@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;800&display=swap');

:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1e40af;
  --color-bg: #f1f5f9;
  --color-bg-glass: rgba(255,255,255,0.80);
  --color-text: #1e293b;
  --color-muted: #64748b;
}

body {
  font-family: 'Inter', Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  margin: 0;
  min-height: 100vh;
  font-size: 1.07rem;
  letter-spacing: -.01em;
  line-height: 1.65;
}

/* Glass-Header wie Cube */
.header-glass {
  background: var(--color-bg-glass);
  box-shadow: 0 4px 32px rgba(30, 64, 175, 0.05);
  backdrop-filter: blur(12px);
}

.bg-overlay {
  background: var(--color-bg-glass);
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 32px rgba(30, 64, 175, 0.06);
}

/* Headings */
h1, h2, h3, h4 {
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--color-primary-dark);
  margin-bottom: .8em;
}
h1 { font-size: 2.7rem; }
h2 { font-size: 2.0rem; }
h3 { font-size: 1.35rem; }

/* Navbar */
.navbar {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}
.navbar a {
  color: var(--color-text);
  font-weight: 600;
  transition: color 0.2s;
  position: relative;
  padding: 0.25rem 0;
}
.navbar a:hover, .navbar a.active {
  color: var(--color-primary);
}

/* Primary CTA Button */
.cta-primary {
  background: linear-gradient(90deg, #2563eb 0%, #1e40af 100%);
  color: #fff;
  font-weight: 700;
  border-radius: 1rem;
  padding: 0.85rem 2.1rem;
  box-shadow: 0 8px 24px rgba(37,99,235,0.10);
  font-size: 1.15rem;
  letter-spacing: -.01em;
  transition: background 0.2s, transform 0.1s;
}
.cta-primary:hover {
  background: linear-gradient(90deg, #1e40af 0%, #2563eb 100%);
  transform: translateY(-2px) scale(1.03);
}

/* Card/Section Glass */
.card {
  background: var(--color-bg-glass);
  border-radius: 1.25rem;
  box-shadow: 0 8px 32px rgba(37,99,235,0.09);
  padding: 2rem;
}

/* Footer */
footer {
  background: #18181b;
  color: #e0e7ef;
  padding: 2rem 0 1.5rem;
  font-size: .99rem;
}
footer a { color: #e0e7ef; opacity: .84; transition: opacity .2s; }
footer a:hover { opacity: 1; color: #fff; }

/* Form & Inputs */
input, textarea {
  background: #fff;
  border: 1.5px solid #cbd5e1;
  border-radius: .7rem;
  padding: .7rem 1.1rem;
  font-size: 1rem;
  transition: border .2s;
  margin-bottom: 0.6rem;
}
input:focus, textarea:focus {
  border-color: var(--color-primary);
  outline: none;
}
button, .btn {
  border-radius: 1rem;
  padding: .8rem 2rem;
  font-weight: 700;
  font-size: 1.09rem;
  background: var(--color-primary);
  color: #fff;
  border: none;
  transition: background .2s, box-shadow .2s;
  box-shadow: 0 4px 16px rgba(37,99,235,0.09);
}
button:hover, .btn:hover {
  background: var(--color-primary-dark);
}

/* Sections */
section {
  margin-bottom: 2rem;
  margin-top: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.4rem; }
  .navbar { gap: 1rem; }
  .card, .bg-overlay { padding: 1.1rem; }
  section { margin-bottom: 1rem; }
}