:root {
    /* Light Mode Colors */
    --bg-color: #f4f4f5;
    --text-color: #18181b;
    --card-bg: #ffffff;
    --accent-color: #3b82f6;
    --nav-bg: rgba(244, 244, 245, 0.8);
}

[data-theme="dark"] {
    /* Dark Mode Colors (Modern, not pitch black) */
    --bg-color: #18181b;
    --text-color: #e4e4e7;
    --card-bg: #27272a;
    --accent-color: #60a5fa;
    --nav-bg: rgba(24, 24, 27, 0.8);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.4s ease, color 0.4s ease;
    line-height: 1.6;
}

nav {
    display: flex;
    justify-content: space-between;
    padding: 1.5rem 5%;
    position: sticky;
    top: 0;
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
    z-index: 100;
}

.logo {
    font-weight: bold;
    font-size: 1.2rem;
    letter-spacing: 2px;
}

button {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    font-size: 1rem;
    margin-left: 15px;
    transition: transform 0.2s;
}

button:hover {
    transform: scale(1.1);
}

/* 3D Intro Animation */
.intro-3d {
    animation: fadeUp3D 1.2s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
    transform-origin: center bottom;
    opacity: 0;
}

@keyframes fadeUp3D {
    0% {
        opacity: 0;
        transform: translateY(50px) rotateX(-20deg) scale(0.9);
    }
    100% {
        opacity: 1;
        transform: translateY(0) rotateX(0) scale(1);
    }
}

.hero {
    height: 70vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 5%;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, var(--text-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

main {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 5%;
}

section {
    margin-bottom: 5rem;
}

h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--accent-color);
    display: inline-block;
    padding-bottom: 0.5rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    perspective: 1000px; /* Nötig für 3D Card Hover */
}

/* 3D Card Hover Effect - Jetzt als Link optimiert */
.card-3d {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    cursor: pointer;
    
    /* Diese drei Zeilen reparieren den blauen Link-Text */
    text-decoration: none;
    color: inherit;
    display: block;
}

[data-theme="dark"] .card-3d {
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

.card-3d:hover {
    transform: translateY(-10px) rotateX(5deg) rotateY(-5deg);
    box-shadow: 10px 15px 25px rgba(0,0,0,0.1);
}

[data-theme="dark"] .card-3d:hover {
    box-shadow: 10px 15px 25px rgba(0,0,0,0.5);
}

.card-3d h3 {
    margin-bottom: 1rem;
    color: var(--accent-color);
}