08);
}

.button.secondary:hover {
  color: var(--ink);
  background: var(--white);
}

.button.dark {
  border-color: var(--moss);
  color: var(--white);
  background: var(--moss);
}

.section {
  padding: clamp(68px, 9vw, 118px) clamp(20px, 5vw, 56px);
}

.section-inner,
.section-heading,
.split,
.cards,
.project-grid,
.footer-inner,
.region-grid,
.process-grid,
.feature-grid,
.text-columns,
.gallery-strip,
.contact-grid,
.shape-grid {
  width: min(var(--max), 100%);
  margin: 0 auto;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(260px, 0.85fr);
  gap: clamp(24px, 5vw, 72px);
  align-items: end;
  margin-bottom: clamp(30px, 5vw, 56px);
}

.section-heading p,
.split p,
.text-columns p,
.feature-card p,
.project-card p,
.process-step p,
.region-card p,
.contact-card p,
.note p {
  color: var(--muted);
}

.trust-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
}

.trust-band div {
  min-height: 126px;
  padding: 28px clamp(20px, 4vw, 48px);
  background: var(--paper-strong);
}

.trust-band strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1.08rem;
}

.trust-band span {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(300px, 1fr);
  gap: clamp(28px, 6vw, 76px);
  align-items: center;
}

.split.reverse {
  grid-template-columns: minmax(300px, 1fr) minmax(0, 0.95fr);
}

.split-media {
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

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

.split-copy > p {
  margin-top: 20px;
  font-size: 1.08rem;
}

.mini-list {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.mini-list li {
  padding-left: 18px;
  border-left: 3px solid var(--gold);
  color: var(--muted);
}

.cards,
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.service-card,
.feature-card,
.project-card,
.process-step,
.region-card,
.contact-card,
.shape-card,
.note {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper-strong);
}

.service-card img,
.project-card img,
.shape-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.service-card div,
.project-card div,
.shape-card div,
.feature-card,
.process-step,
.region-card,
.contact-card,
.note {
  padding: 24px;
}

.service-card h3,
.project-card h3,
.feature-card h3,
.process-step h3,
.region-card h3,
.shape-card h3 {
  margin-bottom: 12px;
}

.service-card a,
.project-card a,
.region-card > a {
  display: inline-flex;
  margin-top: 18px;
  color: var(--water-deep);
  font-weight: 800;
  text-decoration: none;
}

.region-card h3 a {
  color: inherit;
  text-decoration: none;
}

.region-card h3 a:hover {
  color: var(--water-deep);
}

.band {
  color: var(--white);
  background: var(--moss);
}

.band .section-kicker,
.band .section-heading p,
.band .split p,
.band .text-columns p {
  color: rgba(255, 255, 255, 0.76);
}

.band .button.secondary {
  color: var(--white);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.process-step {
  min-height: 210px;
}

.process-step span {
  display: block;
  margin-bottom: 26px;
  color: var(--clay);
  font-size: 0.88rem;
  font-weight: 900;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.project-card[data-hidden="true"] {
  display: none;
}

.filter-row,
.variant-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  width: min(var(--max), 100%);
  margin: -20px auto 34px;
}

.filter-button,
.variant-button {
  min-height: 40px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--ink);
  background: var(--paper-strong);
  font-weight: 800;
}

.filter-button.is-active,
.variant-button.is-active {
  border-color: var(--water);
  color: var(--white);
  background: var(--water);
}

.region-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.text-columns {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(22px, 5vw, 64px);
}

.text-columns h2 {
  margin-bottom: 18px;
}

.text-columns p + p {
  margin-top: 14px;
}

.gallery-strip {
  display: grid;
  grid-template-columns: 1.3fr 0.8fr 0.9fr;
  gap: 14px;
}

.gallery-strip img {
  width: 100%;
  height: 100%;
  min-height: 280px;
  border-radius: 8px;
  object-fit: cover;
}

.cta {
  padding: clamp(58px, 8vw, 92px) clamp(20px, 5vw, 56px);
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(18, 70, 77, 0.95), rgba(38, 63, 52, 0.95)),
    var(--water-deep);
}

.cta-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 32px;
  align-items: center;
  width: min(var(--max), 100%);
  margin: 0 auto;
}

.cta p {
  max-width: 680px;
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.78);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 18px;
}

.shape-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
}

.shape-card p {
  color: var(--muted);
}

.shape-model {
  display: block;
  margin-bottom: 8px;
  color: var(--water-deep);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.shape-note {
  width: min(var(--max), 100%);
  margin: 24px auto 0;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.42fr);
  gap: clamp(22px, 5vw, 44px);
  width: min(var(--max), 100%);
  margin: 0 auto;
  align-items: start;
}

