/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background-color: #f4f6f8;
    color: #333;
    font-size: 16px;
    line-height: 1.5;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Login page layout */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    width: 100%;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.login-container {
    width: 100%;
    max-width: 500px;
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.login-header {
    text-align: center;
    margin-bottom: 10px;
}

.system-title {
    color: #1f2937;
    font-size: 28px;
    font-weight: bold;
    text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.login-form-container {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    padding: 35px;
    width: 100%;
}

.login-title {
    color: #1f2937;
    font-size: 24px;
    text-align: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid #e5e7eb;
}

.message-container {
    margin-bottom: 20px;
}

.message {
    padding: 12px;
    border-radius: 4px;
    margin-bottom: 10px;
}

.error {
    background-color: #fee2e2;
    color: #b91c1c;
}

.success {
    background-color: #d1fae5;
    color: #047857;
}

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

.login-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #4b5563;
}

.login-form .form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #d1d5db;
    border-radius: 4px;
    font-size: 16px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.login-form .form-control:focus {
    border-color: #60a5fa;
    outline: none;
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.2);
}

.form-actions {
    margin-top: 30px;
    text-align: center;
}

.login-button {
    background-color: #1f2937;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 12px 30px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
    width: 100%;
}

.login-button:hover {
    background-color: #374151;
}

.login-footer {
    text-align: center;
    color: #6b7280;
    font-size: 14px;
    margin-top: 10px;
}

/* Responsive adjustments */
@media (max-width: 600px) {
    .login-container {
        max-width: 90%;
    }
    
    .login-form-container {
        padding: 25px 20px;
    }
    
    .system-title {
        font-size: 24px;
    }
    
    .login-title {
        font-size: 20px;
    }
}