/* Grundlegende Stile */
:root {
    --primary-color: #007bff; /* Blau */
    --secondary-color: #6c757d; /* Grau */
    --text-color: #333;
    --light-bg: #f8f9fa;
    --dark-bg: #343a40;
    --white: #fff;
    --font-family: 'Inter', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

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

section {
    padding: 80px 0;
}

h1, h2, h3 {
    margin-bottom: 20px;
    font-weight: 700;
    color: var(--dark-bg);
}

h1 { font-size: 3em; }
h2 { font-size: 2.5em;
     margin-top: 20px; }
h3 { font-size: 1.8em; }

p {
    margin-bottom: 15px;
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.btn {
    display: inline-block;
    padding: 12px 25px;
    border-radius: 5px;
    font-weight: 600;
    transition: background-color 0.3s ease;
}

.btn.primary {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
}

.btn.primary:hover {
    background-color: #0056b3;
    text-decoration: none;
}

/* Header */
.header {
    background-color: var(--white);
    padding: 20px 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    font-size: 1.8em;
    font-weight: 700;
    color: var(--dark-bg);
}

.nav-list {
    list-style: none;
    display: flex;
}

.nav-list li {
    margin-left: 30px;
}

.nav-list a {
    font-weight: 600;
    color: var(--dark-bg);
    transition: color 0.3s ease;
}

.nav-list a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.mobile-nav-toggle {
    display: none; /* Standardmäßig ausgeblendet auf Desktop */
    background: none;
    border: none;
    font-size: 2em;
    cursor: pointer;
    color: var(--dark-bg);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Hero Sektion */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('https://via.placeholder.com/1920x600/007bff/ffffff?text=Dein+IT-Dienstleister+Hero') no-repeat center center/cover;
    color: var(--white);
    text-align: center;
    padding: 150px 0;
}

.hero h1 {
    font-size: 4em;
    margin-bottom: 20px;
    color: var(--white);
}

.hero p {
    font-size: 1.5em;
    margin-bottom: 40px;
    color: var(--white);
}

/* Services Sektion */
.services {
    background-color: var(--light-bg);
    text-align: center;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.service-item {
    background-color: var(--white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    text-align: left;
    transition: transform 0.3s ease;
}

.service-item:hover {
    transform: translateY(-5px);
}

.service-item h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

/* About Sektion */
.about {
    background-color: var(--white);
    text-align: center;
}

/* References Sektion */
.references {
    background-color: var(--light-bg);
    text-align: center;
}

.reference-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.reference-item {
    background-color: var(--white);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

.reference-item img {
    max-width: 100px;
    margin-bottom: 15px;
}

/* Contact Sektion */
.contact {
    background-color: var(--primary-color);
    color: var(--white);
    text-align: center;
}

.contact h2 {
    color: var(--white);
}

.contact p {
    font-size: 1.1em;
    margin-bottom: 30px;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--white);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    text-align: left;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark-bg);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: var(--font-family);
    font-size: 1em;
}

.form-group textarea {
    resize: vertical;
}

.contact-form .btn {
    width: 100%;
    padding: 15px;
    font-size: 1.1em;
}

/* Footer */
.footer {
    background-color: var(--dark-bg);
    color: var(--white);
    padding: 40px 0;
    text-align: center;
    font-size: 0.9em;
}

.footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer-links {
    margin-top: 15px;
}

.footer-links a {
    color: var(--white);
    margin: 0 10px;
}

.footer-links a:hover {
    text-decoration: underline;
}

/* =========================================== */
/* Responsivität mit Media Queries             */
/* =========================================== */

/* Tablet-Ansicht (z.B. 768px bis 1024px) */
@media (max-width: 1024px) {
    .container {
        padding: 0 15px;
    }

    h1 { font-size: 3.5em; }
    h2 { font-size: 2em; }
    h3 { font-size: 1.6em; }

    .hero {
        padding: 120px 0;
    }

    .hero h1 {
        font-size: 3em;
    }

    .hero p {
        font-size: 1.3em;
    }

    .service-grid,
    .reference-grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }
}

/* Mobile-Ansicht (z.B. unter 768px) */
@media (max-width: 768px) {
    .header .container {
        flex-wrap: wrap; /* Ermöglicht Umbruch auf kleineren Bildschirmen */
        justify-content: center;
    }

    .logo {
        margin-bottom: 15px;
    }

    .nav {
        display: none; /* Navigationsmenü standardmäßig verstecken */
        width: 100%;
        order: 3; /* Nach unten verschieben */
        text-align: center;
        background-color: var(--white);
        box-shadow: 0 2px 5px rgba(0,0,0,0.05);
        padding: 10px 0;
    }

    .nav[data-visible="true"] {
        display: block; /* Zeigen, wenn JavaScript es umschaltet */
    }

    .nav-list {
        flex-direction: column;
        align-items: center;
    }

    .nav-list li {
        margin: 10px 0;
    }

    .mobile-nav-toggle {
        display: block; /* Hamburger-Menü anzeigen */
        position: absolute;
        right: 20px;
        top: 20px;
    }

    .hero {
        padding: 80px 0;
    }

    .hero h1 {
        font-size: 2.5em;
    }

    .hero p {
        font-size: 1.1em;
    }

    section {
        padding: 60px 0;
    }

    h1 { font-size: 2.5em; }
    h2 { font-size: 1.8em; }
    h3 { font-size: 1.4em; }

    .service-grid,
    .reference-grid {
        grid-template-columns: 1fr; /* Eine Spalte auf Mobilgeräten */
    }

    .contact-form {
        padding: 25px;
    }

    .footer .container {
        flex-direction: column;
    }

    .footer-links {
        margin-top: 15px;
    }

    .footer-links a {
        display: block;
        margin: 5px 0;
    }
}

/* Kleinere Mobilgeräte (z.B. unter 480px) */
@media (max-width: 480px) {
    .hero h1 {
        font-size: 2em;
    }

    .hero p {
        font-size: 1em;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.9em;
    }

    .logo {
        font-size: 1.5em;
    }
}