:root {
  --color-bg: #ffffff;
  --color-text: #1f2937; /* Gray 800 */
  --color-text-secondary: #6b7280; /* Gray 500 */
  --color-divider: #e5e7eb; /* Gray 200 */
  --color-primary: #1565c0; /* Blue 800 */
  --color-secondary: #00c853; /* Green A700 */

  --radius: 12px;
  --shadow-0: none;
  --focus: 2px solid rgba(21, 101, 192, 0.35);

  --container-max: 1200px;
  --space-1: 8px;
  --space-2: 12px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;

  /* Seriöser Business/Tech-Hintergrund (verstärkt) */
  --bg-base: #f3f6fb; /* etwas kräftiger als zuvor */
  --bg-tech-1: rgba(37, 99, 235, 0.22); /* blue-600 @22% */
  --bg-tech-2: rgba(14, 165, 233, 0.18); /* sky-500 @18% */
  --bg-tech-3: rgba(15, 23, 42, 0.12);   /* slate-900 @12% */
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Roboto, system-ui, -apple-system, Segoe UI, Arial, sans-serif;
  color: var(--color-text);
  background:
    radial-gradient(1200px 650px at -10% -25%, var(--bg-tech-1) 0%, rgba(0,0,0,0) 70%),
    radial-gradient(1100px 550px at 115% -10%, var(--bg-tech-2) 0%, rgba(0,0,0,0) 65%),
    radial-gradient(900px 480px at 50% 120%, var(--bg-tech-3) 0%, rgba(0,0,0,0) 65%),
    linear-gradient(180deg, #ffffff 0%, var(--bg-base) 60%, #ffffff 100%);
  line-height: 1.6;
}
img, svg { display: block; max-width: 100%; height: auto; }
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-divider);
}
.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: var(--space-4);
}
.logo {
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}
.main-nav ul {
  display: flex;
  gap: var(--space-5);
  list-style: none;
  margin: 0;
  padding: 0;
}
.main-nav a { color: var(--color-text); text-decoration: none; font-weight: 500; }
.main-nav a:hover { text-decoration: underline; text-underline-offset: 2px; }

.header-cta { display: inline-flex; }

.nav-toggle {
  display: none;
  border: 0;
  background: transparent;
  padding: var(--space-2);
  border-radius: 8px;
}
.nav-toggle:focus { outline: var(--focus); }

/* Hero */
.hero { padding: var(--space-7) 0; }
.hero-content { max-width: 900px; }
.hero h1 {
  margin: 0 0 var(--space-3) 0;
  line-height: 1.2;
  font-weight: 700;
  font-size: clamp(2rem, 2.5vw + 1rem, 3.2rem);
}
.hero p {
  margin: 0 0 var(--space-5) 0;
  color: var(--color-text-secondary);
  font-size: 1.125rem;
}
.actions { display: flex; gap: var(--space-3); flex-wrap: wrap; }

/* About */
.about { padding: var(--space-6) 0; border-top: 1px solid var(--color-divider); }
.about h2 { margin: 0 0 var(--space-3) 0; font-size: 1.75rem; }
.about-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  padding-left: 1rem;
}

/* Services */
.services { padding: var(--space-6) 0; border-top: 1px solid var(--color-divider); }
.services h2 { margin: 0 0 var(--space-4) 0; font-size: 1.75rem; }
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}
.card {
  border: 1px solid var(--color-divider);
  border-radius: var(--radius);
  padding: var(--space-5);
  background: var(--color-bg);
}
.card .material-symbols-outlined { font-size: 32px; color: var(--color-primary); }
.card h3 { margin: var(--space-3) 0 var(--space-2) 0; font-size: 1.25rem; }
.card p { margin: 0; color: var(--color-text-secondary); }

/* Footer / Kontakt */
.site-footer { padding: var(--space-6) 0; border-top: 1px solid var(--color-divider); }
.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  align-items: start;
}
.footer-info address { font-style: normal; margin-bottom: var(--space-3); }
.footer-info a { color: var(--color-primary); text-decoration: none; }
.footer-info a:hover { text-decoration: underline; }

.map-section { margin-top: var(--space-5); }
.map-container {
  width: 100%;
  height: 320px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-divider);
  background: #f5f5f5;
}

.contact-form { display: grid; gap: var(--space-3); }
.form-field { display: grid; gap: 6px; }
label { font-weight: 500; }
input, textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-divider);
  border-radius: 10px;
  background: #fff;
  color: var(--color-text);
  font: inherit;
}
input:focus, textarea:focus { outline: var(--focus); border-color: var(--color-primary); }
.privacy-note { margin: var(--space-2) 0 0 0; font-size: 0.9rem; color: var(--color-text-secondary); }
.form-status { margin: var(--space-3) 0 0 0; font-size: 0.95rem; color: var(--color-text-secondary); }
.form-status.success { color: #1b5e20; }
.form-status.error { color: #b71c1c; }
.form-status.info { color: var(--color-primary); }

.legal-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
}
.footer-nav { display: flex; gap: var(--space-4); }
.footer-nav a { color: var(--color-text-secondary); text-decoration: none; }
.footer-nav a:hover { color: var(--color-text); text-decoration: underline; }

/* Buttons */
.btn {
  --btn-bg: transparent;
  --btn-color: var(--color-text);
  --btn-border: 1px solid var(--color-divider);

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  border: var(--btn-border);
  background: var(--btn-bg);
  color: var(--btn-color);
  text-decoration: none;
  font-weight: 600;
}
.btn:focus { outline: var(--focus); }
.btn-primary {
  --btn-bg: var(--color-primary);
  --btn-color: #fff;
  --btn-border: 1px solid var(--color-primary);
}
.btn-secondary {
  --btn-bg: transparent;
  --btn-color: var(--color-primary);
  --btn-border: 1px solid var(--color-primary);
}

/* Responsive */
@media (max-width: 904px) {
  .cards { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .main-nav { display: none; }
  .header-cta { display: none; }
  .nav-toggle { display: inline-flex; }

  .nav-open .main-nav { display: block; }
  .main-nav ul {
    position: absolute;
    top: 72px;
    right: 0;
    background: #fff;
    border: 1px solid var(--color-divider);
    border-radius: var(--radius);
    padding: var(--space-3);
    margin: var(--space-2);
    flex-direction: column;
    gap: var(--space-2);
    min-width: 200px;
  }
  .cards { grid-template-columns: 1fr; }
  .hero { padding: var(--space-6) 0; }
}