:root {
    --primary: #2196F3;
    --primary-dark: #1976D2;
    --success: #4CAF50;
    --error: #F44336;
    --text: #333;
    --text-light: #666;
    --border: #ddd;
    --bg-light: #f5f5f5;
    --white: #fff;
}

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

.auth-body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #f5f7fa, #e4e9f2);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.auth-container {
    width: 100%;
    max-width: 480px;
    margin: auto;
}

.auth-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h1 {
    font-size: 1.75rem;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.brand-highlight {
    color: var(--primary);
}

.auth-header p {
    color: var(--text-light);
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text);
    font-weight: 500;
}

.input-group {
    position: relative;
}

.input-group i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
}

.input-group input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-light);
    cursor: pointer;
}

.checkbox-label input {
    accent-color: var(--primary);
}

.forgot-link {
    color: var(--primary);
    text-decoration: none;
}

.btn-primary {
    width: 100%;
    padding: 0.875rem;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

.auth-footer {
    text-align: center;
    color: var(--text-light);
}

.auth-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.alert {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
}

.alert-error {
    background: rgba(244, 67, 54, 0.1);
    color: var(--error);
    border: 1px solid rgba(244, 67, 54, 0.2);
}

.alert-success {
    background: rgba(76, 175, 80, 0.1);
    color: var(--success);
    border: 1px solid rgba(76, 175, 80, 0.2);
}

@media (max-width: 480px) {
    .auth-card {
        padding: 1.5rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .form-options {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
}