/* Grundlegende Stile & Typografie */
body {
    font-family: 'Open Sans', sans-serif;
    margin: 0;
    color: #333;
    background-color: #fff;
    line-height: 1.6;
}

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

a {
    color: #333;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #9ff41f;
}

img {
    max-width: 100%;
    height: auto;
}

h1, h2, h3 {
    font-family: 'Raleway', sans-serif;
    font-weight: 700;
}

sup {
    font-size: 0.6em;
    vertical-align: super;
}

/* Header & Navigation */
.site-header {
    background: #fff;
    padding: 15px 0;
    border-bottom: 1px solid #eee;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo img {
    max-height: 50px;
}

.main-navigation ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

.main-navigation ul li {
    position: relative;
    margin-left: 25px;
}

.main-navigation ul li a {
    font-family: 'Raleway', sans-serif;
    text-transform: lowercase;
    font-weight: 700;
    padding-bottom: 5px;
}

.main-navigation .sub-menu {
    display: none;
    position: absolute;
    background: #fff;
    list-style: none;
    padding: 10px;
    margin: 10px 0 0 0;
    border: 1px solid #eee;
    min-width: 150px;
    z-index: 100;
}

.main-navigation li:hover .sub-menu {
    display: block;
}

.main-navigation .sub-menu li {
    margin: 0;
}

.main-navigation .sub-menu a {
    display: block;
    padding: 5px 10px;
}

.header-extras {
    display: flex;
    align-items: center;
}

.mail-icon img {
    height: 24px;
    margin-right: 15px;
}

/* Hero-Sektion (Banner) */
.hero img {
    width: 100%;
    display: block;
}

/* Intro-Sektion */
.intro-section {
    padding: 60px 20px;
    text-align: center;
}

.intro-section h2 {
    font-size: 2em;
    margin-bottom: 20px;
}

.intro-section p {
    font-family: 'Raleway', sans-serif;
    font-size: 1.1em;
    max-width: 800px;
    margin: 0 auto;
}

/* Grid-Layout für die Kacheln */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    padding: 20px;
}

.grid-item {
    position: relative;
    overflow: hidden;
}

.grid-item img {
    display: block;
    width: 100%;
    transition: transform 0.3s ease;
}

.grid-item:hover img {
    transform: scale(1.1);
}

.grid-item .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(159, 244, 31, 0.85); /* Lime-Grün mit leichter Transparenz */
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.grid-item:hover .overlay {
    opacity: 1;
}

.grid-item .overlay h3 {
    color: #333;
    font-size: 1.5em;
    margin: 0;
    text-transform: lowercase;
}

/* Footer */
.site-footer {
    text-align: center;
    padding: 40px 20px;
    border-top: 1px solid #eee;
    margin-top: 40px;
}