/* --- CSS VARIABLES & RESET --- */
      :root {
        --bg-color: #050505;
        --card-bg: #0f0f0f;
        --border-color: #27272a;
        --text-main: #e4e4e7;
        --text-muted: #a1a1aa;
        --accent-primary: #10b981; /* Changed to a vibrant green */
        --accent-secondary: #a855f7; /* Purple gradient hint, kept original */
        --font-main: "Inter", sans-serif;
        --font-mono: "JetBrains Mono", monospace;
      }

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

      html {
        scroll-behavior: smooth; /* Damit das Scrollen weich ist */
      }

      body {
        background-color: var(--bg-color);
        color: var(--text-main);
        font-family: var(--font-main);
        line-height: 1.6;
        overflow-x: hidden;
      }

      /* --- BACKGROUND GRID EFFECT (Wie im Screenshot) --- */
      .grid-bg {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: -1;
        background-image: linear-gradient(
            to right,
            #1a1a1a 1px,
            transparent 1px
          ),
          linear-gradient(to bottom, #1a1a1a 1px, transparent 1px);
        background-size: 50px 50px;
        mask-image: radial-gradient(
          ellipse at center,
          black 40%,
          transparent 80%
        );
        -webkit-mask-image: radial-gradient(
          ellipse at center,
          black 40%,
          transparent 80%
        );
        opacity: 0.6;
      }

      /* NEU: HEADER STYLING FÜR DEN BUTTON */
      .header-nav {
        position: fixed; /* Fixiert, damit er immer sichtbar ist */
        top: 0;
        left: 0;
        width: 100%;
        padding: 15px 0;
        z-index: 100;
        /* Leicht transparenter Hintergrund, damit man den Grid-Effekt noch sieht */
        background-color: rgba(5, 5, 5, 0.8);
        backdrop-filter: blur(5px);
        border-bottom: 1px solid var(--border-color);
      }

      .header-content {
        max-width: 1100px;
        margin: 0 auto;
        padding: 0 20px;
        display: flex;
        justify-content: flex-end; /* Button nach rechts schieben */
        align-items: center;
      }

      /* --- LAYOUT --- */
      .container {
        max-width: 1100px;
        margin: 0 auto;
        padding: 0 20px;
        /* NEU: Zusätzlicher Top-Padding, um Platz für den Header zu schaffen */
        padding-top: 70px;
      }

      section {
        margin-bottom: 100px;
        padding-top: 60px;
      }

      /* --- TYPOGRAPHY --- */
      h1,
      h2,
      h3 {
        font-family: var(--font-mono);
        color: #fff;
      }

      h2 {
        font-size: 1.8rem;
        margin-bottom: 2rem;
        display: flex;
        align-items: center;
        gap: 10px;
      }

      h2::before {
        content: "";
        display: inline-block;
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: var(--text-main);
        box-shadow: 0 0 10px var(--text-main);
      }

      p {
        color: var(--text-muted);
        margin-bottom: 1rem;
      }

      a {
        text-decoration: none;
        color: inherit;
        transition: 0.3s;
      }

      /* --- HERO SECTION --- */
      .hero {
        min-height: 90vh;
        display: flex;
        flex-direction: column;
        justify-content: center;
        position: relative; /* Wichtig für die Positionierung der Maus */
        animation: fadeIn 1s ease-out;
      }

      .hero-badge {
        font-family: var(--font-mono);
        font-size: 0.9rem;
        color: var(--accent-primary);
        margin-bottom: 1rem;
        display: block;
      }

      .hero h1 {
        font-size: clamp(3rem, 8vw, 5rem);
        line-height: 1.1;
        margin-bottom: 1.5rem;
      }

      .hero-name {
        /* ANPASSUNG: Gradient von Weiß zu Grün */
        background: linear-gradient(45deg, #fff, var(--accent-primary));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
      }

      .hero-desc {
        font-size: 1.1rem;
        max-width: 600px;
        color: var(--text-muted);
      }

      .social-links {
        margin-top: 2rem;
        display: flex;
        gap: 1rem;
      }

      /* --- SCROLL DOWN MOUSE ANIMATION (NEU) --- */
      .scroll-down-container {
        position: absolute;
        bottom: 30px;
        left: 50%;
        transform: translateX(-50%);
        opacity: 0.7;
        transition: opacity 0.3s ease;
      }

      .scroll-down-container:hover {
        opacity: 1;
        cursor: pointer;
      }

