body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: #f4f6f8;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: auto;
    padding: 16px;
}

header {
    text-align: center;
    margin-bottom: 20px;
}

h1 {
    margin: 0;
}

.card {
    background: white;
    padding: 16px;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}

input {
    width: 100%;
    padding: 16px;
    font-size: 18px;
    border: 1px solid #ccc;
    border-radius: 6px;
    margin-bottom: 10px;
}

.results div {
    padding: 10px;
    border-bottom: 1px solid #eee;
    cursor: pointer;
}

.results div:hover {
    background: #f0f8ff;
}

.active-user {
    padding: 12px;
    background: #e8f5e9;
    border-radius: 6px;
}

.hidden {
    display: none;
}

.success {
    color: green;
}

.error {
    color: red;
}

.warning {
    color: orange;
}

button {
    width: 100%;
    padding: 16px;
    font-size: 18px;
    border: none;
    border-radius: 6px;
    background: #1976d2;
    color: white;
    cursor: pointer;
}

button:hover {
    background: #1565c0;
}