:root {
  --weiss: #ffffff;
  --sand-beige: #eee5d9;
  --caramel-beige: #d1b589;
  --gummi-grau: #282727;
  --tinten-schwarz: #000000;
  --navy-blau: #232d52;
  --himmel-blau: #0076be;
  --max-width: 960px;
  --radius: 8px;
  --ff-sans: "Articulat CF", "Inter", "Segoe UI", Roboto, Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
  font-family: var(--ff-sans);
  color: var(--gummi-grau);
  background-color: var(--weiss);
  line-height: 1.45;
}

body {
  min-height: 100vh;
}

main,
.container {
  width: min(94%, var(--max-width));
  margin: 0 auto;
  padding: 1.25rem 0 2rem;
}

h1 {
  margin: 0;
  color: var(--himmel-blau);
  font-weight: 900;
  font-size: 1.6rem;
}

form,
.summary {
  background: var(--weiss);
  border-radius: var(--radius);
  padding: 1rem;
  border: 1px solid rgba(0, 0, 0, 0.05);
  box-shadow: 0 6px 18px rgba(35, 45, 82, 0.06);
}

fieldset {
  border: 0;
  padding: 0;
  margin: 0 0 1rem;
}

legend {
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--navy-blau);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 0.9rem;
}

label {
  font-weight: 600;
}

input,
select,
textarea {
  font: inherit;
  font-size: 1rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid rgba(40, 39, 39, 0.12);
  border-radius: 6px;
  background: #ffffff;
  color: var(--gummi-grau);
  width: 100%;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--himmel-blau);
  box-shadow: 0 0 0 3px rgba(0, 118, 190, 0.12);
  outline: none;
}

button,
.button-secondary {
  display: inline-block;
  padding: 0.65rem 1rem;
  border-radius: 6px;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

button {
  border: 0;
  color: #ffffff;
  background: linear-gradient(180deg, var(--himmel-blau), var(--himmel-blau));
}

.button-secondary {
  color: var(--navy-blau);
  border: 1px solid rgba(35, 45, 82, 0.12);
  background: transparent;
}

.form-errors {
  background: #ffe8e8;
  border: 1px solid rgba(176, 0, 32, 0.2);
  color: #b00020;
  padding: 0.9rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
}

.form-errors ul {
  margin: 0;
  padding-left: 1.25rem;
}

.field-error {
  display: block;
  min-height: 1.1em;
  color: #b00020;
  font-size: 0.9rem;
}

.is-invalid {
  border-color: #b00020 !important;
  background: #fff7f7;
}

.summary dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem 1.5rem;
  margin: 0;
}

.summary dt {
  font-weight: 700;
}

.summary dd {
  margin: 0;
}

.form-group-checkbox {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.checkbox-inline {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.checkbox-inline input {
  width: auto;
  flex: 0 0 auto;
  margin: 0;
}

.checkbox-inline label {
  width: auto;
  margin: 0;
  text-align: left;
}

.m-bottom {
  margin-bottom: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--navy-blau);
}

.site-header-inner {
  width: min(94%, var(--max-width));
  margin: 0 auto;
  padding: 1rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.logo-link {
  display: inline-block;
  margin: 0;
  padding: 0;
}

.logo {
  display: block;
  height: 20px;
  width: auto;
}

.hero {
  position: relative;
  width: 100%;
  height: 320px;
  overflow: hidden;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.25);
  color: #fff;
  text-align: center;
  padding: 1rem;
}

.hero-overlay h1 {
  margin: 0;
  color: #fff;
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
}

.site-footer {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(0, 0, 0, 0.04);
  color: rgba(40, 39, 39, 0.65);
  font-size: 0.9rem;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  color: var(--weiss);
  text-decoration: none;
  font-weight: 600;
}

.main-nav a:hover,
.main-nav a:focus {
  color: var(--sand-beige);
}

.hero-content,
.landing-section,
.landing-cards {
  width: min(94%, var(--max-width));
  margin: 0 auto;
}

.landing-intro {
  padding: 2.5rem 0 1rem;
}

.landing-intro p {
  max-width: 65ch;
}

.landing-cards {
  display: grid;
  gap: 24px;
  padding: 1rem 0 2rem;
}

.landing-card {
  background: var(--weiss);
  border-radius: var(--radius);
  padding: 1rem;
  border: 1px solid rgba(0, 0, 0, 0.05);
  box-shadow: 0 6px 18px rgba(35, 45, 82, 0.06);
}

.cta-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.button-primary {
  display: inline-block;
  padding: 0.65rem 1rem;
  border-radius: 6px;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  border: 0;
  color: var(--weiss);
  background: var(--himmel-blau);
}

@media (min-width: 768px) {
  .form-group {
    flex-direction: row;
    align-items: center;
  }

  label {
    width: 220px;
    text-align: right;
  }

  input,
  select,
  textarea {
    flex: 1;
  }

  h1 {
    font-size: 2rem;
  }

  .landing-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .logo {
    height: 40px;
  }

  .hero {
    height: 240px;
  }

  .form-group {
    flex-direction: column;
    align-items: stretch;
  }

  label {
    width: auto;
    text-align: left;
  }

  .site-header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .main-nav ul {
    flex-wrap: wrap;
    gap: 0.75rem;
  }
}