:root {
    --primary-color: #4361ee;
    --primary-dark: #3a56d4;
    --primary-light: #eef2ff;
    --secondary-color: #3f37c9;
    --success-color: #4bb543;
    --error-color: #ff3333;
    --warning-color: #ff9800;
    --text-color: #2d3748;
    --text-light: #718096;
    --border-color: #e2e8f0;
    --bg-color: #f8fafc;
    --white: #ffffff;
    --google-red: #db4437;
    --microsoft-blue: #0078d4;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
}

.auth-wrapper {
    display: flex;
    min-height: 100vh;
}

.auth-branding {
    flex: 1;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.logo {
    max-width: 180px;
    margin-bottom: 2rem;
}

.auth-branding h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.auth-branding p {
    opacity: 0.9;
    max-width: 400px;
}

.auth-container {
    width: 100%;
    max-width: 500px;
    background: var(--white);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
}

.auth-header {
    padding: 1.5rem 2rem 0;
}

.auth-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    padding: 1rem;
    background: none;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.tab-btn.active {
    color: var(--primary-color);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
}

.auth-body {
    padding: 2rem;
    flex: 1;
}

.alert {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert.error {
    background-color: rgba(255, 51, 51, 0.1);
    color: var(--error-color);
    border: 1px solid rgba(255, 51, 51, 0.2);
}

.alert.success {
    background-color: rgba(75, 181, 67, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(75, 181, 67, 0.2);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    position: relative;
}

.form-group.floating label {
    position: absolute;
    top: 1rem;
    left: 2.5rem;
    color: var(--text-light);
    transition: var(--transition);
    pointer-events: none;
}

.form-group.floating i {
    position: absolute;
    top: 1rem;
    left: 1rem;
    color: var(--text-light);
    transition: var(--transition);
}

.form-group.floating input:focus ~ i,
.form-group.floating input:not(:placeholder-shown) ~ i,
.form-group.floating select:focus ~ i,
.form-group.floating select:not([value=""]) ~ i {
    color: var(--primary-color);
}

.form-group.floating input:focus ~ label,
.form-group.floating input:not(:placeholder-shown) ~ label,
.form-group.floating select:focus ~ label,
.form-group.floating select:not([value=""]) ~ label {
    top: -0.6rem;
    left: 2.5rem;
    font-size: 0.75rem;
    background: var(--white);
    padding: 0 0.5rem;
    color: var(--primary-color);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 1rem 1rem 1rem 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

.toggle-password {
    position: absolute;
    right: 1rem;
    top: 1rem;
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: 0.25rem;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.remember-me input {
    accent-color: var(--primary-color);
}

.forgot-password {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.875rem;
}

.forgot-password:hover {
    text-decoration: underline;
}

.btn {
    padding: 1rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
}

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

.auth-divider {
    display: flex;
    align-items: center;
    margin: 1.5rem 0;
    color: var(--text-light);
    font-size: 0.875rem;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
    margin: 0 1rem;
}

.social-login {
    display: flex;
    gap: 1rem;
}

.btn-social {
    flex: 1;
    background: var(--white);
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

.btn-social:hover {
    background-color: var(--bg-color);
}

.btn-social.google {
    color: var(--google-red);
    border-color: rgba(219, 68, 55, 0.2);
}

.btn-social.microsoft {
    color: var(--microsoft-blue);
    border-color: rgba(0, 120, 212, 0.2);
}

.form-terms {
    font-size: 0.875rem;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-terms input {
    accent-color: var(--primary-color);
}

.form-terms a {
    color: var(--primary-color);
    text-decoration: none;
}

.form-terms a:hover {
    text-decoration: underline;
}

.auth-footer {
    margin-top: 1.5rem;
    text-align: center;
    color: var(--text-light);
    font-size: 0.875rem;
}

.switch-tab {
    color: var(--primary-color);
    text-decoration: none;
    cursor: pointer;
}

.switch-tab:hover {
    text-decoration: underline;
}

/* Responsive styles */
@media (max-width: 768px) {
    .auth-wrapper {
        flex-direction: column;
    }
    
    .auth-branding {
        padding: 2rem 1rem;
    }
    
    .auth-container {
        max-width: 100%;
    }
}

/* Animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.tab-content {
    animation: fadeIn 0.3s ease-out;
}