/* =========================
   Grundlegendes Reset
========================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

body {
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

/* =========================
   Container
========================= */
.container {
    width: 90%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px 0;
}

/* =========================
   Header
========================= */
header {
    background-color: #f9f9f9;
    color: #fff;
    padding: 40px 0;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

header p {
    font-size: 1.2rem;
}

/* =========================
   Sektionen
========================= */
section {
    background-color: #fff;
    padding: 30px 20px;
    margin-bottom: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
}

section h2 {
    color: #004080;
    margin-bottom: 15px;
    font-size: 1.8rem;
}

section h3 {
    color: #0066cc;
    margin-top: 15px;
    margin-bottom: 10px;
}

/* Listen */
ul, ol {
    margin-left: 20px;
    margin-bottom: 15px;
}

li {
    margin-bottom: 8px;
}

/* =========================
   Formulare / ROI Rechner
========================= */
form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 15px;
}

input[type="number"] {
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #ccc;
    font-size: 1rem;
}

button {
    background-color: #004080;
    color: #fff;
    padding: 12px 20px;
    font-size: 1rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #0066cc;
}

.roi-result {
    margin-top: 15px;
    padding: 15px;
    background-color: #e6f0ff;
    border-left: 5px solid #004080;
    border-radius: 5px;
}

/* =========================
   Call to Action
========================= */
#cta {
    text-align: center;
}

#cta p {
    font-size: 1.2rem;
    margin-bottom: 15px;
}

.btn {
    display: inline-block;
    background-color: #0066cc;
    color: #fff;
    padding: 12px 25px;
    text-decoration: none;
    font-weight: bold;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background-color: #004080;
}

/* =========================
   Footer
========================= */
footer {
    background-color: #004080;
    color: #fff;
    padding: 20px 0;
    text-align: center;
    margin-top: 30px;
}

footer p {
    font-size: 0.9rem;
}

/* =========================
   Responsiveness
========================= */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    section h2 {
        font-size: 1.5rem;
    }
}