body {
    font-family: Arial, sans-serif;
    background: #0f172a; /* tamna pozadina */
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    color: #e2e8f0;
}

.card {
    background: #1e293b; /* tamna kartica */
    padding: 30px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.6);
    text-align: center;
    width: 300px;
}

.name {
    font-size: 20px;
    margin-bottom: 20px;
    color: #f1f5f9;
}

.status {
    font-size: 18px;
    margin-bottom: 20px;
    padding: 12px;
    border-radius: 10px;
    font-weight: bold;
}

/* slobodan */
.free {
    background: rgba(34, 197, 94, 0.15);
    color: #4ade80;
}

/* na sastanku */
.busy {
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
}

button {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    background: #3b82f6;
    color: white;
    transition: 0.2s;
}

button:hover {
    background: #2563eb;
}