:root {
    --primary-color: #4285f4;
    --secondary-color: #34a853;
    --accent-color: #ea4335;
    --background-color: #f5f5f5;
    --card-color: #ffffff;
    --text-color: #333333;
    --error-color: #ea4335;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-card {
    background-color: var(--card-color);
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 30px;
    text-align: center;
}

.logo {
    margin-bottom: 30px;
}

.logo-img {
    max-width: 100%;
    height: auto;
    margin-bottom: 15px;
}

.logo h1 {
    color: var(--primary-color);
    font-size: 24px;
    margin-bottom: 5px;
}

.logo h2 {
    color: var(--secondary-color);
    font-size: 16px;
    font-weight: normal;
}

.input-group {
    margin-bottom: 20px;
    text-align: left;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    transition: border 0.3s;
}

input:focus {
    border-color: var(--primary-color);
    outline: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 12px 20px;
    font-size: 16px;
    cursor: pointer;
    width: 100%;
    transition: background-color 0.3s;
}

.btn-primary:hover {
    background-color: #3367d6;
}

.error-message {
    color: var(--error-color);
    margin-top: 15px;
    font-size: 14px;
    min-height: 20px;
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    .login-card {
        padding: 20px;
    }
}