* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #667eea, #764ba2);
}

.box {
    width: 90%;
    max-width: 400px;
    padding: 35px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
}

h1 {
    text-align: center;
}

input {
    width: 100%;
    padding: 14px;
    margin: 8px 0;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
}

button,
.button {
    width: 100%;
    display: block;
    margin-top: 15px;
    padding: 14px;
    border: none;
    border-radius: 8px;
    background: #667eea;
    color: white;
    text-align: center;
    text-decoration: none;
    font-size: 16px;
    cursor: pointer;
}

button:hover,
.button:hover {
    background: #5568d9;
}

.error {
    padding: 12px;
    margin-bottom: 15px;
    border-radius: 8px;
    background: #fee2e2;
    color: #991b1b;
}

.success {
    padding: 12px;
    margin-bottom: 15px;
    border-radius: 8px;
    background: #dcfce7;
    color: #166534;
}

p {
    text-align: center;
}