:root {
    --primary-color: #4A90E2;
    --background-color: #F4F7FA;
    --surface-color: #FFFFFF;
    --text-color: #333333;
    --error-color: #D0021B;
    --border-radius: 8px;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 2rem;
}

.login-card {
    background-color: var(--surface-color);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    text-align: center;
}

.login-card h1 {
    font-weight: 700;
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.login-card .tagline {
    margin-bottom: 2rem;
    color: #6c757d;
}

.form-control {
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
    border: 1px solid #ced4da;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(74, 144, 226, 0.25);
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    border-radius: var(--border-radius);
    padding: 0.75rem;
    font-weight: 600;
    transition: background-color 0.2s ease-in-out;
}

.btn-primary:hover {
    background-color: #357ABD;
    border-color: #357ABD;
}

.phi-banner {
    margin-top: 2rem;
    padding: 1rem;
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    text-align: left;
}