* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #333;
}

.container {
    background: white;
    border-radius: 10px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    padding: 40px;
    max-width: 500px;
    width: 90%;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

h1 {
    color: #4a5568;
    margin-bottom: 10px;
    font-size: 2.5rem;
}

header p {
    color: #718096;
    font-size: 1.1rem;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    color: #4a5568;
}

input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

button {
    width: 100%;
    padding: 12px 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease;
}

button:hover {
    transform: translateY(-2px);
}

button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.message {
    margin-top: 20px;
    padding: 12px 15px;
    border-radius: 5px;
    text-align: center;
    font-weight: 500;
}

.message.success {
    background-color: #c6f6d5;
    color: #22543d;
    border: 1px solid #9ae6b4;
}

.message.error {
    background-color: #fed7d7;
    color: #742a2a;
    border: 1px solid #feb2b2;
}

@media (max-width: 600px) {
    .container {
        padding: 20px;
    }

    h1 {
        font-size: 2rem;
    }
}