.contact-side {
  display: grid;
  gap: 18px;
}

.contact-form {
  display: grid;
  gap: 18px;
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper-strong);
}

.form-heading {
  margin-bottom: 8px;
}

.form-heading h2 {
  font-size: clamp(1.65rem, 3vw, 2.55rem);
}

.form-heading p,
.form-note {
  margin-top: 12px;
  color: var(--muted);
}

.form-alert {
  margin: 0;
  padding: 12px 14px;
  border: 1px solid #b94a48;
  border-radius: 4px;
  color: #7a211f;
  background: #fff1ef;
  font-weight: 800;
}

.field-hint {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 400;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.contact-form label {
  display: grid;
  gap: 7px;
  color: var(--ink);
  font-weight: 700;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  min-height: 46px;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--ink);
  background: var(--white);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.45;
}

.contact-form textarea {
  resize: vertical;
}

.contact-form ::placeholder {
  color: rgba(102, 115, 109, 0.72);
}

.optional-fields {
  padding-top: 6px;
  border-top: 1px solid var(--line);
}

.optional-fields summary {
  cursor: pointer;
  color: var(--water-deep);
  font-weight: 900;
}

.optional-fields .form-grid {
  margin-top: 14px;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: 2px solid rgba(31, 118, 129, 0.28);
  border-color: var(--water);
}

.contact-form input.is-invalid,
.contact-form textarea.is-invalid {
  border-color: #b94a48;
  background: #fffafa;
}

.field-error {
  color: #7a211f;
  font-size: 0.92rem;
  font-weight: 700;
}

.privacy-check {
  grid-template-columns: auto 1fr;
  align-items: start;
  font-weight: 400;
}

.privacy-check .field-error {
  grid-column: 2;
}

.privacy-check input {
  width: 18px;
  min-height: 18px;
  margin-top: 3px;
}

.form-hidden {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.form-submit {
  width: fit-content;
}

.contact-card a {
  color: var(--water-deep);
  font-weight: 800;
  text-decoration: none;
}

.contact-result {
  min-height: 62svh;
  padding-top: 150px;
}

.contact-result h1 {
  color: var(--ink);
  font-size: clamp(2.2rem, 5vw, 4.6rem);
}

.contact-result .button.secondary {
  color: var(--water-deep);
  background: var(--white);
}

.site-footer {
  padding: 54px clamp(20px, 5vw, 56px);
  color: var(--white);
  background: #111916;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1.1fr 0.8fr;
  gap: 30px;
  align-items: start;
}

.footer-logo {
  width: min(260px, 100%);
  margin-bottom: 18px;
  filter: brightness(0) invert(1);
}

.site-footer a {
  display: inline-block;
  color: inherit;
  text-decoration: none;
}

.site-footer address,
.site-footer p {
  color: rgba(255, 255, 255, 0.72);
  font-style: normal;
}

.footer-links {
  display: grid;
  gap: 8px;
}

.legal {
  width: min(860px, 100%);
  margin: 0 auto;
}

.legal h2 {
  margin: 34px 0 12px;
  font-size: clamp(1.5rem, 3vw, 2.4rem);
}

.legal p {
  margin-top: 12px;
  color: var(--muted);
}

@media (max-width: 920px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    top: 76px;
    right: 14px;
    left: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--ink);
    background: var(--paper-strong);
    box-shadow: var(--shadow);
  }

  .site-header.is-open .site-nav {
    display: flex;
  }

  .site-nav a {
    padding: 15px 18px;
    border-bottom: 1px solid var(--line);
  }

  .site-nav a:last-child {
    border-bottom: 0;
  }

  .site-nav a::after {
    display: none;
  }

  .section-heading,
  .split,
  .split.reverse,
  .cta-inner,
  .footer-inner,
  .contact-layout,
  .text-columns {
    grid-template-columns: 1fr;
  }

  .trust-band,
  .cards,
  .feature-grid,
  .project-grid,
  .process-grid,
  .region-grid,
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .hero {
    min-height: 76svh;
    padding: 124px 20px 58px;
  }

  .page-hero {
    min-height: 58svh;
    padding: 124px 20px 48px;
  }

  .actions,
  .cta .actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .trust-band,
  .cards,
  .feature-grid,
  .project-grid,
  .process-grid,
  .form-grid,
  .region-grid,
  .contact-grid,
  .gallery-strip {
    grid-template-columns: 1fr;
  }

  .gallery-strip img {
    min-height: 220px;
  }
}