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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #f5f5f5;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.login-box {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 40px;
}

/* Login header grouping */
.login-header {
    margin-bottom: 30px;
}

/* Form improvements */
.login-form {
    width: 100%;
}

.form-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-input:focus {
    outline: none;
    border-color: #4CAF50;
}

/* Button text for better loading state support */
.btn-text {
    display: inline-block;
}

/* Tablet responsive adjustments */
@media (max-width: 768px) {
    .login-container {
        max-width: 100%;
        padding: 16px;
    }
    
    .login-box {
        padding: 32px;
    }
}

/* Mobile responsive adjustments */
@media (max-width: 640px) {
    .login-container {
        padding: 15px;
    }
    
    .login-box {
        padding: 25px;
        box-shadow: 0 1px 5px rgba(0, 0, 0, 0.1);
    }
    
    .login-box h1 {
        font-size: 24px;
    }
    
    .login-box h2 {
        font-size: 16px;
    }
    
    .form-group label {
        font-size: 13px;
    }
    
    .form-input,
    .form-group input {
        font-size: 16px; /* Prevents zoom on iOS */
        padding: 12px;
    }
    
    .btn {
        font-size: 15px;
        padding: 14px;
    }
    
    .alert {
        font-size: 13px;
        padding: 10px;
    }
}

/* Small mobile responsive adjustments */
@media (max-width: 480px) {
    .login-box {
        padding: 20px;
    }
    
    .login-header {
        margin-bottom: 24px;
    }
    
    .login-box h1 {
        font-size: 22px;
        margin-bottom: 8px;
    }
    
    .login-box h2 {
        font-size: 15px;
    }
}

.login-box h1 {
    color: #333;
    font-size: 28px;
    margin-bottom: 10px;
    text-align: center;
}

.login-box h2 {
    color: #666;
    font-size: 18px;
    font-weight: normal;
    margin-bottom: 30px;
    text-align: center;
}

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

.form-group label {
    display: block;
    color: #333;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
}

.form-group input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #4CAF50;
}

.btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn-primary {
    background-color: #4CAF50;
    color: white;
}

.btn-primary:hover {
    background-color: #45a049;
}

.alert {
    padding: 12px;
    margin-bottom: 20px;
    border-radius: 4px;
    font-size: 14px;
}

.alert-error {
    background-color: #fee;
    color: #c33;
    border: 1px solid #fcc;
}

.alert-success {
    background-color: #efe;
    color: #3c3;
    border: 1px solid #cfc;
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #1a1a1a;
    }
    
    .login-box {
        background: #2a2a2a;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    }
    
    .login-box h1 {
        color: #f0f0f0;
    }
    
    .login-box h2 {
        color: #ccc;
    }
    
    .form-group label {
        color: #e0e0e0;
    }
    
    .form-input,
    .form-group input {
        background-color: #333;
        border-color: #444;
        color: #f0f0f0;
    }
    
    .form-input:focus,
    .form-group input:focus {
        border-color: #5cb85c;
    }
}