body {
    font-family: 'Montserrat', sans-serif;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    height: auto;
    background: linear-gradient(to right, #667eea, #764ba2);
}

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

.card {
    background-color: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

.header {
    background-color: #000835;
    color: #fff;
    padding: 5px;
    text-align: center;
}

.content {
    padding: 20px;
}

button {
    background-color: #4CAF50;
    color: #fff;
    padding: 10px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #45a049;
}

.otp-form {
    display: none;
    flex-direction: column;
    align-items: center;
    margin-top: 20px;
}

input {
    width: calc(100% - 30px);
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    outline: none;
}

.success-message {
    display: none;
    flex-direction: column;
    align-items: center;
    margin-top: 20px;
    color: #4CAF50;
}

.error-message {
    color: #e74c3c;
    margin-top: 10px;
}

button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

.success-message p {
    margin: 10px 0;
}

.otp-display {
    margin-top: 20px;
    text-align: center;
}

.otp-text {
    font-size: 18px;
    margin: 0;
}

input:disabled {
    background-color: #f2f2f2;
    color: #a0a0a0;
    cursor: not-allowed;
}

.timer {
    margin-top: 10px;
    font-size: 14px;
}