* {
    box-sizing: border-box;
}

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

body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #0b0f19;
    color: #ffffff;
}

.container {
    width: 100%;
    max-width: 500px;
    padding: 20px;
}

.card {
    padding: 35px;
    border-radius: 18px;
    background: #151b29;
    border: 1px solid #273044;
    text-align: center;
}

h1 {
    margin-top: 0;
    margin-bottom: 15px;
}

p {
    color: #aeb8ca;
    margin-bottom: 25px;
}

button {
    width: 100%;
    padding: 14px;
    border: 0;
    border-radius: 10px;
    background: #ffffff;
    color: #000000;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}