:root {
    --bs-primary: #0052FF;
    --bs-primary-rgb: 0, 82, 255;
    --bs-secondary: #F0F6FF;
    --bs-success: #34C759;
    --bs-font-sans-serif: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    background-color: #F8F9FA;
}

.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,.05);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--bs-primary);
}

.btn-primary {
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    transition: all 0.2s ease-in-out;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(var(--bs-primary-rgb), 0.2);
}

.card {
    border: 1px solid #EAECEF;
    border-radius: 0.75rem;
    box-shadow: 0 4px 6px rgba(0,0,0,.04);
}

.form-control, .form-select {
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 0.25rem rgba(var(--bs-primary-rgb), 0.25);
}

.input-group-text {
    border-radius: 0.5rem 0 0 0.5rem;
}

.needs-validation .form-control:invalid,
.needs-validation .form-select:invalid {
    border-color: var(--bs-danger);
}