* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    width: 100%;
    min-height: 100%;
    font-family: Arial, sans-serif;
    background: #f4f6f8;
}

body {
    min-height: 100vh;
}

.app-container {
    width: 100%;
    max-width: 700px;
    margin: 0 auto;
    padding: 16px;
}

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

.app-header h1 {
    margin: 0;
    font-size: 24px;
}

.app-header p {
    margin-top: 6px;
    color: #666;
}

.card {
    background: #ffffff;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

@media (max-width: 480px) {

    .app-container {
        padding: 10px;
    }

    .app-header h1 {
        font-size: 21px;
    }

    .card {
        padding: 16px;
    }

}