      .mouse {
        width: 26px;
        height: 42px;
        border: 2px solid var(--text-muted);
        border-radius: 20px;
        position: relative;
      }

      .wheel {
        width: 4px;
        height: 8px;
        background: var(--accent-primary);
        border-radius: 2px;
        position: absolute;
        top: 6px;
        left: 50%;
        transform: translateX(-50%);
        animation: scroll 1.5s infinite;
      }

      @keyframes scroll {
        0% {
          opacity: 1;
          top: 6px;
        }
        50% {
          opacity: 1;
          top: 18px;
        }
        100% {
          opacity: 0;
          top: 18px;
        }
      }

      /* NEU: Button-Stil für den Header-Button (basierend auf social-btn) */
      .header-btn {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 8px 16px;
        background: var(--card-bg);
        border: 1px solid var(--border-color);
        border-radius: 8px;
        font-family: var(--font-mono);
        font-size: 0.9rem;
        color: var(--text-main); /* Sicherstellen, dass der Text sichtbar ist */
      }
      .header-btn i {
        color: var(--accent-primary); /* Icon in Akzentfarbe */
      }

      .header-btn:hover {
        background: var(--border-color);
        color: #fff;
      }

      .social-btn {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 10px 20px;
        background: var(--card-bg);
        border: 1px solid var(--border-color);
        border-radius: 8px;
        font-family: var(--font-mono);
        font-size: 0.9rem;
      }

      .social-btn:hover {
        background: var(--border-color);
        color: #fff;
      }

      /* --- ABOUT SECTION --- */
      .about-content {
        background: linear-gradient(
          180deg,
          rgba(15, 15, 15, 0.8),
          rgba(15, 15, 15, 0.4)
        );
        border: 1px solid var(--border-color);
        border-radius: 16px;
        padding: 2rem;
        backdrop-filter: blur(5px);
      }

      /* --- TECH STACK --- */
      .tech-grid {
        display: flex;
        justify-content: flex-start;
        align-items: center;
        padding: 1rem 0;
      }

      .tech-grid img {
        max-width: 100%;
        height: auto;
        border-radius: 8px;
        background: var(--card-bg);
        border: 1px solid var(--border-color);
        padding: 1.5rem;
      }

      /* --- PROJECTS GRID (Wie im Screenshot) --- */
      .projects-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
        gap: 1.5rem;
      }

      .project-card {
        background: var(--card-bg);
        border: 1px solid var(--border-color);
        border-radius: 12px;
        padding: 1.5rem;
        display: flex;
        flex-direction: column;
        transition: 0.3s;
        position: relative;
        overflow: hidden;
      }

      .project-card:hover {
        border-color: var(--text-muted);
        transform: translateY(-2px);
      }

      .project-header {
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 1rem;
      }

      .project-icon {
        width: 40px;
        height: 40px;
        background: #1e1e1e;
        border-radius: 8px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--accent-primary);
      }

      .project-title {
        font-size: 1.2rem;
        font-weight: 700;
        font-family: var(--font-mono);
      }

      .project-desc {
        font-size: 0.9rem;
        margin-bottom: 1.5rem;
        flex-grow: 1;
      }

      .tags {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        margin-bottom: 1.5rem;
      }

      .tag {
        background: #1e1e1e;
        color: var(--text-muted);
        padding: 4px 10px;
        border-radius: 4px;
        font-size: 0.75rem;
        font-family: var(--font-mono);
        border: 1px solid #333;
      }

      .project-links {
        display: flex;
        gap: 10px;
      }

      .btn-small {
        padding: 8px 14px;
        border-radius: 6px;
        font-size: 0.85rem;
        font-family: var(--font-mono);
        border: 1px solid var(--border-color);
        background: transparent;
        color: var(--text-main);
        display: inline-flex;
        align-items: center;
        gap: 6px;
        width: fit-content;
      }

      .btn-small:hover {
        background: #27272a;
      }

      /* --- FOOTER --- */
      footer {
        text-align: center;
        padding: 3rem 0;
        border-top: 1px solid var(--border-color);
        margin-top: 4rem;
        font-family: var(--font-mono);
        font-size: 0.8rem;
        color: var(--text-muted);
      }

      /* --- ANIMATIONS --- */
      @keyframes fadeIn {
        from {
          opacity: 0;
          transform: translateY(20px);
        }
        to {
          opacity: 1;
          transform: translateY(0);
        }
      }

      @media (max-width: 768px) {
        .hero h1 {
          font-size: 2.5rem;
        }
        .projects-grid {
          grid-template-columns: 1fr;
        }
      }