/* --- GLOBALE VARIABLEN & RESET --- */
:root {
    --green: #2ecc71;
    --dark: #2c3e50;
    --shadow: 0 4px 15px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; }
body { 
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; 
    background-color: #f4f7f6; 
    color: #333; 
    margin: 0; 
    padding: 0; 
    line-height: 1.6; 
}
.wrapper { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* --- GLOBALER HEADER (BLAUER BALKEN) --- */
.top-nav {
    background-color: var(--dark);
    color: white;
    padding: 20px 0;
    margin-bottom: 30px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center; 
}

.top-nav .wrapper {
    display: flex;
    justify-content: center; 
    align-items: center;     
    gap: 25px;
}

.top-nav h1 { 
    margin: 0; 
    font-size: 1.8em; 
    font-weight: normal; 
    line-height: 1.1;
}
.top-nav h1 b { font-weight: bold; color: var(--green); }

/* NEU: Styling für den Zurück-Link unter der Überschrift */
.sub-nav-link {
    display: block;
    margin-top: 8px;
    color: white !important;
    text-decoration: none;
    font-size: 0.85em;
    opacity: 0.7;
    transition: 0.2s;
}
.sub-nav-link:hover {
    opacity: 1;
    text-decoration: underline;
}

/* --- RESTLICHE DESIGNS --- */
.card { background: white; padding: 25px; border-radius: 12px; box-shadow: var(--shadow); margin-bottom: 30px; }
.quick-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; margin-bottom: 0; }
.stat-box { background: white; padding: 20px; border-radius: 12px 12px 0 0; text-align: center; border-top: 4px solid var(--green); }
.stat-box strong { display: block; font-size: 2.2em; color: var(--dark); line-height: 1; margin-bottom: 5px; }
.stat-box span { color: #7f8c8d; text-transform: uppercase; font-size: 0.75em; font-weight: bold; }
.class-bar { background: var(--dark); color: white; padding: 15px 20px; border-radius: 0 0 12px 12px; display: flex; justify-content: space-around; flex-wrap: wrap; margin-bottom: 40px; }
.class-unit { text-align: center; padding: 5px 10px; }
.class-unit b { font-size: 1.2em; color: var(--green); }
.menu-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.menu-card { background: white; padding: 25px; border-radius: 12px; text-decoration: none; color: inherit; display: flex; align-items: center; transition: 0.3s; box-shadow: var(--shadow); border: 1px solid transparent; }
.menu-card:hover { transform: translateY(-4px); border-color: var(--green); }
.icon { font-size: 2.5em; margin-right: 20px; }
.dashboard-footer { text-align: center; margin-top: 50px; padding-top: 20px; border-top: 1px solid #ddd; color: #95a5a6; font-size: 0.85em; }
.dashboard-footer a { color: #7f8c8d; text-decoration: none; margin: 0 10px; }
.admin-badge { background: #e74c3c; color: white; padding: 3px 8px; border-radius: 4px; font-size: 0.7em; margin-left: 10px; vertical-align: middle; }