/**
 * Code Credits
 * Project: Betriebsheilkunde
 * Owner: Torsten Nixdorf
 * Coding Brand: Nixdorf Media
 * Purpose: Static website foundation.
 *
 * Rules:
 * - UTF-8 with German umlauts
 * - no secrets in source code
 */

:root {
  --color-primary: #0093de;
  --color-primary-dark: #006fa8;
  --color-ink: #20252b;
  --color-ink-soft: #303944;
  --color-muted: #5f6873;
  --color-line: #ccd8e2;
  --color-soft: #f3f7fa;
  --color-soft-strong: #e8f0f6;
  --color-blue-soft: #e9f7fd;
  --color-white: #ffffff;
  --font-body: "Aptos", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-display: "Bahnschrift", "Aptos Display", "Segoe UI", Arial, sans-serif;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --radius: 8px;
  --shadow-soft: 0 20px 48px rgba(32, 37, 43, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  color: var(--color-ink);
  font-family: var(--font-body);
  letter-spacing: 0;
  line-height: 1.55;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--color-white);
}

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

a {
  color: inherit;
}

:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 4px;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0;
  text-wrap: balance;
}

h1 {
  max-width: 12em;
  margin-bottom: var(--space-3);
  font-size: 4.25rem;
  line-height: 1.02;
}

h2 {
  max-width: 12em;
  margin-bottom: var(--space-4);
  font-size: 3rem;
  line-height: 1.08;
}

h3 {
  margin-bottom: var(--space-2);
  font-size: 1.2rem;
  line-height: 1.25;
}

p {
  text-wrap: pretty;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: var(--space-4);
  z-index: 20;
  transform: translateY(-150%);
  background: var(--color-ink);
  color: var(--color-white);
  padding: var(--space-2) var(--space-3);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--color-line);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-3) var(--space-6);
}

.brand-link {
  display: inline-flex;
  flex: 0 0 auto;
}

.brand-link img {
  width: min(240px, 62vw);
}

.nav-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
  color: var(--color-ink-soft);
  font-size: 0.96rem;
}

.nav-links a {
  text-decoration: none;
  transition: color 180ms ease, background-color 180ms ease, transform 180ms ease;
}

.nav-links a:hover {
  color: var(--color-primary-dark);
}

.nav-links a:active,
.button:active {
  transform: translateY(1px);
}

.nav-cta,
.button {
  border: 1px solid var(--color-primary);
  border-radius: var(--radius);
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0.72rem 1rem;
  text-decoration: none;
  font-weight: 700;
}

.nav-cta {
  color: var(--color-primary-dark);
  background: var(--color-white);
}

.nav-cta:hover {
  background: var(--color-blue-soft);
}

.hero {
  position: relative;
  display: block;
  min-height: 680px;
  margin: 0;
  overflow: hidden;
  border-bottom: 1px solid var(--color-line);
  background: var(--color-white);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.98) 0%,
    rgba(255, 255, 255, 0.94) 39%,
    rgba(255, 255, 255, 0.52) 62%,
    rgba(255, 255, 255, 0.08) 100%
  );
  pointer-events: none;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: block;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-copy {
  position: relative;
  z-index: 2;
  width: min(1200px, 100%);
  margin: 0 auto;
  padding: 5.5rem var(--space-6) var(--space-16);
  min-width: 0;
}

.eyebrow {
  margin: 0 0 var(--space-3);
  color: var(--color-primary-dark);
  font-size: 0.8rem;
  font-weight: 800;
  line-height: 1.25;
  text-transform: uppercase;
}

.lead,
.section-lead {
  max-width: 42rem;
  color: var(--color-muted);
  font-size: 1.18rem;
}

.hero-statement {
  max-width: 13em;
  margin-bottom: var(--space-5);
  color: var(--color-ink-soft);
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.14;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.button {
  transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

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

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

.button-secondary {
  color: var(--color-primary-dark);
  background: var(--color-white);
}

