/* ===========================
   Basis / Theme
   =========================== */
:root {
  --brand: #0066cc;   /* Blau: Vertrauen */
  --accent: #00b894;  /* Grün: Energie */
  --dark: #1f2937;
  --muted: #f5f7fa;
  --radius: 12px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: Arial, Helvetica, sans-serif;
  margin: 0;
  line-height: 1.6;
  background: var(--muted);
  color: #333;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

section { padding: 40px 0; scroll-margin-top: 100px; } /* Anker springen nicht unter Header */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ===========================
   Header / Navigation
   =========================== */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  color: #fff;
  padding: 20px 0;
  text-align: center;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}
header h1 { margin: 0; font-size: 1.8rem; }
nav ul { list-style: none; padding: 0; margin: 10px 0 0; }
nav ul li { display: inline-block; margin: 0 14px; }
nav ul li a { color: #fff; font-weight: bold; text-decoration: none; }
nav ul li a:hover { color: #ffeaa7; }

/* ===========================
   Typografie / Überschriften
   =========================== */
main h2 { color: var(--brand); margin: 0 0 10px; }
h3 { color: var(--brand); margin-top: 0; }

/* ===========================
   Hero
   =========================== */
.hero {
  background: linear-gradient(135deg, rgba(0,102,204,.08), rgba(0,184,148,.08));
  text-align: center;
  padding: 48px 0;
}
.hero h2 { margin: 0 0 8px; font-size: 1.8rem; color: var(--dark); }
.hero h2 span { color: var(--brand); }
.hero p { max-width: 720px; margin: 0 auto; }
.hero .cta {
  margin-top: 16px;
  display: flex; gap: 12px; justify-content: center; flex-wrap: wrap;
}
.badges {
  display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-top: 12px;
}
.badge {
  background: #eef2f7;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: .9rem;
}

/* ===========================
   Cards (Angebot)
   =========================== */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 16px;
}
.card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
  padding: 16px;
}

/* ===========================
   Steps („So läuft’s ab“)
   =========================== */
.steps { counter-reset: step; display: grid; gap: 12px; margin-top: 12px; }
.step {
  background: #fff;
  border-left: 4px solid var(--accent);
  padding: 12px;
  border-radius: 8px;
}
.step h4 { margin: 0 0 6px; }
.step h4::before {
  counter-increment: step;
  content: counter(step) ". ";
  color: var(--accent);
  font-weight: 700;
}

/* ===========================
   FAQ
   =========================== */
details.faq {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: var(--radius);
  padding: 12px 14px;
}
details.faq + details.faq { margin-top: 8px; }
details.faq summary { font-weight: 600; cursor: pointer; }

/* ===========================
   Buttons
   =========================== */
.btn {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  transition: transform .05s ease-in, opacity .2s ease;
}
.btn:hover { opacity: .9; text-decoration: none; }
.btn:active { transform: translateY(1px); }

.btn-secondary {
  display: inline-block;
  margin-top: 10px;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
}
.btn-secondary:hover { opacity: .9; text-decoration: none; }

.btn-outline {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 10px;
  border: 2px solid var(--brand);
  background: transparent;
  color: var(--brand);
  font-weight: 700;
}
.btn-outline:hover { background: var(--brand); color: #fff; text-decoration: none; }

/* ===========================
   Rechner-Formular
   =========================== */
#rechner .grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 16px 0;
}

#rechner .field label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
}

#rechner .field input,
#rechner .field select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #cfd8dc;
  border-radius: 8px;
  font-size: 1rem;
  background: #fff;
}

#ergebnis { margin-top: 18px; }
#ergebnis .hint { font-size: .9rem; color: #555; }
#ergebnis.pos { border-left: 6px solid var(--accent); }
#ergebnis.neg { border-left: 6px solid #cc3b3b; }

/* ===========================
   Footer
   =========================== */
footer {
  text-align: center;
  padding: 15px;
  background: #333;
  color: #fff;
  margin-top: 30px;
  font-size: .95rem;
}
footer a { color: #fff; text-decoration: underline; }
footer a:hover { opacity: .9; }

/* ===========================
   Kleinigkeiten / Accessability
   =========================== */
:focus-visible { outline: 2px dashed var(--brand); outline-offset: 2px; }
img { max-width: 100%; height: auto; display: block; }
ul { margin: 0; padding-left: 20px; }