* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(45deg, #2c3e50, #3498db);
}

.container {
    background: #333;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
    width: 90%;
    max-width: 380px;
}

h1 {
    text-align: center;
    color: #ecf0f1;
    margin-bottom: 25px;
    font-size: 24px;
}

.form-group {
    margin-bottom: 15px;
}

input {
    width: 100%;
    padding: 12px;
    border: 1px solid #555;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
    color: #000;
}

input:focus {
    outline: none;
    border-color: #3498db;
}

input::placeholder {
    color: #999;
}

button {
    width: 100%;
    padding: 12px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s ease;
}

button:hover {
    background: #2980b9;
}

.links {
    margin-top: 15px;
    text-align: center;
    color: #ecf0f1;
}

.links a {
    color: #3498db;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.links a:hover {
    color: #2980b9;
}

.social-login {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    gap: 15px;
}

.social-icon {
    width: 40px;
    height: 40px;
    background: #4a5568;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.3s ease;
}

.social-icon:hover {
    background: #3498db;
}

@media (max-width: 480px) {
    h1 {
        font-size: 28px;
        padding-bottom: 20px;
    }

    input, button {
        padding: 15px;
        font-size: 18px;
    }

    .container {
        padding: 20px;
    }

    .form-group {
        margin-bottom: 15px;
    }

    input::placeholder {
        font-size: 16px;
    }
}