.button-secondary:hover {
  background: var(--color-blue-soft);
}

.hero-path {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  max-width: 44rem;
  margin: var(--space-8) 0 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  list-style: none;
}

.hero-path li {
  min-width: 0;
  padding: 0 0 0 var(--space-3);
  border-left: 4px solid var(--color-primary);
  color: var(--color-ink-soft);
  font-weight: 700;
}

.hero-path li:first-child {
  border-left: 4px solid var(--color-primary);
}

.hero-path span {
  display: block;
  margin-bottom: var(--space-1);
  color: var(--color-primary-dark);
  font-size: 0.76rem;
  font-weight: 800;
}

.hero-path-three {
  max-width: 46rem;
}

.section {
  padding: var(--space-16) var(--space-6);
  scroll-margin-top: 96px;
}

.section-light {
  border-block: 1px solid var(--color-line);
  background: var(--color-soft);
}

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

.section-dark {
  position: relative;
  overflow: hidden;
  background: var(--color-ink);
  color: var(--color-white);
}

.section-dark::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 54px 54px;
  opacity: 0.35;
  pointer-events: none;
}

.section-dark .section-inner {
  position: relative;
}

.section-dark .eyebrow,
.section-dark p {
  color: #bfe8fb;
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 1.1fr);
  gap: var(--space-12);
  align-items: start;
}

.plain-list,
.process-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.plain-list li {
  border-top: 1px solid var(--color-line);
  padding: var(--space-4) 0;
  font-size: 1.08rem;
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: var(--space-8);
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-line);
}

.focus-grid article {
  display: grid;
  align-content: start;
  gap: var(--space-3);
  min-width: 0;
  padding: var(--space-6);
  background: var(--color-white);
}

.focus-label {
  display: inline-flex;
  width: fit-content;
  border-left: 4px solid var(--color-primary);
  padding-left: var(--space-2);
  color: var(--color-primary-dark);
  font-size: 0.82rem;
  font-weight: 800;
}

.focus-grid p {
  margin-bottom: 0;
  color: var(--color-muted);
}

.focus-grid ul {
  display: grid;
  gap: var(--space-2);
  margin: var(--space-2) 0 0;
  padding: 0;
  list-style: none;
}

.focus-grid li {
  position: relative;
  padding-left: 1.1rem;
  color: var(--color-ink-soft);
}

.focus-grid li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--color-primary);
}

.check-options {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: var(--space-8);
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-line);
}

.check-option {
  display: grid;
  align-content: start;
  gap: var(--space-3);
  min-width: 0;
  padding: var(--space-6);
  background: var(--color-white);
}

.check-option-featured {
  background: linear-gradient(180deg, var(--color-blue-soft), var(--color-white));
}

.check-label {
  display: inline-flex;
  width: fit-content;
  border-left: 4px solid var(--color-primary);
  padding-left: var(--space-2);
  color: var(--color-primary-dark);
  font-size: 0.82rem;
  font-weight: 800;
}

.check-option h3 {
  margin-bottom: 0;
}

.check-option p {
  margin-bottom: 0;
  color: var(--color-muted);
}

.check-option ul {
  display: grid;
  gap: var(--space-2);
  margin: var(--space-2) 0 0;
  padding: 0;
  list-style: none;
}

.check-option li {
  position: relative;
  padding-left: 1.1rem;
  color: var(--color-ink-soft);
}

.check-option li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--color-primary);
}

.check-flow {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.2fr);
  gap: var(--space-8);
  align-items: start;
  margin-top: var(--space-6);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-6);
  background: var(--color-soft);
}

.check-flow h3 {
  margin-bottom: 0;
  font-size: 1.45rem;
}

.check-steps {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-line);
  list-style: none;
}

.check-steps li {
  display: grid;
  grid-template-columns: 3.25rem minmax(0, 1fr);
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--color-white);
}

