:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --background-color: #f4f7f6;
    --card-bg-color: #ffffff;
    --text-color: #333;
    --border-color: #ddd;
    --error-color: #d9534f;
}

body {
    background-color: var(--background-color);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
}

.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.auth-card {
    background-color: var(--card-bg-color);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-logo {
    width: 80px;
    margin-bottom: 15px;
}

.auth-header h1 {
    margin: 0;
    font-size: 24px;
    font-weight: 600;
}

.auth-header p {
    margin: 5px 0 0;
    color: var(--secondary-color);
}

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

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

.auth-form input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.2s;
}

.auth-form input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}

.btn {
    display: inline-block;
    padding: 12px 20px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    transition: background-color 0.2s, box-shadow 0.2s;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: #0056b3;
}

.btn-secondary {
    background-color: #f8f9fa;
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: #e2e6ea;
}

.btn-block {
    width: 100%;
}

.google-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.google-btn img {
    width: 20px;
    height: 20px;
}

.error-message {
    color: var(--error-color);
    background-color: #fdd;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 15px;
    text-align: center;
}

.hidden {
    display: none;
}

.auth-footer {
    text-align: center;
    margin-top: 20px;
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
}

.auth-footer a:hover {
    text-decoration: underline;
}

.or-separator {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 20px 0;
    color: var(--secondary-color);
}

.or-separator::before,
.or-separator::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border-color);
}

.or-separator:not(:empty)::before {
    margin-right: .25em;
}

.or-separator:not(:empty)::after {
    margin-left: .25em;
}