:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --dark: #0f172a;
    --text: #475569;
    --bg: #ffffff;
    --light-bg: #f8fafc;
    /* Der moderne System-Font-Stack */
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
}

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

body { 
    font-family: var(--font-main); 
    color: var(--dark); 
    line-height: 1.6; 
    background-color: var(--bg);
    -webkit-font-smoothing: antialiased; /* Macht Schrift auf Macs schärfer */
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* Navbar */
.navbar { padding: 1.5rem 0; background: rgba(255, 255, 255, 0.9); backdrop-filter: blur(10px); position: sticky; top: 0; z-index: 100; border-bottom: 1px solid #f1f5f9; }
.navbar .container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-weight: 800; font-size: 1.5rem; text-decoration: none; color: var(--dark); letter-spacing: -0.5px; }
.logo span { color: var(--primary); }
.nav-links { list-style: none; display: flex; align-items: center; gap: 2rem; }
.nav-links a { text-decoration: none; color: var(--text); font-weight: 600; font-size: 0.95rem; }
.btn-nav { background: var(--primary); color: white !important; padding: 0.6rem 1.2rem; border-radius: 8px; transition: background 0.2s; }
.btn-nav:hover { background: var(--primary-dark); }

/* Hero Section */
.hero { padding: 120px 0 80px; text-align: center; background: radial-gradient(circle at top, #eff6ff 0%, #ffffff 100%); }
.hero h1 { font-size: 4rem; font-weight: 800; line-height: 1.1; margin-bottom: 1.5rem; letter-spacing: -2px; }
.hero h1 span { color: var(--primary); }
.hero p { font-size: 1.25rem; color: var(--text); max-width: 650px; margin: 0 auto 2.5rem; }

.hero-btns { display: flex; justify-content: center; gap: 1rem; }
.btn-primary { background: var(--primary); color: white; padding: 1rem 2rem; text-decoration: none; border-radius: 10px; font-weight: 600; transition: transform 0.2s; }
.btn-primary:hover { transform: translateY(-2px); }
.btn-secondary { padding: 1rem 2rem; color: var(--dark); text-decoration: none; font-weight: 600; }

/* Features Section */
.features { padding: 100px 0; background: var(--light-bg); }
.section-title { text-align: center; margin-bottom: 4rem; font-size: 2.5rem; font-weight: 800; letter-spacing: -1px; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.feature-card { background: white; padding: 3rem; border-radius: 16px; border: 1px solid #e2e8f0; transition: all 0.3s; }
.feature-card:hover { border-color: var(--primary); box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1); }
.feature-card h3 { margin: 1.5rem 0 1rem; font-size: 1.25rem; }
.feature-card p { color: var(--text); font-size: 0.95rem; }
.icon { font-size: 2.5rem; }

/* Footer */
.footer { padding: 4rem 0; text-align: center; color: var(--text); font-size: 0.9rem; border-top: 1px solid #e2e8f0; }