.check-steps span {
  color: var(--color-primary-dark);
  font-weight: 800;
}

.about p,
.section-cta p {
  color: var(--color-muted);
}

.process-list li {
  display: grid;
  grid-template-columns: 3.25rem minmax(0, 1fr);
  gap: var(--space-4);
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  padding: var(--space-4) 0;
  font-size: 1.12rem;
}

.process-list span {
  color: #bfe8fb;
  font-weight: 800;
}

.case-study {
  display: grid;
  grid-template-columns: minmax(240px, 340px) minmax(0, 1fr);
  gap: var(--space-10);
  align-items: start;
}

.case-portrait {
  display: grid;
  gap: var(--space-3);
  margin: 0;
}

.case-portrait img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  object-position: center;
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.case-portrait figcaption {
  color: var(--color-muted);
  font-weight: 700;
}

.case-content {
  min-width: 0;
}

.case-logo-card {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: min(13rem, 100%);
  min-height: 5.2rem;
  margin: 0 0 var(--space-4);
  padding: var(--space-3);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-white);
}

.case-logo-card img {
  width: 100%;
  max-height: 4rem;
  object-fit: contain;
}

.case-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: var(--space-8);
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-line);
}

.case-columns article {
  display: grid;
  gap: var(--space-3);
  min-width: 0;
  padding: var(--space-5);
  background: var(--color-white);
}

.case-columns p {
  margin: 0;
  color: var(--color-muted);
}

.case-label {
  display: inline-flex;
  width: fit-content;
  border-left: 4px solid var(--color-primary);
  padding-left: var(--space-2);
  color: var(--color-primary-dark);
  font-size: 0.82rem;
  font-weight: 800;
}

.case-quote {
  margin: var(--space-6) 0 0;
  border-left: 4px solid var(--color-primary);
  padding: var(--space-4) 0 var(--space-4) var(--space-4);
  color: var(--color-ink-soft);
  font-weight: 800;
}

.reference-proof {
  display: grid;
  gap: var(--space-8);
}

.testimonial-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.testimonial-card,
.media-reference-card {
  min-width: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-soft);
}

.testimonial-card {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-5);
}

.testimonial-card__head {
  display: grid;
  grid-template-columns: 6.5rem minmax(0, 1fr);
  gap: var(--space-3);
  align-items: center;
}

.testimonial-card__logo {
  width: 6.5rem;
  height: 4rem;
  padding: 0.45rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  object-fit: contain;
}

.testimonial-card h3,
.media-reference-card h3 {
  margin: var(--space-2) 0 0;
}

.testimonial-card > p,
.media-reference-card p {
  margin: 0;
  color: var(--color-muted);
}

.testimonial-card figure {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
  margin: 0;
  padding: var(--space-4);
  border-radius: var(--radius-sm);
  background: var(--color-white);
}

.testimonial-card figure img {
  grid-row: span 2;
  width: 5rem;
  aspect-ratio: 1;
  border: 3px solid var(--color-white);
  border-radius: 999px;
  object-fit: cover;
  box-shadow: var(--shadow-soft);
}

.testimonial-card figure .testimonial-card__portrait--logo {
  border-radius: var(--radius-sm);
  object-fit: contain;
  padding: 0.35rem;
}

.testimonial-card blockquote {
  margin: 0;
  color: var(--color-ink-soft);
  font-weight: 800;
}

.testimonial-card figcaption {
  color: var(--color-muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.media-reference-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.media-reference-card {
  overflow: hidden;
}

.media-reference-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top center;
  border-bottom: 1px solid var(--color-line);
}

.media-reference-card div {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-5);
}

.section-about {
  background: linear-gradient(180deg, var(--color-white), var(--color-soft));
}

.about {
  display: grid;
  grid-template-columns: minmax(240px, 360px) minmax(0, 1fr);
  gap: var(--space-10);
  align-items: center;
  max-width: 1060px;
}

