body {
    background: linear-gradient(135deg, var(--primary-color, #4a90e2) 0%, var(--admin-gradient-purple, #764ba2) 100%);
    font-family: var(--font-family, 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    background: var(--background-secondary, #ffffff);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color-light, #e9ecef);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-header {
    margin-bottom: 2rem;
}

.login-header h1 {
    color: var(--admin-text, #2d3748);
    margin: 0 0 0.5rem 0;
    font-size: 1.8rem;
}

.login-header p {
    color: var(--text-color-light, #666);
    margin: 0;
    font-size: 0.9rem;
}

.login-form {
    margin-bottom: 1.5rem;
}

.login-container .form-group {
    margin-bottom: 1rem;
    text-align: left;
}

.login-container .form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--admin-text, #2d3748);
    font-weight: 500;
}

.login-container .form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color, #dee2e6);
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    box-sizing: border-box;
}

.login-container .form-group input:focus {
    outline: none;
    border-color: var(--primary-color, #4a90e2);
}

.login-btn {
    width: 100%;
    padding: 0.75rem;
    background: linear-gradient(135deg, var(--primary-color, #4a90e2) 0%, var(--admin-gradient-purple, #764ba2) 100%);
    color: var(--background-secondary, #ffffff);
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.login-btn:hover {
    transform: translateY(-2px);
}

.login-btn:active {
    transform: translateY(0);
}

.error-message {
    background: rgba(229, 62, 62, 0.08);
    color: var(--error-color, #e53e3e);
    padding: 0.75rem;
    border-radius: 5px;
    margin-bottom: 1rem;
    border: 1px solid rgba(229, 62, 62, 0.25);
    display: none;
}

.back-link {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e9ecef;
}

.back-link a {
    color: var(--primary-color, #4a90e2);
    text-decoration: none;
    font-size: 0.9rem;
}

.back-link a:hover {
    text-decoration: underline;
}