/* ==========================================================================
   1. DEIN BESTEHENDES BASIS-STYLING (Modernisiert mit CSS-Variablen)
   ========================================================================== */
:root {
    /* Farbpalette */
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    
    /* Navbar */
    --nav-bg: #1e293b;
    --nav-hover: #334155;
    
    /* Schatten & Kurven */
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.03), 0 1px 2px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(15, 23, 42, 0.05), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.08);
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    display: flex;
    background-color: var(--bg-main);
    color: var(--text-main);
    min-height: 100vh;
}

/* --- NAVIGATION LINKS --- */
.navbar {
    width: 260px;
    height: 100vh;
    background-color: var(--nav-bg);
    position: fixed;
    top: 0;
    left: 0;
    padding: 30px 20px;
    z-index: 1000;
    border-right: 1px solid rgba(255, 255, 255, 0.05);
}

.logo {
    display: flex;
    align-items: center;
    color: #fff;
    font-size: 22px;
    font-weight: 800;
    text-decoration: none;
    margin-bottom: 40px;
    letter-spacing: -0.5px;
}

.nav-toggle, .nav-toggle-label {
    display: none;
}

.nav-menu {
    list-style: none;
}

.nav-menu li {
    margin-bottom: 8px;
}

.nav-menu a {
    color: #94a3b8;
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    display: block;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-menu a:hover {
    background-color: var(--nav-hover);
    color: #fff;
    transform: translateX(4px); /* Subtiler Slide-Effekt */
}

/* --- HAUPTINHALT RECHTS --- */
.main-content {
    margin-left: 260px;
    padding: 60px 40px;
    flex-grow: 1;
}

/* ==========================================================================
   2. ISOLIERTES STYLING FÜR DIE PASSIV-EARN KOMPONENTEN
   ========================================================================== */
.container {
    max-width: 850px;
    margin: 0 auto;
}

/* Projekt-Header */
.container header {
    text-align: center;
    margin-bottom: 50px;
}

.container header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 16px;
    letter-spacing: -1px;
    background: linear-gradient(135deg, #0f172a 0%, #2563eb 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.container header p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 550px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Info-Box (Disclaimer) */
.disclaimer-top {
    background: linear-gradient(135deg, #fefce8 0%, #fef3c7 100%);
    border-left: 4px solid #eab308;
    color: #713f12;
    padding: 18px 24px;
    border-radius: var(--radius-md);
    margin-bottom: 40px;
    font-size: 0.95rem;
    line-height: 1.5;
    box-shadow: var(--shadow-sm);
}

/* Karten-Design (Cards) */
.card {
    background-color: var(--bg-card);
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

/* Subtiler Glanz-Effekt von oben bei Hover */
.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #2563eb, #60a5fa);
    opacity: 0;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: #cbd5e1;
}

.card:hover::before {
    opacity: 1;
}

/* Karten-Kopfzeile */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 1.45rem;
    font-weight: 750;
    color: var(--text-main);
    letter-spacing: -0.3px;
}

/* Badges / Abzeichen */
.badge {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 6px 14px;
    border-radius: 30px;
    background-color: #eff6ff;
    color: #1d4ed8;
    border: 1px solid #dbeafe;
}

.badge.bonus {
    background-color: #f0fdf4;
    color: #166534;
    border: 1px solid #dcfce7;
}

/* Karten-Inhalt */
.card-description {
    color: var(--text-muted);
    margin-bottom: 24px;
    font-size: 1rem;
    line-height: 1.6;
}

/* Features-Liste */
.card-features {
    list-style: none;
    margin-bottom: 30px;
    padding-left: 0;
}

.card-features li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 12px;
    font-size: 0.95rem;
    color: #334155;
    display: flex;
    align-items: center;
}

/* Modernerer Custom Checkmark */
.card-features li::before {
    content: "";
    position: absolute;
    left: 2px;
    width: 16px;
    height: 16px;
    background-color: #dcfce7;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.card-features li::after {
    content: "✓";
    position: absolute;
    left: 6px;
    color: #15803d;
    font-size: 11px;
    font-weight: 900;
}

/* Links/Buttons */
.btn {
    display: inline-block;
    width: 100%;
    text-align: center;
    background-color: var(--primary);
    color: #ffffff;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 14px 24px;
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2);
    transition: var(--transition);
}

.btn:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.3);
    transform: translateY(-1px);
}

/* Projekt-Footer */
.container footer {
    text-align: center;
    margin-top: 60px;
    padding-top: 30px;
    border-top: 1px solid #e2e8f0;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ==========================================================================
   3. MOBILE ANPASSUNG (Burger-Icon zentriert)
   ========================================================================== */
@media (max-width: 768px) {
    body {
        flex-direction: column; /* Menü oben, Inhalt darunter */
    }

    .navbar {
        width: 100%;
        height: auto;
        position: relative;
        padding: 15px 20px;
        background-color: #333;
        
        /* 3-Spalten-Layout: Links Logo, Mitte Burger, Rechts leer für perfekte Symmetrie */
        display: grid;
        grid-template-columns: 1fr auto 1fr;
        align-items: center;
    }

    .logo {
        margin-bottom: 0;
        font-size: 20px;
        grid-column: 1; /* Zwingt das Logo in die linke Spalte */
        justify-self: start;
    }

    .nav-toggle {
        display: none !important;
    }

    /* Das Burger-Menü-Icon */
    .nav-toggle-label {
        display: block;
        cursor: pointer;
        padding: 10px;
        z-index: 1001;
        grid-column: 2; /* Setzt den Burger exakt in die mittlere Spalte */
        justify-self: center; /* Zentriert das Icon horizontal */
    }

    .nav-toggle-label span,
    .nav-toggle-label span::before,
    .nav-toggle-label span::after {
        display: block;
        background: #ffffff;
        height: 2px;
        width: 25px;
        position: relative;
        transition: background 0.3s, transform 0.3s;
    }

    .nav-toggle-label span::before,
    .nav-toggle-label span::after {
        content: '';
        position: absolute;
    }

    .nav-toggle-label span::before { top: -8px; }
    .nav-toggle-label span::after { top: 8px; }

    /* Das ausklappbare Menü - Zentriert unter dem Burger-Icon */
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 50%;
        transform: translateX(-50%); /* Zentriert das Menü exakt unter dem Burger-Button */
        width: 250px;                 /* Exakt die Breite der Desktop-Seitenleiste */
        background-color: #333;
        padding: 20px;
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3); /* Schöner, gleichmäßiger Schatten nach unten */
        z-index: 999;
        list-style: none;
        border-radius: 8px;           /* Elegante Abrundung an allen Ecken */
    }

    .nav-menu li {
        margin-bottom: 15px;
        width: 100%;
        text-align: center;           /* Zentriert die Links im schmalen Menü */
    }

    .nav-menu a {
        font-size: 16px;
        padding: 8px 12px;
    }

    .nav-toggle:checked ~ .nav-menu {
        display: block !important;
    }

    /* Hauptinhalt & Inhalts-Karten am Smartphone optimieren */
    .main-content {
        margin-left: 0;
        padding: 20px 15px;
    }

    .container header h1 {
        font-size: 1.8rem;
    }

    .card-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .badge {
        align-self: flex-start;
    }
}