.about-portrait {
  position: relative;
  width: 100%;
  max-width: 360px;
  margin: 0;
}

.about-portrait::before {
  content: "";
  position: absolute;
  top: var(--space-4);
  bottom: var(--space-4);
  left: calc(var(--space-4) * -1);
  width: 4px;
  border-radius: 999px;
  background: var(--color-primary);
}

.about-portrait img {
  width: 100%;
  aspect-ratio: 5 / 6;
  object-fit: cover;
  object-position: center top;
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.about-copy {
  max-width: 660px;
}

.section-cta {
  background: linear-gradient(180deg, var(--color-blue-soft), var(--color-white));
}

.contact-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.contact-panel div {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-white);
  padding: var(--space-6);
}

.contact-panel p {
  margin-bottom: 0;
}

.legal-page h1 {
  margin-bottom: var(--space-6);
  font-size: 4rem;
  line-height: 1.02;
}

.legal-content {
  max-width: 820px;
}

.legal-content h2 {
  margin-top: var(--space-12);
  font-size: 2rem;
}

.legal-note {
  border-left: 4px solid var(--color-primary);
  margin-top: var(--space-8);
  padding-left: var(--space-4);
  color: var(--color-muted);
  font-weight: 700;
}

.site-footer {
  border-top: 1px solid var(--color-line);
  padding: var(--space-6);
  color: var(--color-muted);
  text-align: center;
}

.footer-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}

.footer-nav a {
  color: var(--color-ink);
  font-weight: 700;
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--color-primary-dark);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 920px) {
  .split,
  .about,
  .case-study {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 640px;
  }

  .hero::before {
    background: linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.98) 0%,
      rgba(255, 255, 255, 0.93) 56%,
      rgba(255, 255, 255, 0.62) 100%
    );
  }

  .hero-media img {
    object-position: 58% center;
  }

  .check-options,
  .check-flow {
    grid-template-columns: 1fr;
  }

  .focus-grid {
    grid-template-columns: 1fr;
  }

  .case-columns {
    grid-template-columns: 1fr;
  }

  .testimonial-grid,
  .media-reference-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact-panel {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 3.3rem;
  }

  .legal-page h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.35rem;
  }
}

@media (max-width: 640px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: var(--space-3) var(--space-4);
  }

  .nav-links {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, auto));
    width: 100%;
    gap: var(--space-3);
  }

  .nav-cta,
  .button {
    width: 100%;
  }

  .nav-cta {
    grid-column: 1 / -1;
  }

  .hero,
  .section {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

  .hero {
    min-height: 640px;
    padding-left: 0;
    padding-right: 0;
  }

  .hero::before {
    background: rgba(255, 255, 255, 0.93);
  }

  .hero-copy {
    padding: var(--space-10) var(--space-4);
  }

  .hero-media img {
    object-position: 63% center;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
    width: 100%;
  }

  .hero-path {
    gap: var(--space-4);
  }

  .hero-path-three {
    max-width: 100%;
  }

  .testimonial-grid,
  .media-reference-grid,
  .testimonial-card__head,
  .testimonial-card figure {
    grid-template-columns: 1fr;
  }

  .testimonial-card__logo {
    width: min(9rem, 100%);
  }

  .testimonial-card figure img {
    grid-row: auto;
  }

  h1 {
    font-size: 2.45rem;
    overflow-wrap: anywhere;
  }

  h2 {
    font-size: 2rem;
  }

  .lead,
  .section-lead {
    font-size: 1.05rem;
  }

  .hero-statement {
    font-size: 1.45rem;
  }

  .legal-page h1 {
    font-size: 2.35rem;
  }
}

@media (max-width: 420px) {
  .brand-link img {
    width: min(210px, 74vw);
  }

  h1 {
    font-size: 2.15rem;
  }
}

@media (max-width: 340px) {
  .nav-links,
  .hero-path {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .nav-links a,
  .button {
    transition: none;
  }
}