body {
    margin: 0;
    font-family: Arial;
    background: #f1f5f9;
}

/* Top bar */
.topbar {
    background: #0f172a;
    color: white;
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar h1 {
    font-size: 20px;
}

.login-btn {
    background: #2563eb;
    border: none;
    padding: 10px 20px;
    color: white;
    font-weight: bold;
    border-radius: 6px;
    cursor: pointer;
}

/* Dashboard */
.dashboard {
    padding: 40px;
}

.card {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    max-width: 1000px;
}

/* iFrame */
iframe {
    width: 100%;
    height: 70vh;
    border: none;
}