/* --- CSS Variablen für ein durchgehendes Design --- */
:root {
    --color-primary: #005A9C;     /* Vertrauensvolles Ozeanblau */
    --color-primary-light: #3388CC; /* Helleres Blau für Akzente */
    --color-accent: #7CB342;      /* Frisches "Öko"-Grün */
    --color-bg-light: #F4F7F6;    /* Sehr helles Graugrün als Hintergrund */
    --color-text-dark: #2C3E50;   /* Dunkles Blaugrau für Text (weicher als reines Schwarz) */
    --color-text-light: #607D8B;  /* Hellerer Text für Untertitel */
    --color-white: #FFFFFF;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 15px 40px rgba(0, 90, 156, 0.15);
}

/* --- Grundlegende Einstellungen (Reset) --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--color-bg-light);
    color: var(--color-text-dark);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: var(--color-primary);
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-accent);
}

/* --- Buttons --- */
.btn {
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-white);
}

.btn-primary:hover {
    background-color: #689F38; /* Etwas dunkleres Grün beim Hover */
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

.btn-outline:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

/* --- Header & Navigation --- */
.main-header {
    background-color: var(--color-white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
}

.logo span {
    color: var(--color-accent);
}

.main-nav ul {
    list-style: none;
    display: flex;
    gap: 30px;
}

.main-nav a {
    color: var(--color-text-dark);
    font-weight: 600;
}

.main-nav a:hover {
    color: var(--color-primary);
}

/* --- Hero Bereich --- */
.hero {
    /* Ein frischer Farbverlauf für den Hintergrund */
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

/* Tarifbox im Hero-Bereich */
.tariff-box {
    background-color: var(--color-white);
    color: var(--color-text-dark);
    padding: 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    max-width: 800px;
    margin: 0 auto;
}

.tariff-box h3 {
    margin-bottom: 20px;
    color: var(--color-primary);
}

.tariff-form {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap; /* Bricht um auf kleinen Bildschirmen */
}

.tariff-form input {
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: var(--radius-sm);
    flex: 1;
    min-width: 200px;
    font-size: 1rem;
}

.tariff-form input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 90, 156, 0.1);
}

/* --- Services (Kacheln) --- */
.services {
    padding: 80px 20px;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: 10px;
}

.section-header p {
    color: var(--color-text-light);
    font-size: 1.1rem;
}

.service-grid {
    display: grid;
    /* Responsive Grid: Passt sich automatisch der Bildschirmbreite an */
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.card {
    background-color: var(--color-white);
    padding: 40px 30px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-bottom: 4px solid transparent;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-bottom: 4px solid var(--color-accent);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.card h3 {
    color: var(--color-primary);
    margin-bottom: 15px;
    font-size: 1.4rem;
}

.card p {
    color: var(--color-text-light);
    margin-bottom: 25px;
}

.card-link {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 1px;
}

/* --- Info Banner --- */
.info-banner {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 60px 20px;
    text-align: center;
    margin-top: 40px;
}

.banner-content h2 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.banner-content p {
    font-size: 1.1rem;
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.9;
}

/* --- Footer --- */
.main-footer {
    background-color: var(--color-text-dark);
    color: var(--color-white);
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    color: var(--color-accent);
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-col p {
    margin-bottom: 10px;
    color: #cbd5e1;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul a {
    color: #cbd5e1;
}

.footer-col ul a:hover {
    color: var(--color-accent);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: #94a3b8;
    font-size: 0.9rem;
}

/* --- Responsive Design Anpassungen --- */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        height: auto;
        padding: 20px 0;
        gap: 15px;
    }
    
    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .tariff-form {
        flex-direction: column;
    }
}