:root {
    --bg-color: #121212;
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-color: #e0e0e0;
    --accent-color: #00d2ff; /* Neon Blau */
    --success-color: #00ff88;
    --danger-color: #ff4b4b;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Container */
.container {
    width: 100%;
    max-width: 600px; /* Mobil-optimiert */
    margin: 0 auto;
    padding: 20px;
    box-sizing: border-box;
}

/* Glass Cards */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

h1, h2, h3 { margin-top: 0; font-weight: 600; }
h1 { color: var(--accent-color); text-align: center; }

/* Buttons */
.btn {
    display: block;
    width: 100%;
    padding: 15px;
    margin: 10px 0;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.1s;
    color: #000;
}

.btn:active { transform: scale(0.98); }

.btn-primary { background: var(--accent-color); color: #000; }
.btn-success { background: var(--success-color); color: #000; }
.btn-danger { background: var(--danger-color); color: #fff; }
.btn-logout { 
    background: rgba(255,255,255,0.1); 
    color: #fff; 
    border: 1px solid rgba(255,255,255,0.2); 
    display: inline-block;
    padding: 8px 16px;
    width: auto;
}

/* Formulare */
input {
    width: 100%;
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    background: rgba(0,0,0,0.3);
    color: #fff;
    font-size: 16px;
    box-sizing: border-box;
    outline: none;
}
input:focus { border-color: var(--accent-color); }

/* Dashboard Grid */
.grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.tile {
    background: rgba(255,255,255,0.05);
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--glass-border);
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}
.tile:hover { background: rgba(255,255,255,0.1); }
.tile strong { display: block; font-size: 24px; margin-bottom: 5px; color: var(--accent-color); }

/* Alerts */
.alert {
    background: rgba(255, 75, 75, 0.2);
    border: 1px solid var(--danger-color);
    color: #ffcccc;
    padding: 10px;
    border-radius: 8px;
    text-align: center;
    margin-bottom: 15px;
}